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C4 photosynthesis and water stress

Annals of Botany · 2008 · Vol. 103(4) · pp. 635–644
Oula Ghannoum

Abstract

It is suggested that there is a limited capacity for photorespiration or the Mehler reaction to act as significant alternative electron sinks under water stress in C(4) photosynthesis. This may explain why C(4) photosynthesis is equally or even more sensitive to water stress than its C(3) counterpart in spite of the greater capacity and water use efficiency of the C(4) photosynthetic pathway.

Photosynthetic Processes and MechanismsPlant responses to elevated CO2Atmospheric and Environmental Gas DynamicsPhotorespirationPhotosynthesisBiologyC4 photosynthesisWater stressFight-or-flight responseBotanyMechanism (biology)Biochemistry

MeSH terms

CarbonCarbon DioxideDehydrationPhotosynthesisWaterPlant StomataDroughts
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C4 photosynthesis and water stress
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