期刊
PLANT CELL AND ENVIRONMENT
卷 35, 期 8, 页码 1393-1406出版社
WILEY
DOI: 10.1111/j.1365-3040.2012.02497.x
关键词
14-3-3 proteins; carbon allocation; proton; root; starch; sucrose
资金
- National Natural Science Foundation of China [30800707]
- National Basic Research Program of China [2007CB109303]
- Hong Kong Research Grants Council [HKBU 262809]
- Hong Kong Baptist University Strategic Development Fund [SDF 090910P03]
- Hong Kong Scholars Program [XJ2011043]
14-3-3 proteins are a large family of proteins but exact roles of their members in plant response to abiotic stresses are not clear, especially under nutrient deficiency. We investigated the expressions of all the tomato 14-3-3 gene family members (TFT1TFT12) under low phosphorus stress (LP) and found that TFT6 belongs to the later responsive gene while TFT7 belongs to the early responsive gene. When the two genes were separately introduced into Arabidopsis and overexpressed, their plant growth under LP was much enhanced compared with wild-type plant. TFT6 overexpressing plants showed reduced starch synthase activity, reduced starch content but enhanced sucrose loading into phloem in the shoot under LP. TFT7 overexpressing plants had much enhanced H+ flux along their root tip and activity of plasma membrane H+-ATPase in the roots under LP. Our results suggest that TFT6 and TFT7 play different roles in plant adaption to LP. TFT6 acts mainly in leaves and is involved in the systemic response to LP 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 LP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据