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Volume 62, Issue 1
Displaying 1-22 of 22 articles from this issue
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Tatsuhiko SHIRAIWA, Ushio HASHIKAWA1993 Volume 62 Issue 1 Pages 1-8
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSField experiments were conducted in 1989 on a converted paddy field at Shiga Agricultural Experiment Station (Azuchi, Shiga Prefec.), and in 1990 on an upland field at Shiga Prefectural Junior College (Kusatsu, Shiga Prefec.), in order to investigate stability of efficiency of intercepted photosynthetically active radiation conversion in the accumulation of dry matter (EPAR) by soybean and determine factors which might affect EPAR. In 1989, cultivar 'Enrei' was sown on 3 different dates in various planting patterns, and in 1990, cultivar 'Tamahomare' was grown at various plant population densities. The intercepted PAR and the top dry matter accumulation were in quite close relationship. But it was not always linear over the whole growth duration. EPAR increased in the early growth stage, then, approximately after the canopy closure, it was kept relatively stable or increased slightly until early grain filling period when EPAR began to decline. This time course of EPAR was considered to be resulted primarily from the change of crop photosynthetic activity. But in addition to that, the greater portion of light-saturated leaves at the early stage and the increasing maintenance respiration at the late growth stage also might cause lower EPAR at those stages respectively. Since almost all EPAR values calculated for the period through which those were observed to be stable, were within a small range, from 2.1 to 2.3gMJ-1 in 1989 and from 2.4 to 2.5gMJ-1 in 1990, respectively, due to sowing dates and planting patterns, it was concluded that the ability of dry matter production of soybean crop was not affected considerably by those conditions. Within the small variation of EPAR caused by different planting patterns in 1989, EPAR showed no correlation with N content per unit leaf area, while it showed relatively clear correlation (r=-0.651) with canopy light extinction coefficient KPAR.View full abstractDownload PDF (889K) -
Tohru KOBATA, Kenji SHIONO, Toshiaki TAKEI, Atushi KATUBE, Tadashi IMA ...1993 Volume 62 Issue 1 Pages 9-16
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSBecause the leaf water potential (Ψ1) of the rice plant (Oryza sativa L.) is strongly affected by the evaporative demand of the atmosphere under paddy field conditions, and most changes in Ψ1 reflect variations in evaporative conditions, we can not directly compare seasonal trends of Ψ1 in terms of phenological changes of water status of the plant. Our objective was to determine whether the ability to maintain high Ψ1 under paddy field conditions changes with growth stage independent of atmospheric conditions. Maintenance ability was determined by calculating the slope of the regression line between the evaporation rate from a wet filter paper (E0) and Ψ1 over a 24 hour period. This technique was chosen because there were close relationships between E0 and Ψ1 within a day, and the slope of the regression line (S) can be considered to indicate the sensitivity of Ψ1 to the evaporative demand of the atmosphere. A three year experiment was conducted at two locations in East Shimane Prefecture using three rice cultivars ; the two locations were Matsue, less than 17m above sea level, and Akana, at 444m. For the first group (Matsue), S was moderate between the stages of transplanting and formation of young panicles, but became significantly steeper during the grain filling stage. In the second group (Akana) S followed the same trend before the grain filling stage, but then continued to be maintained moderately until the end of the season-this applied both to the plants at Akana and to late planted samples at Matsue. Both of these latter sets of samples were subject to different growing conditions from the norm, especially lower temperatures during grain filling than what would be normal at Matsue. We concluded that maintenance ability of Ψ1 in rice plants changes with growth stage, but this ability may vary, particularly in the grain filling period, as a result of growing conditions.View full abstractDownload PDF (895K) -
Tohru KOBATA, Kenji SHIONO, Toshiaki TAKEI, Atushi KATUBE, Shinichiro ...1993 Volume 62 Issue 1 Pages 17-26
