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Volume 37 (1968)
- Issue 4 Pages 465-
- Issue 3 Pages 329-
- Issue 2 Pages 143-
- Issue 1 Pages 1-
Volume 37, Issue 3
Displaying 1-21 of 21 articles from this issue
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Norimitsu ISHIKURA, Yoshiyuki KOMATSU, Yoichiro MASUO1968 Volume 37 Issue 3 Pages 329-334
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThis experiment was carried out in order to make clear the relation of the sowing time to plant growth and rice yields in the late seasonal cultivation. Varieties used for this experiment were Yukara (extremely short-term variety) and Fujiminori (short-term variety). Seeds were sown at six times from late June to early August. The authors tested the growth and yields affected by variations in sowing time. The results are summarized as follows: 1) Grain yields decreased with the delay in sowing time. It was explained that the reduction in yields was caused by decrease in the dry matter accumulation in panicles and in the ripening grade (the weight of 1, 000 kernels x the percentage of ripened grains). 2) The decrease in dry matter accumulation in panicles with the delay in sowing time was due to the reduction in the rate of dry matter production during the ripening period. The reduction in the rate of dry matter production during the ripening period was due to the decrease in the net assimilation rate and the amount of leaves, and affected equally by the decrease in the net assimilation rate in the case of Yukara and by the decrease in the net assimilation and the amount of leaves in the case of Fujiminori, respectively. 3) There were no grain yields when the heading time was so late (Fujiminori, sown on 8 August) as ripening was completely disturbed by unfavourable weather conditions. The decrease in grain yields with the delay in sowing time in Fujiminori was greater than in Yukara. 4) The decrease in ripening degree caused by the delay in sowing time was due to the lowered ratio of the quantity of dry matter accumulation in panicles to the number of hulls per unit area. Namely, it was due to the fact that the decrease in the quantity of dry matter accumulation in panicles per unit area was greater than the decrease in the number of hulls per unit area.View full abstractDownload PDF (745K) -
Toshikiyo SHINOHARA, Masaru OKA, Takumasa TSUKAMURA1968 Volume 37 Issue 3 Pages 335-340
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn the previous paper (I), the authors reported that in Setonaikai districts premature blossoming was frequently observed in tobacco plants transplanted at the age of 11th or 12th leaf. On the other hand, premature blossoming is scarcely observed in the Kanto provinces or the areas among Tyugoku Mountains. This experiment was carried out to make clear the causes of local differences of the developmental responses of tobacco seedlings. Three fields, which belonged to Kagoshima, Okayama and Utsunomiya Tobacco Experiment Station respectively, were selected with an eye on the different climatic conditions. Seedlings with 9 to 11 leaves of Hicks I-2 variety cultivated under the control condition (20-30°C, 12hrs.-light period) were sent from Okayama Tobacco Experiment Station to the other two experiment stations by rail in 15-20 hours. On April 2nd in 1963 these seedlings were transplanted to Okayama and Kagoshima fields and on April 17th in 1963 to Okayama and Utsunomiya fields at the same time. In the Kagoshima field leaves initiated at higher rate and plants bore greater number of leaves than those in the Okayama field. No difference in total leaf number among seedlings with different ages used for transplanting was observed in both fields. Temperature was higher in the Kagoshima field than that in the Okayama field throughout the growing season. Astronomical day-length in both fields differed little. Then it was thought that these differences in the developmental responses arose chiefly from temperature different among these two fields. Interdiurnal change of temperature was irregular in both fields, that caused no difference in total leaf number among seedlings with different ages used for transplanting. In the Utsunomiya field leaves initiated at lower rate than in the Okayama field. In the former however, plants bore greater number of leaves than those in the latter. Difference in total leaf number among seedlings with different ages used for transplanting was observed in the Okayama field, but not in the Utsunomiya field. Both astronomical day-length and daily mean temperatute were scarcely different among these two fields. However the diurnal variation of temperature differed; the diurnal range of it was greater in the Utsunomiya field than in the Okayama field. It was supposed that longer time of low temperature at night depressed the leaf initiation and longer time of high temperature at daytime retarded the flower-bud formation of tobacco seedlings in the Utsunomiya field.View full abstractDownload PDF (719K) -
Toshikiyo SHINOHARA1968 Volume 37 Issue 3 Pages 341-345
