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Two patterns of leaf photosynthetic response to irradiance transition from saturating to limiting one in some plant species
Author(s) -
Chen Yue,
Xu DaQuan
Publication year - 2006
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2005.01624.x
Subject(s) - photosynthesis , photosystem ii , chlorophyll fluorescence , limiting , irradiance , electron transport chain , botany , photoinhibition , biology , chlorophyll , dissociation (chemistry) , light intensity , fluorescence , non photochemical quenching , chemistry , physics , optics , mechanical engineering , engineering
Summary• Plants often regulate the amount and size of light‐harvesting antenna (LHCII) to maximize photosynthesis at low light and avoid photodamage at high light. • Gas exchange, 77 K chlorophyll fluorescence, photosystem II (PSII) electron transport as well as LHCII protein were measured in leaves irradiated at different light intensities. • After irradiance transition from saturating to limiting one leaf photosynthetic rate in some species such as soybean and rice declined first to a low level, then increased slowly to a stable value (V pattern), while in other species such as wheat and pumpkin it dropped immediately to a stable value (L pattern). Saturating pre‐irradiation led to significant declines of both 77 K fluorescence parameter F685/F735 and light‐limited PSII electron transport rate in soybean but not in wheat leaves, indicating that some LHCIIs dissociate from PSII in soybean but not in wheat leaves. • The L pattern of LHCII‐decreased rice mutant and the V pattern of its wild type demonstrate that the V pattern is linked to dissociation/reassociation of some LHCIIs from/to PSII.