Effects of Powdery Mildew and Water Stress on CO2 Exchange in Uninfected Leaves of Barley | Zendy

Gillian M. Williams | Zendy; P. G. AYRES | Zendy

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Effects of Powdery Mildew and Water Stress on CO₂ Exchange in Uninfected Leaves of Barley

Author(s) -

Gillian M. Williams,

P. G. AYRES

Publication year - 1981

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.68.3.527

Subject(s) - powdery mildew , photosynthesis , biology , water stress , seedling , stomatal conductance , agronomy , botany , hordeum vulgare , poaceae , horticulture

Net photosynthesis is stimulated in third seedling leaves of barley plants whose lower two leaves are heavily infected by Erysiphe graminis f.sp. hordei Marchal. Stimulation is greater in water-stressed than in well-watered plants. In stressed, but not in well-watered plants, stimulation is associated with the maintenance of high leaf water potential and high leaf conductance. A small part of the changes in net photosynthesis is attributable to changes in respiratory metabolism in the third leaf, and other possible causes are discussed.

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