Effect of Infection by Hypomyces solani f. sp. Cucurbitac on Apparent Free Space, Cell Membrane Permeability, and Respiration of Squash Hypocotyls
- 1 October 1968
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 43 (10), 1666-1672
- https://doi.org/10.1104/pp.43.10.1666
Abstract
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.Keywords
This publication has 7 references indexed in Scilit:
- Effect of the Specific Toxin in Helminthosporium victoriae on Host Cell MembranesPlant Physiology, 1968
- Effect of ethylene on the permeability of excised cantaloupe fruit tissue.Plant Physiology, 1967
- Reversible Changes in the Hydraulic Permeability of Plant Cell MembranesPlant Physiology, 1964
- Relationship of Solute Leakage to Solution Tonicity in Fruits and Other Plant TissuesPlant Physiology, 1964
- Studies on Auxin-membrane Permeability Relations in Fruit and Leaf TissuesPlant Physiology, 1959
- On the Distinction between the Effects of Agents on Active and Passive Transport of IonsScience, 1957
- A modified ninhydrin colorimetric analysis for amino acidsArchives of Biochemistry and Biophysics, 1957