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Effect of Infection by Hypomyces solani f. sp. Cucurbitac on Apparent Free Space, Cell Membrane Permeability, and Respiration of Squash Hypocotyls



Effect of Infection by Hypomyces solani f. sp. Cucurbitac on Apparent Free Space, Cell Membrane Permeability, and Respiration of Squash Hypocotyls



Plant Physiology 43(10): 1666-1672



Initial symptoms and increases in respiration, apparent free space, and rate of leakage of amino acids occurred concomitantly in squash (Cucurbita maxima Dcne) hypocotyls infected by Hypomyces solani f. sp. cucurbitae Snyd. and Hans. Young, rapidly expanding lesions had greater respiratory rates and apparent free space than comparable tissues from healthy plants.Hypocotyl tissues above (1-45 mm) lesions possessed greater endogenous respiratory rates (2-3 times) and lower respiratory quotients than similar tissues from healthy plants. But no differences were found in membrane permeability to nonelectrolytes and water and in apparent free space between cells above lesions and healthy hypocotyls.Host cells contiguous to fungal hyphae at lesion margins were completely permeable to solutes and failed to accumulate neutral red or exhibit cyclosis.

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Accession: 048864819

Download citation: RISBibTeXText

PMID: 16656953

DOI: 10.1104/pp.43.10.1666


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Effect of Infection by Hypomyces solani F. Sp. Cucurbitae on Apparent Free Space, Cell Membrane Permeability, and Respiration of Squash Hypocotyls. Plant Physiology 43(10): 1666-1672, 1968

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