By Pranab Basuchaudhuri
Rice is the staple meals for greater than 1/2 the world's inhabitants, but chilly temperatures in the course of the cropping interval reason an important lack of yield. to deal with the world's expanding inhabitants, it will be significant to strengthen excessive yielding rice kinds which are tolerant to abiotic pressure stipulations, corresponding to drought, salinity, and chilly. This booklet presents a transparent realizing of chilly pressure in rice within the hopes that it'll supply perception to the topic for additional examine in order that rice vegetation can be grown successfully in chilly areas with excessive productivity.
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Additional info for Cold Tolerance in Rice Cultivation
The breakdown of proteins in germinating seeds and in various parts of the plant is accomplished by the activities of proteases and peptidases. Cellular protein patterns change both quantatively and qualitatively with changes in environmental conditions. Limited proteolysis and competing polypeptide degradation are a closely interacting process (Muntz 1996). Seeds storage proteins in rice are essentially globulins which are formed in the specific storage tissue, the endosperm, during seed development.
Color image of this figure appears in the color plate section at the end of the book. 45 Cold Tolerance in Rice Cultivation systems in IR 50 were damaged severely by chilling, which led to lower photosynthetic rate (Guo-Li and Zhen-fei 2005). 2 percent along with each 1°C reduction of water temperature. 7 percent. However, the daily transpiration rate per plant was greater in cold tolerant cultivars compared with sensitive ones (Dai et al. 1993) due to wide stomatal opening. Seminal rice (Oryza sativa L.
2012). 35 Cold Tolerance in Rice Cultivation Dry weight (g plant-1) 20 15 10 5 0 Humid 25C Humid13C Dry 25C Dry 13C Leaf area (Cm2plant-1) Fig. 17 Changes of dry weight under varying humidity and root temperature. 1 0 Humid 25C Humid13C Dry 25C Dry 13C Fig. 18 Changes of leaf area under varying humidity and root temperature (at 55 days after planting). Table 10 Nitrate and ammonium uptake (O moles gfw–1) as influenced by temperature in growing rice seedlings. 0 In a water culture experiment (Table 10) the rice seedlings showed no appreciable nitrate uptake at temperature below 15ºC, whereas appreciable ammonium uptake occurred at 15ºC, although lowered passive absorption and complete inhibition 36 Vegetative Growth of the rapid metabolism dependent absorption phase were observed at 5ºC (Sasakawa and Yamamoto 1978).