Department Biologie I, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany.
Trends Plant Sci. 2010 Feb;15(2):98-105. doi: 10.1016/j.tplants.2009.11.004. Epub 2009 Dec 11.
There have been many recent developments concerning the metabolic, transport and signalling functions of adenylates in plants, suggesting new roles for these compounds as central regulators of plant physiology. For example, altering the expression levels of enzymes involved in the equilibration, salvaging, synthesis and transport of adenylates leads to perturbations in storage, growth and stress responses, implying a role for adenylates as important signals. Furthermore, sensing of the internal energy status involves SNF1-related kinases, which control the expression and phosphorylation of key metabolic enzymes. ATP also acts as an apoplastic signalling molecule to control cell growth and pathogen responses. These new results could shed light on the emerging question of whether energy homeostasis in plant cells differs from mechanisms found in microbes and mammals.
最近，人们对植物中腺嘌呤的代谢、转运和信号功能有了很多新的认识，这表明这些化合物可能作为植物生理学的核心调节剂发挥新的作用。例如，改变参与腺嘌呤平衡、回收、合成和转运的酶的表达水平会导致储存、生长和应激反应的紊乱，这意味着腺嘌呤可能作为重要的信号分子发挥作用。此外，对内部能量状态的感应涉及 SNF1 相关激酶，它控制关键代谢酶的表达和磷酸化。ATP 还作为质外体信号分子来控制细胞生长和病原体反应。这些新的研究结果可能有助于回答一个正在出现的问题，即在植物细胞中，能量平衡是否与微生物和哺乳动物中发现的机制不同。
