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在盐胁迫下，四倍体盐腺中钙积累的增加增强了对钠的选择性分泌。

Increasing Ca accumulation in salt glands under salt stress increases stronger selective secretion of Na in tetraploids.

作者信息

Duan Yifan, Jiang Liqiong, Lei Ting, Ouyang Keyu, Liu Cailei, Zhao Zi'an, Li Yirui, Yang Lijuan, Li Jiani, Yi Shouli, Gao Suping

机构信息

College of Landscape Architecture, Sichuan Agricultural University, Chengdu, China.

Chengdu Academy of Agriculture and Forestry Sciences, Chengdu, China.

出版信息

Front Plant Sci. 2024 Apr 15;15:1376427. doi: 10.3389/fpls.2024.1376427. eCollection 2024.

DOI:10.3389/fpls.2024.1376427
PMID:38685960
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11056565/
Abstract

Under salt stress, recretohalophyte Plumbago auriculata tetraploids enhance salt tolerance by increasing selective secretion of Na compared with that in diploids, although the mechanism is unclear. Using non-invasive micro-test technology, the effect of salt gland Ca content on Na and K secretion were investigated in diploid and tetraploid P. auriculata under salt stress. Salt gland Ca content and secretion rates of Na and K were higher in tetraploids than in diploids under salt stress. Addition of exogenous Ca increased the Ca content of the salt gland in diploids and is accompanied by an increase in the rate of Na and K secretion. With addition of a Ca channel inhibitor, diploid salt glands retained large amounts of Ca, leading to higher Ca content and Na secretion rate than those of tetraploids. Inhibiting HO generation and H-ATPase activity altered Na and K secretion rates in diploids and tetraploids under salt stress, indicating involvement in regulating Na and K secretion. Our results indicate that the increased Na secretion rate of salt gland in tetraploids under salt stress was associated with elevated Ca content in salt gland.

摘要

在盐胁迫下，泌盐盐生植物耳状补血草四倍体通过增加Na的选择性分泌来提高耐盐性，相比二倍体而言，尽管其机制尚不清楚。利用非损伤微测技术，研究了盐胁迫下二倍体和四倍体耳状补血草盐腺Ca含量对Na和K分泌的影响。在盐胁迫下，四倍体盐腺Ca含量以及Na和K的分泌速率均高于二倍体。添加外源Ca增加了二倍体盐腺的Ca含量，并伴随着Na和K分泌速率的增加。添加Ca通道抑制剂后，二倍体盐腺保留了大量Ca，导致其Ca含量和Na分泌速率高于四倍体。抑制HO生成和H-ATPase活性改变了盐胁迫下二倍体和四倍体的Na和K分泌速率，表明其参与调节Na和K的分泌。我们的结果表明，盐胁迫下四倍体盐腺Na分泌速率的增加与盐腺中Ca含量的升高有关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/a5f218df7f7b/fpls-15-1376427-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/85086866b314/fpls-15-1376427-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/f0f36f09323b/fpls-15-1376427-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/c13f56cec7de/fpls-15-1376427-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/5024ba646cf3/fpls-15-1376427-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/d6b60adbb205/fpls-15-1376427-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/5251407df347/fpls-15-1376427-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/a5f218df7f7b/fpls-15-1376427-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/85086866b314/fpls-15-1376427-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/f0f36f09323b/fpls-15-1376427-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/c13f56cec7de/fpls-15-1376427-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/5024ba646cf3/fpls-15-1376427-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/d6b60adbb205/fpls-15-1376427-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/5251407df347/fpls-15-1376427-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8b50/11056565/a5f218df7f7b/fpls-15-1376427-g007.jpg

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