生物
新陈代谢
同化(音韵学)
氮气循环
氮同化
营养物
次生代谢
植物代谢
铵
生物化学
氮气
酶
生态学
生物合成
基因
化学
有机化学
哲学
核糖核酸
语言学
作者
Min Wang,Qirong Shen,Guohua Xu,Shiwei Guo
标识
DOI:10.1016/b978-0-12-800180-6.00001-3
摘要
Nitrogen (N) is one of the most important mineral nutrients required by higher plants. Primary N absorbed by higher plants includes nitrate NO3–, ammonium (NH4+), and organic N. Plants have developed several mechanisms for regulating their N metabolism in response to N availability and environmental conditions. Numerous transporters have been characterized and the mode of N movement within plants has been demonstrated. For further assimilation of N, various enzymes are involved in the key processes of NO3– or NH4+ assimilation. N and carbon (C) metabolism are tightly coordinated in the fundamental biochemical pathway that permits plant growth. As N and C metabolism are the fundamental constituents of plant life, understanding N regulation is essential for growing plants and improving crop production. Regulation of N metabolism at the transcriptional and posttranscriptional levels provides important perceptions in the complex regulatory network of plants to adapt to changing N availability. In this chapter, recent advances in elucidating molecular mechanisms of N metabolism processes and regulation strategy, as well as interactions between C and N, are discussed. This review provides new insights into the strategy for studying N metabolism at the cellular level for optimum plant growth in different environments.
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