Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 559777
Title The relationship between CO2 assimilation and electron transport in leaves
Author(s) Harbinson, Jeremy; Genty, Bernard; Baker, Neil R.
Source Photosynthesis Research 25 (1990)3. - ISSN 0166-8595 - p. 213 - 224.
DOI https://doi.org/10.1007/BF00033162
Publication type Refereed Article in a scientific journal
Publication year 1990
Keyword(s) Hedera helix - photorespiration - photosystem I - photosystem II - Pisum sativum - quantum efficiency
Abstract

The inter-relationships between the quantum efficiencies of photosystems I (φI) and II (φII) and the quantum yield of CO2 fixation {Mathematical expression} were investigated in pea (Pisum sativum (L)) leaves with differing rates of photosynthesis using both photorespiratory and non-photorespiratory conditions, and in a leaf of Hedera helix (L) under photorespiratory conditions. The results indicate that under photorespiratory conditions the relationship between {Mathematical expression} and both φI and φII is non-linear and variable. The relationship between φI and φII under these circumstances remains predominantly linear. Under non-photorespiratory conditions, leaves with a low rate of photosynthesis due to sink limitation exhibit a non-linear relationship between φI and φII, though the relationship between φI and φII remains linear suggesting a close relationship between linear electron flow and CO2 fixation. Leaves irradiated at the CO2 compensation point also exhibit a non-linear relationship between φI and φII. These results suggest that for leaves in air linear electron flow is the predominant source of energy for metabolism. The role of cyclic electron transport is considered when the requirement for the products of linear electron transport is depressed.

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