کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8358202 | 1542062 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High root temperature affects the tolerance to high light intensity in Spathiphyllum plants
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کلمات کلیدی
NDHChlororespirationNdh complexPGR5NADH dehydrogenasePTOXF′mPPFDPAMNon-photochemical quenching - خنک سازی غیر فتوشیمیاییPhotosystem - سیستم عکسFluorescence yield - عملکرد فلورسانسPhotosynthesis - فتوسنتزphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونVariable fluorescence - فلورسانس متغیرpulse amplitude modulation - مدولاسیون دامنه پالسplastid terminal oxidase - پلاستیک ترمینال اکسیدازY(II) - ی (دوم)
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Spathiphyllum wallisii plants were sensitive to temperature stress under high illumination, although the susceptibility of leaves to stress may be modified by root temperature. Leaves showed higher tolerance to high illumination, in both cold and heat conditions, when the roots were cooled, probably because the chloroplast were protected by excess excitation energy dissipation mechanisms such as cyclic electron transport. When the roots were cooled both the activity of electron donation by NADPH and ferredoxin to plastoquinone and the amount of PGR5 polypeptide, an essential component of cyclic electron flow around PSI, increased. However, when the stems were heated or cooled under high illumination, but the roots were heated, the quantum yield of PSII decreased considerably and neither the electron donation activity by NADPH and ferredoxin to plastoquinone nor the amount of PGR5 polypeptide increased. In such conditions, the cyclic electron flow cannot be enhanced by high light and PSII is damaged as a result of insufficient dissipation of excess light energy. Additionally, the damage to PSII induced the increase in both chlororespiratory enzymes, NDH complex and PTOX.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 227, October 2014, Pages 84-89
Journal: Plant Science - Volume 227, October 2014, Pages 84-89
نویسندگان
Adriana Soto, Laura Hernández, MarÃa José Quiles,