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn the previous paper (IV) it was reported that plants cultivated at the field belonging to Utsunomiya Tobacco Experiment Station produced greater number of leaves than those at the field belonging to Okayama Tobacco Expriment Station and that daily mean temperature was little different, however the diurnal variation of temperature was greater in the former than in the latter. Then studies were made on effects of diurnal variation of temperature upon the developmental responses of tobacco seedlings. Seedlings with 9 to 12 leaves of Hicks I-2 variety were used. In experiment I two temperature treatments were designed under 12hrs. day-length condition. In one of them daily mean temperature was 16°C and the diurnal range of it was 24°C. In the other, temperature during lightperiod was the same as the former, but temperature during dark-perid was higher by 9°C. Then the effect of temperature during dark-period upon the developmental responses was examined. Plants grew at higher rate and bore greater number of leaves under warm night than those under cool night. In experiment II three treatments on temperature were designed under 12hrs. day-length condition. Daily mean temperature was 16°C in all treatments. One was constant temperature (16°C), the others had the diurnal variation of temperature varied 23-9°C and 28-4°C respectively according to sine curve. The highest rate of leaf initiation was observed in the variation 23-9°C Plot and the lowest one in the variation 28-4°C Plot. In both the constant temperature Plot and the variation 23-9°C Plot, leaf initiation rate was slower with increasing of seeding-age at the beginning of treatment, however it differed little in the variation 28-4°C Plot. Plants bore the least number of leaves in the constant temperature Plot. In the variation 28-4°C Plot plants produced greater number of leaves than those in the variation 23-9°C Plot. Seedlings with more number of leaves at the beginning of treatment initiated floral primordia earlier, however little difference in total leaf number at flowering was observed in all plots.View full abstractDownload PDF (658K) -
Toshikiyo SHINOHARA, Masaru OKA, Takumasa TSUKAMURA1968 Volume 37 Issue 3 Pages 346-351
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
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Jun INOUYE, Kenji ITO1968 Volume 37 Issue 3 Pages 352-358
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThis experiment was made on the strength of plumule-elongation using unbonded gauge type transducer and automatic null balancing recorder. The materials used were rice, wheat, barley, rye, oat, corn, sorghum and italian millet plants. The plumules of each cereals were raised under the soil containing 11 percent moisture at 25°C or 27∼29°C. Soil covering was 2∼6 cm. At four different growing stages of plumule, the strength of plumule-elongation was measured in darkness at 30°C. The length of plumule at four different growing stages were 1.0∼1.7 cm, 2.4∼3.0 cm, 3.7∼4.3 cm and 5.0∼6.0 cm. Results are as follows : 1. In all stages the strength of plumule-elongation was strongest in corn plants and weakest in italian millet plants. The strength of another cereals differed in each growing stage (Table 2). 2. The strength of plumule-elongation decreased with the growth of plumules. It was more evident in the cereals which did not elongate mesocotyl than in the cereals which elongated mesocotyl (Table 3). 3. Among these cereals, possitive correlations were obtained between the strength of plumule-elongation and a seed weight, and between the strength and the basal diameter of the plumule respectively (Table 4).View full abstractDownload PDF (827K) -
Katsuichi NOGUCHI, Yoshihiko AKIMOTO, Hirohisa YAMANAKA, Toshiaki KITA ...1968 Volume 37 Issue 3 Pages 359-365
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThis experiment was performed to investigate the relation between growth of tobacco and soil temperature affected with plastic film mulch which is now getting popular in tobacco cultivation. The results were summarized as follows : (1) The number of total leaves of mulched tobacco was larger by two (on tobacco transplanted on April 5) and three (on tobacco transplanted on March 23) leaves than that of the unmulched. This increase in number of total leaves was thought to be dependent upon the rate of leaf initiation increased by changing of soil temperatures to higher levels with the aid of mulching. (2) Dry root weight of mulched tobacco was greater than that of the unmulched through early stages of growth. For example, dry root weight of mulched tobacco, transplanted on March 23, was 40 per cent more than that of the unmulched ones grown for 28 days after transplanting. (3) Total absorbed nitrogen per plant of mulched tobacco was twice as much as that of tobacco growm on bare ridge for 28 days after transplanting.View full abstractDownload PDF (722K) -
Tetsuro TANIYAMA, Hiroki ARIKADO1968 Volume 37 Issue 3 Pages 366-371
