کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2015054 1541966 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cytokinin oxidase is involved in the regulation of cytokinin content by 24-epibrassinolide in wheat seedlings
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Cytokinin oxidase is involved in the regulation of cytokinin content by 24-epibrassinolide in wheat seedlings
چکیده انگلیسی

Fast and stable 2-fold accumulation of cytokinins (CKs) was detected initially in roots and then in shoots of 4-day-old wheat (Triticum aestivum L.) seedlings in the course of their treatment with 0.4 μM 24-epibrassinolide (EBR). Elevated cytokinin level has been maintained only in the presence of EBR, while the hormone removal has led to return of cytokinin concentration to the control level initially in the roots and then in the shoots. EBR-induced accumulation of cytokinins was accompanied by inhibition of both cytokinin oxidase (CKX) (cytokinin oxidase/dehydrogenase, EC 1.5.99.12) activity and expression of the gene coding for this enzyme, and on the contrary the decline in CKs level resulted in increase in these characteristics up to the control level in roots and then in shoots. Sharp accumulation of cytokinin O-glucosides has been discovered in response to EBR-treatment suggesting fast EBR-induced activation of production of cytokinins, which excessive amounts were transferred into the storage forms. The obtained data provide evidence for the involvement of EBR in regulation of cytokinin level in wheat seedlings.


► 24-Epibrassinolide treatment leads to increase in the cytokinin level in roots and shoots of wheat seedlings.
► 24-Epibrassinolide evokes cytokinin O-glucosides accumulation in roots and shoots of wheat seedlings.
► 24-Epibrassinolide inhibits gene expression and enzyme activity of cytokinin oxidase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 55, June 2012, Pages 1–6
نویسندگان
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