کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10767593 | 1050775 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A protective role for the polyamine spermine against drought stress in Arabidopsis
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A protective role for the polyamine spermine against drought stress in Arabidopsis A protective role for the polyamine spermine against drought stress in Arabidopsis](/preview/png/10767593.png)
چکیده انگلیسی
Cellular polyamine content often changes in response to abiotic stresses. However, its physiological relevance is unknown. We found that an Arabidopsis mutant plant (acl5/spms), which cannot produce spermine, is hypersensitive to high salt. Examination of drought sensitivity of the mutant and comparison with wild type plants indicated hypersensitivity to drought. This phenotype was cured by spermine pretreatment but not by the other polyamines putrescine and spermidine, suggesting that drought-hypersensitivity exhibited by the mutant is due to spermine deficiency. The water loss rate of wild type and mutant plants were similar until 20Â min after onset of dehydration stress, but after a longer exposure the rate in mutant plants was higher than in wild type plants. Consistent with this result, the stomata of the mutant leaves remained open while in wild type leaves they closed. Based on the collected data, we discuss a role for spermine in response to drought stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 352, Issue 2, 12 January 2007, Pages 486-490
Journal: Biochemical and Biophysical Research Communications - Volume 352, Issue 2, 12 January 2007, Pages 486-490
نویسندگان
Koji Yamaguchi, Yoshihiro Takahashi, Thomas Berberich, Akihiko Imai, Taku Takahashi, Anthony J. Michael, Tomonobu Kusano,