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn order to investigate experimentally the mechanism of injurious effects of sulfur dioxide on crop plants, an apparatus was assembled for fumigating the plants with sulfur dioxide in various concetrations determined by an SO2-analyzer of self-recording system. The apparatus was effective to corroborate the relation between the concentration of sulfur dioxide and the degree of leaf injuries caused by the gas. The resulfs obtained were as follows: 1. In tobacco plant, both dry weight and area of injured portion of the leaf increased with an increase of the concentration of sulfur dioxide to which the plants were exposed. 2. Tobacco plant and barley showed a higher percentage of dry weight of injured portion of the leaf at the flowering stage than at the vegetative stage, especially the leaf of the former plant being severely damaged. 3. In paddy rice, no significant difference in the susceptibility was observed between the highest tillering stage and the booting stage. 4. A relative resistance of crop plants to sulfur dioxide was expressed by the following order; in the vegetative stage, paddy rice> barley> tobacco plant> orchard grass> alsike clover and in the reproductive stage, paddy rice> barley> tobacco plant. 5. Two kinds of typical symptoms of injuries caused by sulfur dioxide were observed on the leaf-blade and-sheath of paddy rice : The one was countless spots of brown and brownish red color, and the other was lesions of white color, these symptoms being observed at the tip of the leaf-blade, interveinal and, sometimes, marginal parts of the leaf-blade and-sheath of paddy rice.View full abstractDownload PDF (715K) -
Harunosuke KAWAHARA, Nobuo CHONAN, Kiyoshi WADA1968 Volume 37 Issue 3 Pages 372-383
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSAs the result of an observation on the elongating process of leaf blade, leaf sheath, panicle and internode in all over the growing period of rice plant, a regularity of development was recognized among those organs, and a problem was proposed that the regularity is due to the constitution of vascular bundles and its ripenning process in the culm. By the way, the meristem concerning with the culm formation were studied by histological methods, with special reference to the intercalary meristem of internode.View full abstractDownload PDF (4300K) -
Harunosuke KAWAHARA, Kiyoshi WADA1968 Volume 37 Issue 3 Pages 384-393
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe process of the formation of epidermis and cortical fiber in the culm of rice plants was observed by histological methods. The eidermis has the zones of cell division, differentiation and elongation at the base of every internode, and the width of these zones alternates through the elongating period of each internode. Though the epidermal cells of lower internodes are shorter than those of higher internodes, the lower internodes have many longer and thicker cortical fiber cells than the higher internodes. It is due to the sliding growth by which the cortical fiber cells elongate vigorously in the lower internodes particularly. It was observed in general that the cortical fiber cells take about thirty days to make up the secondary cell wall after the end of each cell elongation.View full abstractDownload PDF (3468K) -
Genshichi WADA1968 Volume 37 Issue 3 Pages 394-398
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn a field experiment long-term varieties yielded greater total dry weight than short-term varieties but had similar dry weight of ear and grain yield to short-term varieties except a few treatments, and the dry weight ratio of ear to shoot or grain yield to total dry weight was greater for short-term varieties than for long-term varieties at maturity. A positive correlation coefficient was found between the dry weight ratio of ear to shoot at maturity and the ratio of dry weight produced after ear emergence to dry weight at ear emergence, number of spikelets per unit dry weight at ear emergence, RGR. or NAR. during ripening stage. A negative correlation coefficient was found between the dry weight ratio of ear to shoot at maturity and dry weight at ear emergence or number of days from transplanting to ear emergence. These facts might be ascribed to that the weight of ear was determined by the amount of dry matter produced after ear emergence or the number of spikelets and that there was no definite relation between dry weight produced after ear emergence or number of spikelets and dry weight at ear emergence, in case of varieties and transplanting dates being different.View full abstractDownload PDF (691K) -
Harunosuke KAWAHARA, Nobuo CHONAN1968 Volume 37 Issue 3 Pages 399-410
