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Volume 27, Issue 3
Displaying 1-13 of 13 articles from this issue
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Kikuo WASANO, Satoru ORO, Yasuhiro KIDO1983 Volume 27 Issue 3 Pages 131-139
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThe syringe method was newly adopted as an easy and reliable technique for selecting the rice plants resistant to sheath blight, Rhizoctonia solani. The method was as follows : 1) the fungus was cultured on PSA medium at 28°C for 2 days, 2) about 0, 25 ml aliquot of crushed agar culture was injected into the 3rd leaf sheath interstice at heading stage, and 3) in order to evaluate the resistant level of plants to sheath blight, the ratio of areas of disease lesion to that of total leaf sheath (disease scores) was used on 2 and 4 weeks after inoculation ; the most effective evaluation of the resistance level to the disease was made by reading the disease scores on the 2nd leaf sheath on 4 weeks after inoculation. Some of the F7 lines selected for the resistant to bacterial leaf blight were also found to be resistant to sheath blight.View full abstractDownload PDF (5670K) -
I. Some Properties of Extracellular Mannanase*Rihei TAKAHASHI, Isao KUSAKABE, Akio MAEKAWA, Takao SUZUKI, Kazuo MURA ...1983 Volume 27 Issue 3 Pages 140-148
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSSome properties of extracellular β-1, 4-mannanase system from the strains belonging to Actinomycetes were described in this paper.
Over 400 soil samples were collected from various districts of the Philippines as isolation source. Twenty strains were found to form clear zone around the colonies when grown on the agar medium plate with copra mannan as carbon source. Then, 4 strains were selected as mannanase producing strains by liquid culture for datailed examination of mannanase system.
Throughout the experiment, dialyzate of culture filtrate was employed as enzyme solution. The optimum pH and temperature were 7 and 40°-47°C, respectively. The enzymes were stable at pH 5 to pH 7 when treated at 30°C for 3 hr except the enzyme from one strain, which was stable up to pH 10. Heating the enzymes at 40°C for 30 min did not effect their stability.
Each enzyme rapidly solubilized the powdered copra mannan at the early stagy of hydrolysis, and various β-1, 4-mannooligosaccharides were observed. But at the final stage the copra mannan employed was hydrolyzed to mannose and mannobiose with small amounts of mannotriose and unknown oligosaccharides. The average degree of polymerization of hydrolyzates decreased to 1.7-2.0 at the final stage. In addition, the enzymes did not hydrolyze mannobiose.View full abstractDownload PDF (4789K) -
Shohei HIROSE, Emma S. DATA, Ikuzo URITANI1983 Volume 27 Issue 3 Pages 149-157
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThe post-harvest deterioration process of cassava roots was observed in more detail in relation with environmental factors. Two distinct types in vascular streaking (VS) were observed and these two types of VS were distinguished as type I and type II. Especially, VS type II seemed to be associated with microbial deterioration. In testing on the differences in susceptibility to VS type I, the susceptibility showed negative correlation with the moisture constent of roots at harvest. Burying into clamp was suggested to be effective enough as a simple technique for cassava storage in farmers level.View full abstractDownload PDF (6503K) -
2. Yield of corn plant at the second cultivation after burningShigekazu HAYASHI, Masawo KAMANOI, Kanha BUNPROMMA1983 Volume 27 Issue 3 Pages 158-165
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESS -
2. Nutritional Factors of the Soils Limiting the Growth of Cassava and Effect of Alang-Alang (Imperata cylindrica) ApplicationToshiaki TADANO, Midori NINAKI, Kazuhirr OYA, J. LUMBANRAJA, M. UTOMO, ...1983 Volume 27 Issue 3 Pages 166-174
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSNutritional factors limiting the growth of cassava cultivated on the red-yellow podzolic soils distributed in the Province of Lampung, Indonesia and the effect of alang-clang (Imperata cylindrica) application were investigated. The low nitrogen supply of the soil was the most important factor limiting the growth of cassava. Cassava tolerated well the low phosphorus and low pH conditions of the soils. It was suggested that the application of alang-alang would enable to increase significantly crop yields in the red-yellow podzolic soil area where crops are cultivated without fertilizers.View full abstractDownload PDF (1002K) -
Shigeru HISAJIMA, Yuji ARAI, Yasusada OHTA, Keisuke TSUBAKI, Gen OKADA1983 Volume 27 Issue 3 Pages 175-180
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSA black fungus was isolated from sago palm (Meteroxlon sagus) stems imported from Sarawak and identified. Morphological and taxonomic studies revealed the fungus is Chalara paradoxa, Fungi Imperfecti, which has not been reported in Japan. It is suggested that the fungus may have come from Sarawak.
