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Effect of NaCl on leaf H+-ATPase and the relevance to salt tolerance in two contrasting poplar species

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Effect of NaCl on leaf H+-ATPase and the relevance to salt tolerance in two contrasting poplar species

Content Provider	Springer Nature Link
Author	Ma, Xiuying Deng, Lin Li, Jinke Zhou, Xiaoyang Li, Niya Zhang, Decai Lu, Yanjun Wang, Ruigang Sun, Jian Lu, Cunfu Zheng, Xiaojiang Fritz, Eberhard Hüttermann, Aloys Chen, Shaoliang
Copyright Year	2010
Abstract	During a 30-day period of increasing salinity, we examined the effects of NaCl on leaf H+-ATPase and salinity tolerance in 1-year-old plants of Populus euphratica Oliv. (salt resistant) and P. popularis 35–44 (P. popularis) (salt sensitive). Electron probe X-ray microanalysis of leaf mesophyll revealed that P. euphratica had a higher ability to retain lower NaCl concentrations in the cytoplasm, as compared to P. popularis. The sustained activity of H+ pumps (by cytochemical staining) in salinised P. euphratica suggests a role in energising salt transport through the plasma membrane (PM) and tonoplast. Salt-induced alterations of leaf respiration, ATP content and expression of PM H+-ATPase were compared between the two species. Results show that P. euphratica retained a constant respiratory rate, ATP production and protein abundance of PM H+-ATPase (by Western blotting) in salt-stressed plants. P. euphratica was able to maintain a comparatively high capacity of ATP hydrolysis and H+ pumping during prolonged salt exposure. By contrast, the activity and expression of PM H+-ATPase were markedly decreased in P. popularis leaves in response to salt stress. Furthermore, NaCl-stressed P. popularis plants showed a marked decline of respiration (70%) and ATP production (66%) on day 30. We conclude that the inability of P. popularis to transport salt to the apoplast and vacuole was partly due to the decreased activity of H+ pumps. As a consequence, cytosolic ion concentrations were observed to be comparatively high for an extended period of time, so that cell metabolism, in particular respiration, was disrupted in P. popularis leaves.
Starting Page	597
Ending Page	607
Page Count	11
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	24
Issue Number	4
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-03-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ATPase NaCl Populus euphratica Populus popularis Respiratory rate Salt tolerance Western blotting X-ray microanalysis Plant Physiology Plant Pathology Plant Anatomy/Development Agriculture Plant Sciences Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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Extracellular ATP mediates cellular K+/Na+ homeostasis in two contrasting poplar species under NaCl stress

Effect of NaCl on leaf H+-ATPase and the relevance to salt tolerance in two contrasting poplar species

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Effect of NaCl on leaf H+-ATPase and the relevance to salt tolerance in two contrasting poplar species

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