Role of calcium ion in protection against heat and high irradiance stress-induced oxidative damage to photosynthesis of wheat leaves

Title:

Role of calcium ion in protection against heat and high irradiance stress-induced oxidative damage to photosynthesis of wheat leaves

Creator:

Zhao, Hui-Jie and Tan, Ji-Fang

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f4996131-b910-411d-965e-925f10f703d7
uuid:f4996131-b910-411d-965e-925f10f703d7
issn:0300-3604
doi:10.1007/s11099-005-0076-0

Subject:

cross stress of heat and high irradiance, ethyleneglycol-di(2-aminoethylether)-tetraacetic acid, lanthanum (III) chloride, photosynthesis, and Triticum

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Cross stress of heat and high irradiance (HI) resulted in the accumulation of active oxygen species and photo-oxidative damage to photosynthetic apparatus of wheat leaves during grain development. Pre-treatment with calcium ion protected the photosynthetic system from oxidative damage by reducing O-2 production, inhibiting lipid peroxidation, and retarding electrolyte leakage from cell. Therefore, high Fv/Fm [maximal photochemical efficiency of photosystem 2 (PS2) while all PS2 reaction centres are open], Fm/F0 (another expression for the maximal photochemical efficiency of PS2), ΦPS2 (actual quantum yield of PS2 under actinic irradiation), qP (photochemical quenching coefficient), and PN (net photosynthetic rate) were maintained, and lower qNP (non-photochemical quenching coefficient) of the leaves was kept under heat and HI stress. EGTA (a chelant of calcium ion) and LaCl3 (a blocker of Ca2+ channel in cytoplasmic membrane) had the opposite effect. Thus Ca ion may help protect the photosynthetic system of wheat leaves from oxidative damage induced by the cross stress of heat and HI. and Hui-Jie Zhao, Ji-Fang Tan.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

473-476

Source:

Photosynthetica | 2005 Volume:43 | Number:3

Harvested from:

CDK

Metadata only:

false