کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8959365 | 1646309 | 2019 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Do metabolic changes underpin physiological responses to water limitation in alfalfa (Medicago sativa) plants during a regrowth period?
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کلمات کلیدی
NODambient CO2 concentrationF6PG6PTHRASNGLNToMORNMSTFAMEVRWCTFAPPFDBNFOPATrpGC-C-IRMSVcmaxArginine - آرژنین Asparagine - آسپاراژینArg - ارگTrifluoracetic acid - اسید Trifluoraceticgamma-aminobutyric acid - اسید گاما آمینو بوتیریکornithine - اورنیتینSER - برای بودنBiological nitrogen fixation - تثبیت نیتروژن بیولوژیکthreonine - ترئونینTryptophan - تریپتوفانJmax - جماکسSerine - سرینretention index - شاخص نگهداریgas chromatography combustion isotope ratio mass spectrometry - طیف سنجی جرم نسبت کروماتوگرافی گاز احتراق گازintercellular CO2 concentration - غلظت CO2 بین سلولیphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونfructose-6-phosphate - فروکتوز 6-فسفاتLysine - لیزینLYS - لیستTotal organic matter - ماده آلی کلMethionine - متیونینRelative water content - محتوای آب نسبیstomatal limitation - محدودیت دیمنتMET - ملاقات کردLeaf transpiration rate - نرخ تبخیر برگPRO - نرم افزارNodule - نودولNitrogen - نیتروژنLeaf stomatal conductance - هدایت ورقه ورقه برگProline - پرولینCarbon - کربنhigh performance liquid chromatography - کروماتوگرافی مایع با کارایی بالاHPLC - کروماتوگرافی مایعی کاراGABA - گاباGlu - گلوglutamate - گلوتاماتglutamine - گلوتامینglucose-6-phosphate - گلوکز 6-فسفاتGly - گلیGlycine - گلیسین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
Drought is one of the most limiting factors on crop productivity under Mediterranean conditions, where the leguminous species alfalfa (Medicago sativa L.) is extensively cultivated. Whereas the effect of drought on plant performance has been widely described at leaf and nodule levels, less attention has been given to plant-nodule interactions and their implication on metabolites exchange during a regrowth period, when water is limiting. For this purpose, physiological characterization and metabolite profiles in different plant organs and nodules were undertaken under water deficit, including regrowth after removal of aerial parts. In order to study in more detail how nitrogen (N) metabolism was affected by water stress, plants were labelled with N-enriched isotopic air (15N2) using especially designed chambers. Water stress affected negatively water status and photosynthetic machinery. Metabolite profile and isotopic composition analyses revealed that, water deficit induced major changes in the accumulation of amino acids (proline, asparagine, histidine, lysine and cysteine), carbohydrates (sucrose, xylose and pinitol) and organic acids (fumarate, succinate and maleic acid) in the nodules in comparison with other organs. The lower 15N-labeling observed in serine, compared with other amino acids, was related with its high turnover rate, which in turn, indicates its potential implication in photorespiration. Isotopic analysis of amino acids also revealed that proline synthesis in the nodule was a local response to water stress and not associated with a feedback inhibition from the leaves. Water deficit induced extensive reprogramming of whole-plant C and N metabolism, including when the aerial part was removedto trigger regrowth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 212, 1 February 2019, Pages 1-11
Journal: Agricultural Water Management - Volume 212, 1 February 2019, Pages 1-11
نویسندگان
Gemma Molero, Guillaume Tcherkez, Regina Roca, Caroline Mauve, Llorenç Cabrera-Bosquet, José Luis Araus, Salvador Nogués, Iker Aranjuelo,