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe mechanism of water conduction in the elongating vascular bundles was clarified with a histological observation on the maturing process of vascular bundle in the culm of rice plants. On a same horizontal plane, the first sieve tube of protophloem matures two days before the maturation of the first vessel of protoxylem in a large vascular bundle, which has in general about six protoxylem elements. During the period of elongation of each internode, old vessels and sieve tubes are destroyed, but new vessels of protoxylem and new sieve tubes of protophloem are formed one after another, and then, the elongating internode has always one or two active vessels and several active sieve tubes. The two vessels of metaxylem begin to work one or two days after the end of elongation. The tenth leaf, for example, is connected closely with the eighth leaf through the system of vascular bundles. When the eighth leaf has expanded entirely, the first elements of protoxylem and protophloem mature in the leaf traces between the two leaves, and the tenth leaf begins to grow rapidly at the same time.View full abstractDownload PDF (3473K) -
Noriyuki TANAKA1968 Volume 37 Issue 3 Pages 411-416
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESS1. The root system in legumes consists of different kinds of roots developed from various other organs in addition to the main root according to the kinds of crops and the way of cultivation. The author, therefore, considered it is necessary to classify and observe these roots of each group in order to make the study of root system formation easy and clear. Eleven species were used as materials in the present study. From this point of view, the author classified these roots according to their organs where the roots shot out as follows : (1) Main root system (2) Hypocotyl root system (3) Stem root system 2. Main root system is formed by roots shot out from the main root and it occupies usually great part of the whole root system in many sorts of leguminous crops. Hypocotyl root system is formed by roots originated from the both parts of hypocotyl and epicotyl. And these are frequently recognized even if it is under ordinary cultivation. Especially in case of mulching it is evidently promoted and frequently exceeds the main root system. Stem root system is the general name of the roots shot out from the parts except main root, hypocotyl and epicotyl. 3. The discrimination between the main root system and hypocotyl root system is practically difficult since there is no node in the plant body differenciating these two organs. On this subject, the author observed morphorogically this border comparing with following factors : (1) Occurrence of root hair (fig. 2) (2) Size of cells in epidermis and cortex (fig. 3) (3) Relation between the transition region of the primary vascular bundle and position of the first "branched-secondary root" (fig. 4, 6). 4. As a result in epigeal plants, the author recognized that the border position descriminated by the occurrence of root hairs coincided almost with other factors, (2) and (3) mentioned above. Judging from this fact, when we separate the border practically it is better to take up the initial secondary root as an indicator because it shows greater growth in branching, thickening and nodule formation comparing with hypocotyl roots. But in hypogeal plants, we can't observe that the border decided by the occurrence of root hairs does not coincide with other factors, (2) and (3). The author, therefore, decided to distinguish them by the cotyledonary node.View full abstractDownload PDF (1342K) -
Genshichi WADA, Seizo MATSUSHIMA, Akio MATSUZAKI1968 Volume 37 Issue 3 Pages 417-423
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe relation between nitrogenous nutrition and the components of the number of spikelets per unit area was investigated and obtained the following results. 1. The number of panicles and primary rachis branches per unit area was mainly affected by the amount of nitrogen absorbed by the time of neck node differentiation, and little affected by the amount of nitrogen absorbed after the time of neck node differentiation. 2. The number of secondary rachis branches was mainly affected by the amount of nitrogen absorbed by the time of late spikelet differentiation, except the cases where an abnormally large number of spikelets were degenerated by the abnormal climate or an extremely large amount of nitrogen was absorbed in the reduction division stage. And at heading time, in general, the number of secondary rachis branches was correlated with the amount of nitrogen absorbed by heading time. 3. The relation between the number of spikelets per panicle and the amount of nitrogen absorbed by rice plant was similar to the relation between the number of secondary rachis branches per unit area and the amount of nitrogen absorbed by rice plant. 4. In treatments which were nearly equal in the number of spikelets per unit area, the more amount of nitrogen absorbed by the time of neck node differentiation were the more number of panicles and primary rachis branches per unit area, but the less numder of secondary rachis branches per unit area and number of spikelets per panicle. 5. Nitrogen contents in leaf blades in each stage did not directly affect the components of the number of spikelets per unit area, but only in cases where the nitrogen contents were correlated with the amount of nitrogen absorbed the nitrogen contents affected the components of the number of spikelets per unit area.View full abstractDownload PDF (777K) -
