Biphasic Inhibition of Photosynthesis in Powdery Mildewed Barley
- 1 May 1970
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 45 (5) , 594-597
- https://doi.org/10.1104/pp.45.5.594
Abstract
A careful restudy of the photosynthetic process of barley (Hordeum vulgare) infected with powdery mildew (Erysiphe graminis f. sp. hordei) is reported. Unlike previous reports, which indicated a stimulation in infected host tissue photosynthesis during early stages of the disease followed by a rapid decline in activity, this study observed no stimulation but instead a biphasic inhibition in infected host photosynthesis under physiological concentrations of CO2. Under high CO2 (1.0%) a stimulation was observed during early stages of infection. The inhibition in low CO2 and stimulation in high CO2 of infected host photosynthesis was shown to occur in healthy host tissue when in the presence of 10−2m α-hydroxy-2-pyridinemethanesulfonic acid. The possible significance of these similar results is discussed.Keywords
This publication has 6 references indexed in Scilit:
- Distribution of the Products of Photosynthesis between Powdery Mildew and BarleyPlant Physiology, 1966
- Metabolic Regulation in Diseased Leaves. I. The Respiratory Rise in Barley Leaves Infected with Powdery MildewPlant Physiology, 1966
- PRIMARY INFECTION OF WHEAT AND BARLEY BY ERYSIPHE GRAMINIS1966
- The Relation of Glycolic Acid Synthesis to the Primary Photosynthetic Carboxylation Reaction in LeavesJournal of Biological Chemistry, 1965
- Respiratory changes in barley leaves produced by single colonies of powdery mildewPlant Physiology, 1962
- Induction of Disease Symptoms in Barley by Powdery MildewPlant Physiology, 1962