کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2015965 | 1541947 | 2014 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of brassinosteroids and ethylene on ascorbic acid accumulation in tomato leaves
ترجمه فارسی عنوان
تاثیر برسینستروئید ها و اتیلن بر تجمع اسید اسکوربیک در برگ های گوجه فرنگی
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کلمات کلیدی
آنتی اکسیدان ها، اسید اسکوربیک، برسینستروئید، اتیلن، برگها، تنفس، گوجه فرنگی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
چکیده انگلیسی
Plant steroid hormones brassinosteroids (BRs) and the gaseous hormone ethylene (ET) alter the ascorbic acid-glutathione (AA-GSH) levels in tomato (Solanum lycopersicum L.) plants. The interaction of these hormones in regulating antioxidant metabolism is however unknown. The combined use of genetics (BR-mutants) and chemical application (BR/ET-related chemicals) shows that BRs and ET signalling pathways interact, to regulate leaf AA content and synthesis. BR-deficient (dx) leaves display low total AA but BR-accumulating (35S:D) leaves show normal total AA content. Leaves with either BR levels lower or higher than wild type plants showed a higher oxidised AA redox state. The activity of l-galactono-1,4-lactone dehydrogenase (l-GalLDH), the mitochondrial enzyme that catalyses the last step in AA synthesis is lower in dx and higher in 35S:D plants. BR-deficient mutants show higher ET production but it is restored to normal levels when BR content is increased in 35S:D plants. Suppression of ET signalling using 1-methylcyclopropene in dx and 35S:D plants restored leaf AA content and l-GalLDH activity, to the values observed in wild type. The suppression of ET action in dx and 35S:D leaves leads to the respective decreasing and increasing respiration, indicating an opposite response compared to AA synthesis. This inverse relationship is lacking in ET suppressed dx plants in response to external BRs. The modifications in the in vivo activity of l-GalLDH activity do not correlate with changes in the level of the enzyme. Taken together, these data suggest that ET suppresses and BRs promote AA synthesis and accumulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 74, January 2014, Pages 315-322
Journal: Plant Physiology and Biochemistry - Volume 74, January 2014, Pages 315-322
نویسندگان
Luis Miguel Mazorra Morales, MarÃa Eugenia Senn, Gustavo Esteban Gergoff Grozeff, Diego DarÃo Fanello, Cristian Antonio Carrión, Miriam Núñez, Gerard James Bishop, Carlos Guillermo Bartoli,