细胞分裂素
生物
氮气循环
新陈代谢
信号转导
信号
生物化学
氮同化
细胞生物学
氮气
代谢途径
硝酸盐
同化(音韵学)
基因表达调控
基因
生长素
生态学
化学
语言学
哲学
有机化学
作者
Hitoshi Sakakibara,Kentaro Takei,Naoya Hirose
标识
DOI:10.1016/j.tplants.2006.07.004
摘要
Inorganic nitrogen is a substrate for nitrogen assimilation and also functions as a signal triggering widespread changes in gene expression that modulate metabolism and development. To integrate the actions of the nitrogen signal at the whole plant level, plants use multiple signaling routes that communicate internal and external nitrogen status. One route depends on nitrate itself and one uses cytokinin as a messenger. Recent genome-wide research has shown that the nitrate-specific signal regulates a wide variety of metabolic processes including nitrogen and carbon metabolism, and cytokinin biosynthesis. Cytokinin-mediated signaling is related to the control of development, protein synthesis and acquisition of macronutrients. The coordination and interaction of both regulatory pathways is important for normal plant growth under variable nitrogen supply conditions.
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