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe observed previously (Part 1) that maintenance ability of leaf water potential (Ψ1) in rice plants under paddy field conditions changed depending on planting years and seasons and individual locations, when maintenance ability was calculated by the slope (S) of a regression line between Ψ1 and evaporation rate (E0) measured with a wet filiter paper. Our objective was to establish whether there is a relationship between grain yield and S for the cultivar Nipponbare grown in a three-year experiment conducted at two locations. Maximum grain yield was 695g/m2 and lowest yield was 436g/m2. Efficiency of radiation energy use for grain yield (UEG-indicated by the ratio of grain yield to accumulated short wave radiation, or to hours of sunshine) both during the whole growing season and the grain filling period, were different for each year, season and location. When a mean value of S for 60 days (from -30 to 30 days after heading, S^-) was calculated as an indicator of the maintenance ability of Ψ1 at a dominant period of yield determination, there were close relationships between UEG and S^-. The maintenance ability of Ψ1 during spikelet initiation (from -30 to 0 days after heading) seemed to contribute significantly to high UEG. This conclusion can be drawn firstly because the grain yield was limited by the number of spikelets which had been initiated since 30 days before heading, and secondly because spikelet number appeared to be affected by S during the spikelet formation stage. It may be possible to use S at the mid grain filling period (S20) as an indicator of the magnitude of UEG, since S20 was shown to have a dominant effect on S^-. Our data suggest that rice which has a greater ability to maintain high Ψ1 for most of the season under wet soil conditions is capable of efficient use of solar radiation in the production of grain.View full abstractDownload PDF (1073K) -
Kiyoshi TAKAHASHI, Hiroyuki OTAKE1993 Volume 62 Issue 1 Pages 27-32
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe studied how the tiller axes move toward the upright positon using one of the Japonica type rice Sasanishiki (Oryza sativa L.). In the first trials, each plant was grown in a pot. The tiller shoots were sampled at the 11th leaf-stage and at 10 days after the panicle heading. The curvature of each pulvinus was measured and indicated as a degree angle. Maximum angle of 28.4 degrees was found in the pulvinus positon 0 located at the base of a lowest internode among elongated internodes in the tiller stem. Then, the curvature of each pulvinus at the positon -1, +1 and -2 was 14.0, 12.7 and 10.9 degree angle, respectively. The curvature of the lower primary tillers of a main stem was greater than those of the upper tillers. The number of pulvini curvatured was also greater in the lower ones. This shows that pulvini of the lower primary tillers were successively responding to gravity more than one time and restored their shoots to the upright position. Almost the same results are obtained in the field experiment where the seedlings were transplanted at the rate one per hill and 5 per hill in both the space of 30×30 cm and 30×15 cm, respectively. In conclusion, it was found that the pulvini at and around the position 0 plays an important role to allow tiller axis to move into the upright position.View full abstractDownload PDF (683K) -
Osamu KUSUDA1993 Volume 62 Issue 1 Pages 33-40
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDry weight of rice plant is an important character for the vegetative diagnosis and growth forcast of this plant. However, it requires a long time and much labor to precisely estimate the dry weight, which makes the survey difficult. Accordingly, it is necessary to establish a new survey method effective in laborsaving while maintaining precision of a definite level or above. In this report, the sample size, precision and necessary time in a survey on dry weight by double sampling and ratio estimate were examined and analyzed so as to discuss the efficacy. When fresh weight was employed as an auxiliary variable, the time required for obtaining an estimation of precision comparable to the one obtained by using simple random sampling was shortened, which suggested that it was effective in laborsaving. When the number of tiller and the number of panicle obtained by stand observation were employed as auxiliary variables, it was advantageous that the number of hills to be taken from fields in practice could be decreased, compared with simple random sampling, though the degree of laborsaving was somewhat lowered. Further, the precision and necessary time in various dry weight survey methods, in which the fresh weight, the number of tiller and the number of panicle of 20 hills were employed as an auxiliary variable, were examined and analyzed to thereby clarify a survey method effective in laborsaving.View full abstractDownload PDF (892K) -
Makoto TSUDA, Shinichi TAKAMI1993 Volume 62 Issue 1 Pages 41-46
