کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2017664 | 1067811 | 2009 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Salt tolerant mechanisms in single-cell C4 species Bienertia sinuspersici and Suaeda aralocaspica (Chenopodiaceae)
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کلمات کلیدی
PPFDCMOBADH - بادهbetaine aldehyde dehydrogenase - بتائین آلدئید دهیدروژنازSalt tolerance - تحمل نمکphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیScanning electron microscopy - میکروسکوپ الکترونی روبشیHalophytes - هالوفیدهاCholine monooxygenase - کولین مونوکسینژازGlycine betaine - گلیسین بتائین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Salt tolerant mechanisms in single-cell C4 species Bienertia sinuspersici and Suaeda aralocaspica (Chenopodiaceae) Salt tolerant mechanisms in single-cell C4 species Bienertia sinuspersici and Suaeda aralocaspica (Chenopodiaceae)](/preview/png/2017664.png)
چکیده انگلیسی
Suaeda aralocaspica and Bienertia sinuspersici (Chenopodiaceae), which have unusual mechanisms of C4 photosynthesis by dimorphic chloroplasts within individual chlorenchyma cells, grow in saline semi-arid desert regions in Central Asia and around the Persian Gulf. Their response to salinity was studied, along with those of the related C3Suaeda heterophylla and Kranz (dual cell) type C4Suaeda eltonica in subfamily Suaedoideae. Light response curves for CO2 fixation with salt treatment (200Â mM NaCl) indicated these species have high tolerance to salinity. All accumulated glycine betaine (GB) which is known to protect against abiotic stress. Western blots showed that the protein levels of choline monooxygenase (CMO) and betaine aldehyde dehydrogenase (BADH), enzymes catalyzing synthesis of GB from choline, increased under salt stress in both single-cell type C4 species. Their cDNAs for CMO and BADH were isolated, sequenced and phylogenetic analyses showed that CMO for both species, and BADH for B. sinuspersici, are in a clade in subfamily Suaedoideae. Results of in situ immunolocalization experiments with BADH antibody show that both chloroplast types in the single-cell C4 species and in the Kranz type C4S. eltonica function in GB synthesis. Scanning electron microscopy (SEM) and X-ray microanalysis showed B. sinuspersici has very prominent salt glands, which accumulate sodium chloride under salt stress, while S. aralocaspica lacks salt glands. The bases for salt tolerance in these species are discussed considering anatomical and biochemical features.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 176, Issue 5, May 2009, Pages 616-626
Journal: Plant Science - Volume 176, Issue 5, May 2009, Pages 616-626
نویسندگان
Joonho Park, Thomas W. Okita, Gerald E. Edwards,