Photosynthetic responses of sun- and shade-grown barley leaves to high light: is the lower PSII connectivity in shade leaves associated with protection against excess of light?
Photosynthetic responses of sun- and shade-grown barley leaves to high light: is the lower PSII connectivity in shade leaves associated with protection against excess of light?
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DOI：
10.1007/s11120-014-9969-8
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发表时间：
2014-03
影响因子：
3.7
通讯作者：
Govindjee
中科院分区：
文献类型：
--
作者：
Zivcak, Marek;Brestic, Marian;Kalaji, Hazem M.;Govindjee
关键词：
在本研究中，我们比较了大麦叶片（Hordeum vulgare L.）在整个生育期和田间条件下在阳光和遮光条件下生长的光合性能。分析基于慢速和快速叶绿素（Chl） a荧光动力学、气体交换、色素组成的测量；以及它们生长过程中照射在叶子上的光。遮荫和光照下的大麦叶片Chl a/b和Chl/类胡萝卜素的比值相似。荧光诱导分析揭示了遮阳叶和遮阴叶之间的主要功能差异：光系统II （PSII）之间的连通性较低，电子载流子数量减少，PSII和PSI之间的电子传递受到限制；但PSII天线的尺寸差异很小。我们讨论了遮荫叶片中PSII单元之间的低连通性在保持高光条件下较低的生理上更可接受的激发压力方面可能的保护作用。本文的在线版本（doi:10.1007/s11120-014-9969-8）包含补充材料，仅供授权用户使用。
In this study, we have compared photosynthetic performance of barley leaves (Hordeum vulgare L.) grown under sun and shade light regimes during their entire growth period, under field conditions. Analyses were based on measurements of both slow and fast chlorophyll (Chl) a fluorescence kinetics, gas exchange, pigment composition; and of light incident on leaves during their growth. Both the shade and the sun barley leaves had similar Chl a/b and Chl/carotenoid ratios. The fluorescence induction analyses uncovered major functional differences between the sun and the shade leaves: lower connectivity among Photosystem II (PSII), decreased number of electron carriers, and limitations in electron transport between PSII and PSI in the shade leaves; but only low differences in the size of PSII antenna. We discuss the possible protective role of low connectivity between PSII units in shade leaves in keeping the excitation pressure at a lower, physiologically more acceptable level under high light conditions. The online version of this article (doi:10.1007/s11120-014-9969-8) contains supplementary material, which is available to authorized users.
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影响因子：
6.5
作者：
Brestic, Marian;Zivcak, Marek;Allakhverdiev, Suleyman I.
通讯作者：
Allakhverdiev, Suleyman I.
DOI：
10.1016/0005-2728(84)90166-x
发表时间：
1984-01-01
期刊：
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子：
--
作者：
BRADBURY, M;BAKER, NR
通讯作者：
BAKER, NR
影响因子：
4.3
作者：
Bailey, S;Walters, RG;Horton, P
通讯作者：
Horton, P
影响因子：
7.4
作者：
Falbel, TG;Meehl, JB;Staehelin, LA
通讯作者：
Staehelin, LA
影响因子：
5.7
作者：
Cascio, Chiara;Schaub, Marcus;Strasser, Reto J.
通讯作者：
Strasser, Reto J.