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSExperiments were conducted to examine whether the responses in panicle water potential under drought changes with panicle development. Twenty seedlings of two rice cultivars, Norin 20 and Milyang 23, were grown in a 4-liter pot under submerged-soil conditions. Tillers being removed weekly, only main culms were subjected to drought treatment. The treatment was imposed by withholding water at the different stages of panicle development : the spikelet differentiation stage in Norin 20, and the panicle differentiation stage, the meiosis stage and the earLy stage of grain growth in Milyang 23. Before heading the water potential of panicles changed little diurnally whereas it fluctuated markedly in concert with change in the potential evapotranspiration after heading. The decrease in panicle water potential during drought treatment was much less at the meiosis stage than at the earlier stages. Regardless of the developmental stage, the water potential of the panicles was lower than that of the soil when the soil was moist. With the increase of drought, the panicle water potential approached the soil water potential. These results suggest that water potential of panicles responds to transpiration under drought similarly as under submerged-soil conditions. The panicle water potential is also affected by drought through water flux for growth. Furthermore, during the meiosis stage the panicle undergoes a slower decrease in water potential probably due to its higher resistance to and/or capacitance of water flux.View full abstractDownload PDF (691K) -
Hideki SUGIMOTO, Tooru SATOU1993 Volume 62 Issue 1 Pages 47-52
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe purpose of this experiment was to examine whether the application of nitrogen (N) fertilizer as ammonium sulfate is an effective countermeasure against excess moisture injury of soybeans [Glycine maz (L.) Merr.]. Soybeans (cv. Tamahomare) were grown in an upland field converted from paddy. Flooding treatment was conducted in furrows to a depth of 5 to 8 cm for 8∼11 days at flower-bud differentiation stage and subsequently fertilizer was applied at the rate of 12 g N per m2. In the flooding plot without supplemental N, seed yield decreased by 20% ; however, in the flooding plot with supplemental N, seed yield decreased only by 6%, since the decreases in pod number were low. The reasons for the low reduction in pod munber were examined in a pot-cultured experiment. Plants under excessive soil moisture and without supplemental N had low N content in the leaf blade which brought about a marked decrease in the photosynthetic rate. In contrast, supplemental N increased the N content in the leaf blade and photosynthetic rate. It was assumed that the increased photosynthetic rate by supplemental N inhibited bud, flower and pod shedding.View full abstractDownload PDF (763K) -
Tomio WATANABE1993 Volume 62 Issue 1 Pages 53-59
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSFor the purpose of improving the deep irrigation method as a countermeasure of floral impotency due to cool weather by means of a reduction of the necessary water depth to protect young panicles, studies were conducted on the effect of growth retardants (Inabenfide, Uniconazole, Paclobutrazol) and a fungicide (IBP) on the height of young panicle and on sterility due to cool temperature at the booting stage. The results were as follows : (1) The height of the young panicles was reduced in every chemical treatment. The degree of reduction was greatest for lnabenfide, followed by Paclobutrazol, IBP, and Uniconazole. These reductions in the height of the young panicles were in agreement with the reduction of the peduncular internode and the next. (2) With the reduction in the height of the young panicles above the soil surface, the necessary water depth needed to cover about 80% of the cool-susceptible spikelets was reduced by about 6cm for lnabenfide, 4.5cm in Paclobutrazol, 3.5cm in IBP, 3.0cm in Uniconazole from the check, in which the necessary water depth was 22.5cm in the transplanting culture of young seedlings "Hatuboshi". (3) The treatments with the chemicals except IBP did not reduce significally the percentage of sterility due to 15°C constant temperature for 4 days at the booting stage in comparison with the check, in the pot experiment.View full abstractDownload PDF (822K) -
Makoto TSUDA, Yuji YAMANE, Shinichi TAKAMI1993 Volume 62 Issue 1 Pages 60-65