Noriyuki TANAKA1968 Volume 37 Issue 3 Pages 424-429
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESS1. Anatomical studies were carried out upon the vascular differentiation in hypocotyl and main root mainly from the view point of root origination in leguminous crops. Ten species of epigeous dicotyledons and four species of hypogeous ones were used as materials in this study. 2. The root xylem of all the species shows various types from diarch to hexarch (fig. 1). Above all, two kinds of tetrarch and pentarch were observed in Vicia faba L. (fig. 1-9, 10) and also tetrarch and hexarch in Phaseolus vulgaris L. (fig. 1-4, 5). The triarch crops were found in the hypogeous group (fig. 1-11, 12). 3. The raws of secondary root were observed in the same number of xylems inside around the main root because the root primordia were formed by division of pericyclic cells opposite to the protoxylem. 4. As to the differentiation of vascular bundle system, a moderate degree of difference existed between the epigeal type and hypogeal one. (1) In epigeous dicotyledons, transition of bundles occurred and completed at the lowest part of the hypocotyl where perfect collateral bundle was recognized. Vascular bundles of lupine, peanut and soybean were seen to branch in the hypocotyl and the number of bundles, therefore, increased gradually (fig. 3-1, 2, 3, ). (2) In hypogeous dicotyledons, the transition region is comparatively long and extends to the upper first internode or second internode and the arrangement of vascular bundle as in root was still found in the hypocotyl (fig. 5-1, 2, 3). 5. In case of collateral bundle the adventitious roots originated in the interfacicular parenchyma and in case of imperfect collateral bundle in the transition region, it originated from the parenchyma laid among the phloems.View full abstractDownload PDF (1570K) -
Kazuo NAGATO, Husazi NISHIO, Ziro SATO1968 Volume 37 Issue 3 Pages 430-435
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe irrigation water in this district is often contaminated by sewage from residential places and drainage from manufactories. The irrigation water contaminated by sewage from residential places, affects the ripening of rice adversely, through high concentration of nitrogen which it contains and hence causes the occurence of sterile, abortive and opaque kernels, The irrigation water contaminated by drainage from manufactories, deoxidises the paddy soil by various reducing substances contained in it and ultimately does harm to the root of rice plant and is also injurious to the ripening of kernels causing the occurence of opaque and basal-white kernels.View full abstractDownload PDF (785K) -
Masao TANAKA1968 Volume 37 Issue 3 Pages 436-441
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSExperiments were conducted to reveal the influence of OED-treatment on the dimension of intercellular spaces and the colour of flue-cured leaves. 1, 2, 8 and 25 days before priming, upper and lower surfaces of half side of the fresh leaves were sprayed with a 1/20 solution of 'OED Green', a transpiration suppressant, and those of the other halves were kept without treatment. In the OED-sprayed halves, dimensions of intercellular spaces estimated by alcohol lesion method were obviously smaller than those in the non-sprayed ones. This effect appeared on the next day of the spraying and this decreased state persisted for 25 days at least. To find the cause of the decrease of intercellular spaces, several cut blades, each of which contained a side vein, were put into the glass bottles which had been filled with CO2, O2 and air respectively and kept them in the room temperature around 30°C for 14 hours. The dimension of intercellular spaces of the blades which had been subjected to CO2, decreased obviously in comparison with those which had been kept in the air. In case of the O2 treatment, however, the result was vice versa. On these basis, it is provable that the development of intercellular spaces is widely controlled by O2 pressure in the leaf system. Samples of flue-cured leaves of various grades (1st-5th grades) were rearranged into 3 groups according to the colour ratio between upper and lower sides of the leaves. Intercellular spaces in the leaves having least or inermediate colour differences were larger than in those with intermediately or most different ones. Average grading values of the leaves of the above cited 3 groups were 1.0, 2.5 and 3.8 respectively. In the OED-sprayed leaves, dominant wave length and excitation purity were obviously larger than those in the non-sprayed leaves approaching to the character observed on the leaves from U. S. A. The differeaces of spectral reflectance between non-sprayed and OED-sprayed leaves were measured on both sides of the surface. The result revealed that in both surfaces, non-sprayed leaves showed larger differences than the sprayed ones especially at the wave length ranging from 533 to 612 mμ. This means that the spraying with OED reduces the green shade of the cured leaves. From these facts, we may draw a conclusion that spraying with a dilute solution of OED will work toward reducing both the green shade of the leaves and the colour differences between upper and lower sides and, moreover, producing orange type of leaves with high excitation purity.View full abstractDownload PDF (878K) -
