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Apoplastic barriers, aquaporin gene expression and root and cell hydraulic conductivity in phosphate-limited sheepgrass plants
Li, Lingyu1,2,3; Pan, Sirui1; Melzer, Rainer1; Fricke, Wieland1
2020
发表期刊PHYSIOLOGIA PLANTARUM
ISSN0031-9317
卷号168期号:1页码:118-132
摘要Mineral nutrient supply can affect the hydraulic property of roots. The aim of the present work on sheepgrass (Leymus chinensis L.) plants was to test whether any changes in root hydraulic conductivity (Lp; exudation analyses) in response to a growth-limiting supply of phosphate (P) are accompanied by changes in (1) cell Lp via measuring the cell pressure, (2) the aquaporin (AQP) gene expression by performing qPCR and (3) the formation of apoplastic barriers, by analyzing suberin lamella and Casparian bands via cross-sectional analyses in roots. Plants were grown hydroponically on complete nutrient solution, containing 250 mu M P, until they were 31-36 days old, and then kept for 2-3 weeks on either complete solution, or transferred on solution containing 2.5 mu M (low-P) or no added P (no-P). Phosphate treatments caused significant decreases in root and cell-Lp and AQP gene expression, while the formation of apoplastic barriers increased, particularly in lateral roots. Experiments using the AQP inhibitor mercury (Hg) suggested that a significant portion of radial root water uptake in sheepgrass occurs along a path involving AQPs, and that the Lp of this path is reduced under low- and no-P. It is concluded that a growth-limiting supply of phosphate causes parallel changes in (1) cell Lp and aquaporin gene expression (decrease) and (2) apoplastic barrier formation (increase), and that the two may combine to reduce root Lp. The reduction in root Lp, in turn, facilitates an increased root-to-shoot surface area ratio, which allocates resources to the root, sourcing the limiting nutrient.
学科领域Plant Sciences
DOI10.1111/ppl.12981
收录类别SCI
语种英语
WOS关键词WATER TRANSPORT-PROPERTIES ; BARLEY ROOTS ; L. ; RESPONSES ; TRANSPIRATION ; ENDODERMIS ; PRESSURE ; CHANNELS ; NITROGEN ; IONS
WOS研究方向Plant Sciences
WOS记录号WOS:000506175900009
出版者WILEY
文献子类Article
出版地HOBOKEN
EISSN1399-3054
资助机构Chinese Scholarship CouncilChina Scholarship Council Funding Source: Medline ; University College Dublin Funding Source: Medline ; Science and Technology Innovation Funds of Shanxi Agricultural University [2018YJ49] Funding Source: Medline
作者邮箱wieland.fricke@ucd.ie
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/21954
专题中科院光生物学重点实验室
作者单位1.Shanxi Agr Univ, Coll Life Sci, Taigu, Peoples R China
2.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland
3.Chinese Acad Sci, Inst Bot, Key Lab Photobiol, Beijing 100093, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Li, Lingyu,Pan, Sirui,Melzer, Rainer,et al. Apoplastic barriers, aquaporin gene expression and root and cell hydraulic conductivity in phosphate-limited sheepgrass plants[J]. PHYSIOLOGIA PLANTARUM,2020,168(1):118-132.
APA Li, Lingyu,Pan, Sirui,Melzer, Rainer,&Fricke, Wieland.(2020).Apoplastic barriers, aquaporin gene expression and root and cell hydraulic conductivity in phosphate-limited sheepgrass plants.PHYSIOLOGIA PLANTARUM,168(1),118-132.
MLA Li, Lingyu,et al."Apoplastic barriers, aquaporin gene expression and root and cell hydraulic conductivity in phosphate-limited sheepgrass plants".PHYSIOLOGIA PLANTARUM 168.1(2020):118-132.
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