NDLI: Salt-induced expression of genes related to Na$^{+}$/K$^{+}$ and ROS homeostasis in leaves of salt-resistant and salt-sensitive poplar species

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Plant Molecular Biology : Volume 73, Issue 1-2, May 2010

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Salt-induced expression of genes related to Na$^{+}$/K$^{+}$ and ROS homeostasis in leaves of salt-resistant and salt-sensitive poplar species

Content Provider	Springer Nature Link
Author	Ding, Mingquan Hou, Peichen Shen, Xin Wang, Meijuan Deng, Shurong Sun, Jian Xiao, Fei Wang, Ruigang Zhou, Xiaoyang Lu, Cunfu Zhang, Deqiang Zheng, Xiaojiang Hu, Zanmin Chen, Shaoliang
Copyright Year	2010
Abstract	Using the Affymetrix poplar genome array, we explored the leaf transcriptome of salt-tolerant Populus euphratica Oliv. and salt-sensitive P. popularis 35-44 (P. popularis) under control and saline conditions. Our objective was to clarify the genomic differences in regulating K$^{+}$/Na$^{+}$ and reactive oxygen species (ROS) homeostasis between the two species. Compared to P. popularis, salt-tolerant P. euphratica responses to salinity involved induction of a relatively larger number of probesets after short-term (ST) exposure to 150 mM NaCl (24 h) and relatively fewer probesets after a long-term (LT) exposure to salinity (200 mM NaCl, 28 days). Compared to P. popularis, leaves of the control P. euphratica plants exhibited a higher transcript abundance of genes related to Na$^{+}$/H$^{+}$ antiport (Na$^{+}$/H$^{+}$ antiporters, H$^{+}$ pumps) and K$^{+}$ uptake and transport. Notably, the expression of these genes did not decrease (with a few exceptions) during salt treatment. Regarding ROS homeostasis, P. euphratica exhibited rapid up-regulation of a variety of antioxidant enzymes after exposure to ST salinity, indicating a rapid adaptive response to salt stress. However, the effect of NaCl on transcription in P. popularis leaves was more pronounced after exposure to prolonged salinity. LT-stressed P. popularis up-regulated some genes mediating K$^{+}$/Na$^{+}$ homeostasis but decreased transcription of main scavengers of superoxide radicals and H$_{2}$O$_{2}$ except for some isoforms of a few scavengers. Mineral and ROS analyses show that NaCl induced a marked increase of leaf Na$^{+}$ and H$_{2}$O$_{2}$ in LT-stressed plants of the two species and the effects were even more pronounced in the salt-sensitive poplar. We place the transcription results in the context of our physiological measurements to infer some implications of NaCl-induced alterations in gene expression related to K$^{+}$/Na$^{+}$ and ROS homeostasis.
Starting Page	251
Ending Page	269
Page Count	19
File Format	PDF
ISSN	01674412
Journal	Plant Molecular Biology
Volume Number	73
Issue Number	3
e-ISSN	15735028
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-02-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Affymetrix poplar genome array NaCl Populus euphratica P. popularis Salt tolerance Plant Pathology Biochemistry Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Agronomy and Crop Science

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Salt-induced expression of genes related to Na$^{+}$/K$^{+}$ and ROS homeostasis in leaves of salt-resistant and salt-sensitive poplar species

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