State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.
Plant Signal Behav. 2012 Aug;7(8):1047-8. doi: 10.4161/psb.20997. Epub 2012 Jul 27.
Higher plants adapt to phosphorus deficiency through a complex of biological processes. Among of them, two adaptive processes are very important for the response of higher plants to phosphorus deficiency. One is the enhancement of root growth by regulating carbohydrate metabolism and allocation, and the other is rhizosphere acidification to acquire phosphorus efficiently from soil. TFT6 and TFT7, two different members of tomato 14-3-3 gene family, play the distinct roles in the adaption of plants to phosphorus deficiency by taking part in the two processes respectively. TFT6 which acts mainly in leaves is involved in the systemic response to phosphorus deficiency by regulating leaf carbon allocation and increasing phloem sucrose transport to promote root growth, while TFT7 directly functions in root by activating root plasma membrane H (+) -ATPase to release more protons under phosphorus deficiency. Based on these results, we propose that 14-3-3 proteins play the smart role in response to phosphorus deficiency in higher plants.
高等植物通过一系列复杂的生物学过程来适应磷缺乏。其中，有两个适应过程对高等植物响应磷缺乏非常重要。一个是通过调节碳水化合物代谢和分配来增强根系生长，另一个是根际酸化，以便从土壤中有效地获取磷。番茄 14-3-3 基因家族的两个不同成员 TFT6 和 TFT7 通过分别参与这两个过程，在植物对磷缺乏的适应中发挥不同的作用。主要在叶片中起作用的 TFT6 通过调节叶片碳分配和增加韧皮部蔗糖运输来促进根系生长，从而参与系统性响应磷缺乏，而 TFT7 则通过在磷缺乏时激活根质膜 H (+) -ATPase 释放更多质子直接在根中起作用。基于这些结果，我们提出 14-3-3 蛋白在高等植物响应磷缺乏中发挥了重要作用。