Shin-ichiro KAWATA, Aiya ISHIHARA, Shoichi TSUNODA1968 Volume 37 Issue 3 Pages 442-446
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDuring the course of the previous studies on the nutrient medium for the culture of excised roots of rice, it was repeatedly observed that these excised roots showed a remarkable variation in their growth even with the same nutrient medium. Since this variation was considered as an obstacle for further studies, investigations were carried out in order to clarify this situation. The explants were obtained from the seedlings of rice, variety Noorin No. 29, germinated aseptically under well-controlled as well as semi-controlled temperature. Throughout the studies, the 1cm root tips used to initiate experiments were excised from seminal roots and were cultured with the "improved medium" reported previously. All the cultures were maint-ained at about 27°C in the dark for the periods from half to one month, until the root growth ceased. A series of cultures, from November 1963 to October 1964, were performed using the rice seeds harvested in the Autumn of 1963. The results of these cultures showed a seasonal fluctuation in root growth ; the roots cultured in winter months grew definitely longer than those cultured in spring and summer months. Maximum elongation of roots in each cuture was almost within the range of 13 to 22 cm in winter cultures and 8 to 13 cm in spring and summer cultuers. On the basis of the above data, it was of interest to study the factor (s) involved in this seasonal fluctuation of root growth. In order to elucidate this, the authors carried out the following experiments. In the first experiments on the effect of various controlled temperature, at the time of seed germination, upon the root growth in cultures, it was found that the growth of excised roots was hardly influenced by the germination temperature. In the second experiments on the relation between the length of seminal roots, at the time of excising root tips, and the growth of excised root tips (1cm), it was found that the growing stage of the seminal root at the time of excision affected the growth of excised root tips in culture. At last, it was thought that the age of seeds might affect the growth of seminal root tips in culture. Accordingly, a number of comparisons were made between the growth of excised roots derived from the seeds harvested in the autum of 1963 and those harvested in the autum of 1964. The results of these experiments showed that the growth of excised roots derived from "new" seeds exceeded distinctly that of excised roots derived from "old" seeds. Furthermore, a series of cultures, using the seeds harvested in the autumn of 1964, were performed. In this experiment, root tips were excised from 1.5 cm seminal roots (at the same growing stage) and were cultured as mentioned above. In these cultures, again, the root growth showed a remarkable seasonal fluctuation. This phenomenon might be due to the aging of seeds. From these experiments, it may be concluded that there are at least two factors responsible for the variation in the growth of excised seminal roots; the growing stage of seminal root at the time of excising the inoculum and the age of seeds used.View full abstractDownload PDF (673K) -
Shin-ichiro KAWATA, Aiya ISHIHARA, Shoichi TSUNODA1968 Volume 37 Issue 3 Pages 447-453
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe seminal roots with various tissues of the caryopsis, whole seminal roots and 1cm long seminal root tips of rice, variety Noorin No. 29, were cultured with several kinds of media. On the medium containing only White's inorganic salts plus 6.0 percent sucrose, the seminal roots with scutella (Fig. 1, ii) showed very good growth (about 50-60 cm in root length). On the other hand, the seminal roots with scutella were cultured by adopting the manner of feeding sucrose from the side of scutellum in small vial and inorganic salts through the root in flask (Fig. 2). In these cultures especially in the case of A type culture, it was found that the seminal roots grew more than 100 cm (with the maximum of 152 cm in the case of A type culture), when the concentration of sucrose was raised to 12.0 percent. These results suggest that culture of the seminal root with scutellum by using A type culture is a useful method for studies on the physiology and morphogenesis of rice roots.View full abstractDownload PDF (903K) -
[in Japanese]1968 Volume 37 Issue 3 Pages 454-456
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
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[in Japanese]1968 Volume 37 Issue 3 Pages 456-457
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (444K) -
[in Japanese]1968 Volume 37 Issue 3 Pages 458-459
Published: September 10, 1968
Released on J-STAGE: February 14, 2008
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