کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8386919 | 1543856 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
UV-B radiation modulates physiology and lipophilic metabolite profile in Olea europaea
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کلمات کلیدی
MDANPQCMPΦPSIIRWCChlPSIIUV-BCi/Ca - CI / کلسیمFv/Fm - Fv / FmGC–MS - GC-MSROS - ROSUltraviolet-B radiation - اشعه ماوراء بنفش BClimate change - تغییرات آب و هواminimal fluorescence yield - حداقل عملکرد فلورسانسNon-photochemical quenching - خنک سازی غیر فتوشیمیاییPhotochemical quenching - رفع عکس شیمیاییChlorophyll - سبزینه یا کلروفیلPhotosynthesis - فتوسنتزmalondialdehyde - مالون دی آلدهیدRelative water content - محتوای آب نسبیnet CO2 assimilation rate - میزان جذب CO2 خالصtranspiration rate - نرخ تنفسCell membrane permeability - نفوذ پذیری غشای سلولیStomatal conductance - هدایت گرمایشیfresh weight - وزن ترReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ultraviolet-B (UV-B) radiation plays an important role in plant photomorphogenesis. Whilst the morpho-functional disorders induced by excessive UV irradiation are well-known, it remains unclear how this irradiation modulates the metabolome, and which metabolic shifts improve plants' tolerance to UV-B. In this study, we use an important Mediterranean crop, Olea europaea, to decipher the impacts of enhanced UV-B radiation on the physiological performance and lipophilic metabolite profile. Young olive plants (cv. 'Galega Vulgar') were exposed for five days to UV-B biologically effective doses of 6.5â¯kJâ¯mâ2â¯dâ1 and 12.4â¯kJâ¯mâ2 dâ1. Cell cycle/ploidy, photosynthesis and oxidative stress, as well as GC-MS metabolites were assessed. Both UV-B treatments impaired net CO2 assimilation rate, transpiration rate, photosynthetic pigments, and RuBisCO activity, but 12.4â¯kJâ¯mâ2â¯dâ1 also decreased the photochemical quenching (qP) and the effective efficiency of PSII (ΦPSII). UV-B treatments promoted mono/triperpene pathways, while only 12.4â¯kJâ¯mâ2â¯dâ1 increased fatty acids and alkanes, and decreased geranylgeranyl-diphosphate. The interplay between physiology and metabolomics suggests some innate ability of these plants to tolerate moderate UV-B doses (6.5â¯kJâ¯mâ2â¯dâ1). Also their tolerance to higher doses (12.4â¯kJâ¯mâ2â¯dâ1) relies on plants' metabolic adjustments, where the accumulation of specific compounds such as long-chain alkanes, palmitic acid, oleic acid and particularly oleamide (which is described for the first time in olive leaves) play an important protective role. This is the first study demonstrating photosynthetic changes and lipophilic metabolite adjustments in olive leaves under moderate and high UV-B doses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Plant Physiology - Volume 222, March 2018, Pages 39-50
Journal: Journal of Plant Physiology - Volume 222, March 2018, Pages 39-50
نویسندگان
Maria Celeste Dias, Diana C.G.A. Pinto, Carlos Correia, José Moutinho-Pereira, Helena Oliveira, Helena Freitas, Artur M.S. Silva, Conceição Santos,