Download Nitrogen metabolism in rice by Pranab Basuchaudhuri PDF

By Pranab Basuchaudhuri

Nitrogen is a vital fundamental nutrient for plant development and improvement. With the call for for prime development and yield of crops and the depletion of organics in soil, nitrogen availability in soil has turn into inadequate. this straightforward and complete publication covers the real and present information about rice plant biology and nitrogen metabolism. The ebook is split into ten chapters that function the stairs of nitrogen assimilation and usage in rice plant structures. except describing the stairs and pathways of nitrogen metabolism in rice, the publication additionally emphasis the adjustments occurring because of genotypes and environmental elements and stressors in the course of rice progress and development.

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Nitrogen use efficiency (NUE), defined as the ratio of grain yield to supplied nitrogen, is a key parameter for evaluating a crop cultivar and it is composed of nitrogen uptake efficiency and nitrogen physiological use efficiency (De Macle and Velk, 2004). Nitrogen uptake efficiency is the nitrogen accumulation relative to its supply, while nitrogen physiological used efficiency represents grain yield relative to nitrogen accumulation (Moll et al. 1982). While the amount of nitrogen available from soil and fertilizer is difficult to measure, grain yield can be used for evaluating the NUE, and high NUE cultivars can be defined by their ability to produce higher grain yield than others under the same experimental conditions.

2007; Cao et al. 2008; Rosales et al. 2011). The enzyme catalyzes the reduction of nitrate to nitrite with pyridine nucleotide in nitrogen assimilation in higher plants (Ahmad and Abdin, 1999). Since nitrite is highly reactive, plant cells immediately transport the nitrite from the cytosol into chloroplast in leaves and plastid in roots. In this organelles, nitrite is further reduced to NH4+ by nitrite reductase (Rosales et al. 2011). Nitrate Nitrate In — NO2– Transported Reductase Cytosol Chloroplast in leaves Plastids in root Transported In higher plants, cytosolic NAD(P)H–nitrate reductase is rapidly modulated by environmental conditions such as light, CO2 or oxygen availability in leaves.

Root growth inhibition by NH4+ in Aabidopsis is mediated by the root tip and is linked to NH4+ efflux and GMPase activity. Plant Cell Environ, 33: 1529-1542. , X. Li, J. R. C. Xu. 2012. Mechanisms for the increased fertilizer nitrogen use efficiency of rice in wheat rice rotation system under combined application of inorganic and organic fertilizers. Ying Yong Sheng Tai XUe Bao, 23: 81-86. Makino, A, T. Mae and K. Ohira. 1988. Differences between wheat and rice in the enzyme properties of ribulose-1, 5-bisphosphate carboxylase/oxygenase in the relationship to photosynthetic gas exchange.

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