期刊
TRENDS IN PLANT SCIENCE
卷 22, 期 3, 页码 236-248出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2016.12.004
关键词
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资金
- Australian Research Council (ARC) [FT130100709, CE140100008, DP1095542]
- Grains Research and Development Corporation (Australia) [UA00118, UA00145]
- Wine Australia
- Waite Research Institute
- King Abdullah University of Science and Technology
- Australian Research Council [DP1095542] Funding Source: Australian Research Council
Chloride (Cl-) is an essential plant nutrient but under saline conditions it can accumulate to toxic levels in leaves; limiting this accumulation improves the salt tolerance of some crops. The rate-limiting step for this process- the transfer of Cl- from root symplast to xylem apoplast, which can antagonize delivery of the macronutrient nitrate (NO3) to shoots- is regulated by abscisic acid (ABA) and is multigenic. Until recently the molecular mechanisms underpinning this salt tolerance trait were poorly defined. We discuss here how recent advances highlight the role of newly identified transport proteins, some that directly transfer Cl- into the xylem, and others that act on endomembranes in 'gatekeeper' cell types in the root stele to control root-to-shoot delivery of C.
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