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Essay On Rice Production

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Rice is a monocotyledonous angiosperm. The genus, to which it belongs, Oryza, contains more than 20 species, only two of which are referred to as cultivated rice: Oryza sativa, (Watanabe, 1997) cultivated in South-east Asian countries and Japan, and Oryza glaberrima cultivated in West Africa. Rice was originally cultivated in tropical Asia, the oldest record dating 5000 years BC, but then extended also to temperate regions (Watanabe, 1997). Rice (Oryza sativa L.) is the most important food crop for nearly half of the world’s population (Sellamuthu et al., 2011). Worldwide, Rice is grown over an area of 160 m. ha. with production of 738.2 million tons in the world (FAO, 2015). Globally, India ranks 1st in cultivable area under rice and 2nd in production producing 131 million tones. Water is the critical and most important factor in rice production. The 70 percent of the world’s food growing areas turn increasingly parched (IRRI, 2009). In India, Rice production in kharif 2015-16, is …show more content…
Abiotic stress is the primary cause of crop loss worldwide, reducing average yields for most major crop plants by more than 50% (Boyer 1982; Bray et al., 2000). Among this abiotic stress (cold, temperature, salinity, drought, oxidative stress etc.) drought is the most economically important abiotic constraint to crop production in the world (Araus et al., 2002; Boyer, 1982). Drought is the most important limiting factor for crop production and it is becoming an increasingly severe problem in many regions of the world. Plant response to drought stress is one of the most complex biological processes, and it involves numerous changes at the physiological, cellular and molecular levels. Many genes have been identified to be involved in the response of drought stress in plants (Zhang et al.,

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