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Effects of Manganese Deficiency on Spectral Characteristics and Oxygen Evolution in Maize Chloroplasts

Author:
Gong, Xiaolan, Wang, Ying, Liu, Chao, Wang, Sisi, Zhao, Xiaoyang, Zhou, Min, Li, Na, Lu, Yun, Hong, Fashui
Source:
Biological trace element research 2010 v.136 no.3 pp. 372-382
ISSN:
0163-4984
Subject:
absorption, carotenoids, chlorophyll, chloroplasts, corn, energy transfer, manganese, oxygen production, spectral analysis, tyrosine
Abstract:
The effects of Mn²⁺ deficiency on light absorption, transmission, and oxygen evolution of maize chloroplasts were investigated by spectral methods. Several effects of Mn²⁺ deficiency were observed: (1) the skeleton of pigment protein complexes and oxygen-evolving center and the combination between pigment and protein were damaged; (2) the light absorption of chloroplasts was obviously decreased; (3) the energy transfer among amino acids within PS II protein-pigment complex and decreased energy transport from tyrosine residue to chlorophyll a and from chlorophyll b and carotenoid to chlorophyll a were inhibited; (4) the oxygen-evolving of chloroplast was significantly inhibited. However, Mn²⁺ addition decreased the damage of light absorption, transmission, and oxygen evolution of maize chloroplasts caused by Mn²⁺ deficiency.
Agid:
286230