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDecrease of panicle weight per plant in rice in proportion to cumulative water stress (an integrated estimate of the degree and duration of water stress) has been demonstrated in rice subjected to increasing water stress imposed at the early stages of panicle development. Since yield decrease under drought is proportional to yield without drought, it was expected that the decrease of panicle weight per plant by a unit change of cumulative water stress might be proportional to panicle weight per plant under submerged soil condition. To prove this hypothesis, we conducted an experiment in which the relationship between panicle weight per plant and cumulative water stress was examined. Two rice cultivars, one wetland (Koshihikari) and another dryland (Sensyou), were grown in pots differing in their size and fertilizer level. The plants were subjected to different water treatments started either at the stage of the secondary-branch primordia differentiation or at heading and anthesis. Control plants were kept continuously submerged. The decrease in panicle weight per plant under drought was proportionally related to the cumulative water stress in plants subjected to water stress during heading and anthesis as was during early stages of panicle development. The linear regression coefficient between the panicle weight per plant and cumulative water stress was also proportional to the panicle weight per plant under submerged condition. In other words, the panicle weight per plant under water stress G (g plant-1) can be related to the cumulative water stress CWS (MPa·day) by : G=Go (1-K·CWS), where Go is the panicle weight per plant under submerged condition (g plant-1) and K is the constant defined as water stress susceptibility (MPa-1day-1).View full abstractDownload PDF (662K) -
Shigemi AKITA, Byun Woo LEE, Tetsuya ISHIKAWA, Qian LI1993 Volume 62 Issue 1 Pages 66-72
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSVariation of the specific rate of average night dark respiration (Rs-n) expressed as mgCO2 g dry wt. -1h-1 of individual plant was examined in semi-dwarf high-yielding indica, F1 hybrids and japonica cultivars grown in the field under favorable management to clarify the causal factors for the variation of the dark respiration rate in the later growth stage (from around heading to maturity) of rice. The Rs-n was the highest around heading stage and the Rs-n gradually decreased with the advance of growth stage in a quadratic manner. Besides, Rs-n was linearly related with both nitrogen content and solar radiation of sampling day. The correlation coefficient of the multiple regression analysis on the effect of these three factors on Rs-n was 0.831. Varietal difference in the dark respiration rate was not large. Particularly, little variation of the dark respiration rate of leaves was observed among materials used in spite of the remarkable difference in sugar content. Variation of Rs-n with different growth stage was mainly due to the change of weight ratio of the composing organs to the total dry weight and to the change of specific respiration rate of composing organs. The respiration rate per nitrogen (Rs N-1) of the leaf increased during ripening stage, while those of other organs decreased.View full abstractDownload PDF (755K) -
Shigemi AKITA, Tetsuya ISHIKAWA, Byun Woo LEE, Katsuyuki KATAYAMA1993 Volume 62 Issue 1 Pages 73-80
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSVariation of the specific rate of dark respiration (mgCO2 g dry wt. -1h-1 measured at 29°C, Rs) with the age of the tissues and organs of rice cv. Suweon 258 and Nona Bokra, grown in the favorable field condition was measured and causal factors for the variation of Rs were studied. The leaf Rs excised 2 hours after darkening was higher by approximately 50 per cent than that excised after 15 hours after darkening when Rs was measured at 15 hours after darkining. The Rs of panicle and sheath excised at 2 hours after darkening was slightly higher than the ones excised after 15 hours after darkening when measured in the same conditions. The Rs of excised young developing tissues of various organs showed remarkably higher rate just after darkining and decreased almost linearly with time and rhythmic variation of Rs was hardly observed. On the other hand, those of excised mature tissues were lower and clear rhythmic variation of Rs characterized with higher rate early in the morning and often called "morning rise" was observed. The variation of Rs of young tissues was related to the sugar content during the measurement in a hyperbolic manner and it was also linearly related with nitrogen content. These results indicate that the relation between nitrogen and sugar content and Rs of the young developing tissues can be fundamentally simulated by the modified Michaelis-Menten equation. However, the Rs of older tissues did not fit to the above equation.View full abstractDownload PDF (903K) -
Hiroyuki OTAKE, Kiyoshi TAKAHASHI1993 Volume 62 Issue 1 Pages 81-87
