RESOLUTION OF COMPONENTS OF NONPHOTOCHEMICAL CHLOROPHYLL FLUORESCENCE QUENCHING IN BARLEY LEAVES

被引：263

作者：

WALTERS, RG

HORTON, P

机构：

[1] Robert Hill Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, S10 2TN, Western Bank

来源：

PHOTOSYNTHESIS RESEARCH | 1991年 / 27卷 / 02期

关键词：

HIGH-ENERGY STATE QUENCHING; PHOTOINHIBITION; PHOTOSYNTHESIS; STATE TRANSITION; 77-K FLUORESCENCE;

D O I：

10.1007/BF00033251

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Non-photochemical chlorophyll fluorescence quenching (qN) in barley leaves has been analysed by monitoring its relaxation in the dark, by applying saturating pulses of light. At least three kinetically distinct phases to qN recovery are observed, which have previously been identified (Quick and Stitt 1989) as being due to high-energy state quenching ('fast'), excitation energy redistribution due to a state transition ('medium') and photoinhibition ('show'). However, measurements of chlorophyll fluorescence at 77 K from leaf extracts show that state transitions only occur in low light conditions, whereas the 'medium' component of qN is very large in high light. The source of that part of the 'medium' component not accounted for by a state transition is discussed.

引用

页码：121 / 133

页数：13

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