The fungus utilized sago starch better than potato soluble starch, maltose and glucose, and the best among the carbohydrates tested. It was thought that the fungus well produced amylase in the culture medium. The fungus grew in a wide range of pH, namely 2.0 to 7.0, and the best growth rate was obtained 27°C and the fungus grew little at 3 and 41°C. When the fungus was cultured using modified czapek basal medium, yeast extract appeared to be essential for fungus growth.
The fungus grew into the agar medium and spread widely on whole surface of agar medium. It utilized CMC and cellobioe but not cellulose powder and crystalline cellulose (Avicel S. F.) . It suggests that the fungus produced a kind of β-glucosidase. It also produced ethanol and unidentified aromatic substances in the culture medium.
The possibilitis, biotransformation of sago starch to single cell protein by the fungus and the application of the fungus to another starch industry, were mentioned.View full abstractDownload PDF (8094K) -
Jun INOUYE1983 Volume 27 Issue 3 Pages 181-186
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSUsing the new method for measuring elongation ability decided at 1976 Deep-Water Rice Workshop, 60 varieties from Bangladesh, Cambodia, Thailand and Vietnam were examined. A positive correlation was found between plant length and total internode length (r=0.615) . However, there was no correlation between plant length and number of fully emerged leaves from water surface (r=0.235 n.s.), but high positive correlation between total internode length and number of fully emerged leaves (r=0.796) . On the other hand, negative correlations were found between position of the lowest elongated internode and plant length (r= -0.312), number of fully emerged leaves (r= -0.855), and total internode length (r=-0.826) . From these results, it is suggested that the position of the lowest elongated internode can represent the elongation ability of floating rice under deep water conditions.View full abstractDownload PDF (698K) -
Charan CHANTALAKHANA, Supat FAARUNGSANG, Prachan VEERASIT, Surachet US ...1983 Volume 27 Issue 3 Pages 187-190
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSFour-hundred and twenty five calvings from 152 swamp buffalo cows were used to study the effects of parity and sex of calf on calving interval and calf birth weight, as well as the repeatabilities and the relatinoship of these traits.
The effect of parity was found to be highly significant to both traits. Calf birth weight increased with parity (27.2, 27.2, 29.5, 31.0 kg), while calving interval decreased (643, 559, 494 days) . The repeatability estimates were found to be medium (0.36 and 0.39) for birth weight and calving interval. The correlations of adjacent birth weights were positive and mostly highly significant, while that of two adjacent calving intervals appeared to be negative.View full abstractDownload PDF (373K) -
VIII. Changes in varieties in the Muda irrigation area and nitrogen response of the main varietiesMichio NOZAKI1983 Volume 27 Issue 3 Pages 191-197
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
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[in Japanese]1983 Volume 27 Issue 3 Pages 198-204
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
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Shohei HIROSE1983 Volume 27 Issue 3 Pages 205-210
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
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[in Japanese]1983 Volume 27 Issue 3 Pages 211-212
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
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[in Japanese], [in Japanese]1983 Volume 27 Issue 3 Pages 213-214
Published: September 01, 1983
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (285K)
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