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSGravitropic response of each pulvinus and their interaction in rice stem was studied using deepwater cultivar, Hebiganj Aman 8 (HA) and japonica cultivar, Sasanishiki. Almost same results were obtained in both cultivars ; therefore, the results obtained with HA are indicated here. Exp. 1 : Both of intact plants and excised stem sections including three succesive pulvini responded to the gravity in almost same manner. Then we used stem sections in the following experiments. Exp. 2 : In all three pulvini, gravitropic curvature was started within a few hours after the stem sections were placed horizontally and finished their response after 42 hours. Exp. 3 : One of the pulvini in stem segment placed horizontally was physically fixed with a plastic straw to prevent the action of curvature of that pulvinus. The degree of curvature of the upper pulvinus was increased when the lower pulvinus was fixed. However, curvature of the lower pulvinus was not increased when the upper pulvinus was fixed. Exp. 4 : Each individual pulvinus was separated from the stem and again jointed with plastic straws so as to make a stem with each 5 mm spaces among the three pulvini. Then the stem was placed horizontally. Degree of the total curvature was near 90 degrees when the upper, youngest pulvinus was inserted at the uppermost position. However, the total curvature exceeded 90 degrees when the lowest, oldest pulvinus was placed at the uppermost position. In conclusion, it is shown that rice leaf pulvinus responds to gravity independently from other pulvini in an elongated stem.View full abstractDownload PDF (840K) -
Tadashi TAKAHASHI, Kimio NAKASEKO1993 Volume 62 Issue 1 Pages 88-94
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTo evaluate the response of sowing time on partitionings to leaf blade, ear and grain in spring wheat, the regression formulas for these partitionings against days after emergence and developmental index were calculated in four growth phases. Data was from a field experiment with three sowing times at two week intervals for three varieties. In growth phase I, from emergence to double ridge stage, the partitioning to leaf blades, Yl, was evaluated by the regression formulas, Yl1=b1X+c1 against days after emergence (X) and Yl1=B1X+C1 against developmental index (X). The coefficient b1 was higher with later sowing time. Shortening of this phase duration with later sowing did not cause this increase of b1, because the coefficient B1 was also higher with later sowing. In growth phase II, from double ridge stage to flag leaf emergence, the partitioning to leaf blades, Yl, was evaluated by regression formulas, Yl2=-b2X+c2 against days after emergence and Yl2=-B2X+C2 against developmental index. The coefficient b2 was lowest with early sowing for all varieties. Long duration of this phase with early sowing resulted low b2 value, because the coefficient B2 showed a different tendency with b2. In growth phase III, from flag leaf emergence to anthesis, the partitioning to ear, Ye, was evaluated by regression formulas, Ye=-a3(X-b3)2+c3 against days after emergence and Ye=-A3(X-B3)2+C3 against developmental index. As sowing time was later, the shape of the regression curve was narrower and more acute because of secondary coefficient a3 and higher constant c3. This difference in shape of the regression curve was not due to a difference in phase duration, because the coefficient A3 and the constant C3 were highest with late sowing, in contrast to a3 and c3. In growth phase IV, from anthesis to milk ripe stage, the partitioning to grains, Yg, was evaluated by a regression formula against days after emergence, Yg=b4X-c4. However this regression did not fit this relation, because the correlation coefficients were low. The results indicated that grain has a fixed growth rate, while the increase rate of culm reserved material altered depending on the influence of radiation.View full abstractDownload PDF (782K) -
Hiromi KANO, Nobuaki ISHIDA, Hidejiro TAKAGISHI, Kazuto SHIRATA, Mika ...1993 Volume 62 Issue 1 Pages 95-104
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSEffects of Na+ on morphology, phosphate metabolism and accumulated compounds of sugar beet root were studied by 1H-NMR imaging, and 31P-, 23Na- and 13C-NMR. 23Na-NMR showed that Na+ concentration of the sugar beet root reached 9.2 mM in the medium containing 180 mM NaCl. Broadening of 31P-NMR signal of vacuole-associated inorganic phosphate upon addition of Na+ suggests that the sugar beet root cells are furnished with the mechanism that alleviates the injurious effect of Na+. Strong water signal was observed in epidermal and vicinal cells, and around vascular bundles in 1H-NMR images, which was reduced by Na+ treatment. Based on 1H-NMR images and pictures of tetranitro blue tetrazolium (TNBT) staining, water was located in tissues with metabolically active cells. 13C-NMR spectra of 80% ethanol extracts of sugar beet roots showed accumulation of sucrose, betaine and glutamine. Extra accumulation of sucrose and betaine in parenchyma cells by Na+ treatment resulted in the reduction of active cells. Since Na+ treatment suppressed enlargement of sugar beet roots, the plant did not acquire resistance to grow against strong salt stress by long-term acclimation, though the results of this investigation showed that the plant is, by nature, tolerant to salt stress.View full abstractDownload PDF (997K) -
