کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6493707 | 44418 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light piping driven photosynthesis in the soil: Low-light adapted active photosynthetic apparatus in the under-soil hypocotyl segments of bean (Phaseolus vulgaris)
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کلمات کلیدی
PchlideChlPFDY(NPQ)ROS - ROSaquaporin - آکواپورینLHC - برخورد دهنده بزرگ هادرون Leaf - برگphoton flux density - تراکم شار فوتونGreening - سبزChlorophyll - سبزینه یا کلروفیلPhotosystem - سیستم عکسChlorophyll fluorescence - فلورسانس کلروفیلLight harvesting complex - مجتمع برداشت نورY(NO) - و (نه)plasma membrane intrinsic protein - پروتئین ذاتی غشاء پلاسماChlorophyll-protein complex - پروتئین کلروفیل پیچیدهProtochlorophyllide - پروتوکلروفی فیلPiP - پیپReactive oxygen species - گونههای فعال اکسیژنY(II) - ی (دوم)
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Photosynthetic activity was identified in the under-soil hypocotyl part of 14-day-old soil-grown bean plants (Phaseolus vulgaris L. cv. Magnum) cultivated in pots under natural light-dark cycles. Electron microscopic, proteomic and fluorescence kinetic and imaging methods were used to study the photosynthetic apparatus and its activity. Under-soil shoots at 0-2 cm soil depth featured chloroplasts with low grana and starch grains and with pigment-protein compositions similar to those of the above-soil green shoot parts. However, the relative amounts of photosystem II (PSII) supercomplexes were higher; in addition a PIP-type aquaporin protein was identified in the under-soil thylakoids. Chlorophyll-a fluorescence induction measurements showed that the above- and under-soil hypocotyl segments had similar photochemical yields at low (10-55 μmol photons mâ 2 sâ 1) light intensities. However, at higher photon flux densities the electron transport rate decreased in the under-soil shoot parts due to inactivation of the PSII reaction centers. These properties show the development of a low-light adapted photosynthetic apparatus driven by light piping of the above-soil shoot. The results of this paper demonstrate that the classic model assigning source and sink functions to above- and under-soil tissues is to be refined, and a low-light adapted photosynthetic apparatus in under-soil bean hypocotyls is capable of contributing to its own carbon supply.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 161, August 2016, Pages 422-429
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 161, August 2016, Pages 422-429
نویسندگان
Andrea Kakuszi, Ãva Sárvári, Ádám Solti, Gyula Czégény, Ãva Hideg, Ãva Hunyadi-Gulyás, Károly Bóka, Béla Böddi,