کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2018215 | 1067840 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light interacts with salt stress in regulating superoxide dismutase gene expression in Arabidopsis
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Arabidopsis thaliana plants (Col, Columbia, and N1438) were grown for 15 d under two light regimes providing different growth rates. The medium contained 0-85Â mM NaCl. Shoot biomass and ion accumulation were measured. Superoxide dismutase (SOD) activity was assayed on gels, and the expression of six SOD genes was studied using real-time PCR. Mean growth rate was increased in high light (HL) regime as compared to low light (LL) regime. Parallely, most of SOD genes were overexpressed in Col and underexpressed in N1438 in response to HL. At 50Â mM NaCl, plant growth was inhibited and a complex pattern of SOD gene expression was recorded. These responses varied according to the light regime, and differed between the accessions. This pattern, including the differences between the accessions, could be interpreted as a consequence of interaction between light and salt, hypothesizing that oxidative stress occurred when light energy input exceeded energy utilization when salt inhibited growth, and that oxidative stress induced overexpression of some SOD genes. Salt-induced excess Na+ accumulation in leaves and limitation of K+ provision to these organs might also participate in eliciting SOD genes' response. Variability was observed between the two accessions for all these traits.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 177, Issue 3, September 2009, Pages 161-167
Journal: Plant Science - Volume 177, Issue 3, September 2009, Pages 161-167
نویسندگان
Houneida Attia, Najoua Karray, Mokhtar Lachaâl,