کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8355558 | 1541951 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Antioxidant and photosystem II responses contribute to explain the drought-heat contrasting tolerance of two forage legumes
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کلمات کلیدی
Trifolium pratenseAPXPSIIP5CCATBSA - BSAROS - ROSHydrogen peroxide - آب اکسیژنهHeat stress - استرس گرماییWater stress - تنش آب یا بحران آبHeat treatment - حرارت درمانیcontrol treatment - درمان کنترلsuperoxide radical - رادیکال سوپراکسیدHydroxyl radicals - رادیکالهای هیدروکسیلSOD - سدSuperoxide dismutase - سوکسوکس دیسموتازClover - شبدرPhotoinhibition - عکسبرداریPhotosystem II - فتوسیستم 2LOTUS - لوتوسLotus corniculatus - لوتوس کریکولیوسPRO - نرم افزارH2O2 - هیدروژن پراکسیدascorbate peroxidase - پراکسیداز آسکورباتیProline - پرولینCatalase - کاتالازglutathione reductase - گلوتاتیون ردوکتازReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Identification of metabolic targets of environmental stress factors is critical to improve the stress tolerance of plants. Studying the biochemical and physiological responses of plants with different capacities to deal with stress is a valid approach to reach this objective. Lotus corniculatus (lotus) and Trifolium pratense (clover) are legumes with contrasting summer stress tolerances. In stress conditions, which are defined as drought, heat or a combination of both, we found that differential biochemical responses of leaves explain these behaviours. Lotus and clover showed differences in water loss control, proline accumulation and antioxidant enzymatic capacity. Drought and/or heat stress induced a large accumulation of proline in the tolerant species (lotus), whereas heat stress did not cause proline accumulation in the sensitive species (clover). In lotus, Mn-SOD and Fe-SOD were induced by drought, but in clover, the SOD-isoform profile was not affected by stress. Moreover, lotus has more SOD-isoforms and a higher total SOD activity than clover. The functionality and electrophoretic profile of photosystem II (PSII) proteins under stress also exhibited differences between the two species. In lotus, PSII activity was drastically affected by combined stress and, interestingly, was correlated with D2 protein degradation. Possible implications of this event as an adaption mechanism in tolerant species are discussed. We conclude that the stress-tolerant capability of lotus is related to its ability to respond to oxidative damage and adaption of the photosynthetic machinery. This reveals that these two aspects should be included in the evaluation of the tolerance of species to stress conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 70, September 2013, Pages 195-203
Journal: Plant Physiology and Biochemistry - Volume 70, September 2013, Pages 195-203
نویسندگان
Santiago Signorelli, Esteban Casaretto, Martha Sainz, Pedro DÃaz, Jorge Monza, Omar Borsani,