Carbon Dioxide Exchange in an Incompatible Barley/Powdery Mildew Combination | Zendy

Walters D. R. | Zendy; Ayres P. G. | Zendy

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Carbon Dioxide Exchange in an Incompatible Barley/Powdery Mildew Combination

Author(s) -

Walters D. R.,

Ayres P. G.

Publication year - 1983

Publication title -

journal of phytopathology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.53

H-Index - 60

eISSN - 1439-0434

pISSN - 0931-1785

DOI - 10.1111/j.1439-0434.1983.tb00065.x

Subject(s) - powdery mildew , photosynthesis , photorespiration , biology , inoculation , carbon dioxide , agronomy , mildew , carbon fixation , botany , horticulture , ecology

CO 2 exchanges in intact barley leaves were studied by infra red gas analysis after inoculation with an incompatible race of powdery mildew. Net photosynthesis was inhibited, and dark and photorespiration were stimulated, by inoculation. The increase in respiratory processes was approximately equal to the change in net photosynthesis indicating that CO 2 fixation, “gross photosynthesis”, was unaffected by inoculation. It is concluded that changes in net photosynthesis may be the primary cause of the reduced quantity and quality of grain in incompatible barley/mildew combinations.

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