Motoyuki HAGIWARA, Mitsuo IMURA1993 Volume 62 Issue 1 Pages 105-110
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSLocal soil-reduction occurs around rice seed when it is sown into flooded soil, and the reduction inhibits seedling emergence. Seedling emergence is more inhibited when the reduced soil area is formed earlier and becomes larger. Varietal difference and temperature response of local soil-reduction were investigated. Seed was exposed to local soil-reduction around it for a longer period before germination at 17°C than at 20°C. Although the reduction at 17°C proceeded about half as slow as that at 20°C, reduced area size around the time of germination at 17°C was not conspicuously smaller than at 20°C. Thus, the influence of reduction on seedling emergence was supposed to be stronger at lower temperature. This seemed to be closely related to the poor seedling emergence at low temperature. On the other hand, as germination percentage of each variety was much the same between 17°C and 20°C, it seemed to be less susceptible to local soil-reduction compared with seedling emergence percentage. Varietal difference was observed in the course of soil reduction around a seed ; however, neither positive correlation between reduced area size and germination percentage nor negative correlation between reduced area size and seedling emergence percentage were significant. Thus, it was suggested that not only reduced area size but also Eh and tolerance to soil reduction was concerned in the expression of varietal difference of seedling emergence.View full abstractDownload PDF (654K) -
Keo INTABON, Morio KATO, Katsu IMAI1993 Volume 62 Issue 1 Pages 111-115
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTo clarify the effect of seed-rhizome weight at planting on the vegetative growth and yield of new-rhizomes in edible canna, seed-rhizomes weighing 20-500g (fresh weight) were planted at 1.0m×0.5m spacing and cultivated in the experimental field of the University of Tsukuba, Ibaraki, Japan. Shoots from the heavier seed-rhizomes required fewer days to emerge from the soil and had more rapid growth and greater yield than shoots from the smaller seed-rhizomes. However, this tendency did not continue for the seed-rhizomes weighing more than 200g. Therefore, it is concluded that the appropriate weight of seed-rhizome for practical cultivation is about 200g.View full abstractDownload PDF (497K) -
Katsumi SUZUKI, Hiroshi MIYAKE, Takeshi TANIGUCHI, Eizo MAEDA1993 Volume 62 Issue 1 Pages 116-125
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSCell ultrastructure was examined in rice embryos at the developmental stage between 42 and 72 HAA (hours after anthesis). Until 48 HAA, the cells gradually became cytoplasm-rich with a slight increase in the volume of the embryo exhibiting a globular shape. The globular embryo consisted of two parts : an embryo proper which was spherical in shape and a suspensor situated toward the micropylar end. From 48 to 66 HAA, cells of the embryo proper attained a very meristematic profile with vacuoles becoming small and few in number. On the other hand, in the suspensor region, cells and their vacuoles were larger than those of the embryo proper. Until 66 HAA, the absence of cuticular layer on the surface of globular embryo was ascertained since no materials reactive to the I2KI-H2SO4-AgP method were observed. At 72 HAA, however, a stable layer of cuticle began to appear on the surface of the embryo, extending from the ventral side and gradually covering the entire embryonal surface. Simultaneously, cell differentiation occurred in the internal tissues accompanied by ultrastructural changes. It was concluded from these results that the initiation of a cuticular layer is one of the first cytological events that lead rice embryos to organogenesis.View full abstractDownload PDF (2545K) -
Tadahiko FURUYA, Teruhisa UMEZAKI1993 Volume 62 Issue 1 Pages 126-127
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (377K) -
Tomikichi WADA, Hiroshi MIYAKE, Hiroaki SUZUKI, Katumi SUZUKI, Yoji TA ...1993 Volume 62 Issue 1 Pages 128-129
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (388K) -
Tetsuya ISHIKAWA, Shigemi AKITA, Qian LI1993 Volume 62 Issue 1 Pages 130-131
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (342K) -
Kihachi UENO, Tadashi SATO1993 Volume 62 Issue 1 Pages 132-133
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (317K) -
Kazuyuki SAITOU, Waichi AGATA, Masae ASAKURA, Fumitake KUBOTA1993 Volume 62 Issue 1 Pages 134-136
Published: March 05, 1993
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (412K)
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