scholarly journals Planting Density Suitable for Late Transplanting for Avoiding High Temperature During the Ripening Period of Rice Cultivar Koshihikari in Toyama Prefecture, Japan

2011 ◽  
Vol 80 (2) ◽  
pp. 220-228 ◽  
Author(s):  
Kazuhiro Morita ◽  
Wataru Takahashi ◽  
Fumio Sugimori ◽  
Masami Furuhata
Keyword(s):  
High Temperature ◽  
Rice Cultivar ◽  
Planting Density ◽  
Ripening Period

scholarly journals Detection of QTLs for white-back and basal-white grains caused by high temperature during ripening period in japonica rice

2015 ◽  
Vol 65 (3) ◽  
pp. 216-225 ◽  
Author(s):  
Takuya Wada ◽  
Katsunori Miyahara ◽  
Jun-ya Sonoda ◽  
Tadashi Tsukaguchi ◽  
Masayuki Miyazaki ◽  
...  
Keyword(s):  
High Temperature ◽  
Ripening Period

scholarly journals The Role of Antioxidant Enzymes in Adaptive Responses to Sheath Blight Infestation under Different Fertilization Rates and Hill Densities

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Wu ◽  
Xuejie Wan ◽  
Farooq Shah ◽  
Shah Fahad ◽  
Jianliang Huang
Keyword(s):  
Antioxidant Enzymes ◽  
Rice Cultivar ◽  
Sheath Blight ◽  
Planting Density ◽  
Lesion Length ◽  
Adaptive Responses ◽  
Block Method ◽  
Sod Activity ◽  
Agar Block ◽  
Mda Content

Sheath blight of rice, caused byRhizoctonia solani, is one of the most devastating rice diseases worldwide. No rice cultivar has been found to be completely resistant to this fungus. Identifying antioxidant enzymes activities (activity of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)) and malondialdehyde content (MDA) responding to sheath blight infestation is imperative to understand the defensive mechanism systems of rice. In the present study, two inoculation methods (toothpick and agar block method) were tested in double-season rice. Toothpick method had greater lesion length than agar block method in late season. A higher MDA content was found under toothpick method compared with agar block method, which led to greater POD and SOD activities. Dense planting caused higher lesion length resulting in a higher MDA content, which also subsequently stimulated higher POD and SOD activity. Sheath blight severity was significantly related to the activity of antioxidant enzyme during both seasons. The present study implies that rice plants possess a system of antioxidant protective enzymes which helps them in adaptation to sheath blight infection stresses. Several agronomic practices, such as rational use of fertilizers and optimum planting density, involved in regulating antioxidant protective enzyme systems can be regarded as promising strategy to suppress the sheath blight development.

Effect of Plant Spacing on Growth and Yield of Rice (Oryza sativa L.) under Submerged Condition

2019 ◽  
pp. 1-6
Author(s):  
Bhuneshwar Verma ◽  
L. K. Ramteke ◽  
M. Shahid
Keyword(s):  
Oryza Sativa L ◽  
Block Design ◽  
Rice Variety ◽  
Rice Cultivar ◽  
Growth And Yield ◽  
Planting Density ◽  
Plant Spacing ◽  
Submerged Condition ◽  
Rabi Season ◽  
Randomized Complete Block Design

The experiment was conducted to find out the effect of plant spacing on the performance of rice variety IR-64 and IR64-Sub1 under conventional and Submerged condition at the National Rice Research Institute (NRRI), Cuttack, Odisha during the Rabi season of 2018. Different planting densities were maintained using different spacing's. These include (S1) 15 cm × 10 cm, (S2) 15 cm × 20 cm. The experiment was laid out in a randomized complete block design with 3 replications spacing of 15 cm × 10 cm with produced the highest grain yield of 350 gm-2 in submerged condition on IR64-Sub1 rice cultivar, which was significantly higher than the yield with recommended density (15 cm × 10 cm with IR64 Sub1). This yield was increased due to higher number of panicles m-2. This result suggests that higher planting density (15 cm×10 cm) rather than increased number of seedling hill-1 is necessary for getting higher yield of IR-64Sub1 rice cultivar in continuous submerged condition (where V1=IR 64, V2=IR-64 Sub1, S1=15 cm×10 cm, S2=20 cm×15 cm).

scholarly journals Identification of a novel gene (Apq1) from the indica rice cultivar ‘Habataki’ that improves the quality of grains produced under high temperature stress

2014 ◽  
Vol 64 (4) ◽  
pp. 273-281 ◽  
Author(s):  
Kazumasa Murata ◽  
Yukihide Iyama ◽  
Takuya Yamaguchi ◽  
Hidenobu Ozaki ◽  
Yoshinori Kidani ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
Indica Rice ◽  
Rice Cultivar ◽  
High Temperature Stress ◽  
Novel Gene ◽  
Indica Rice Cultivar
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