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Evidence for a transmissible factor that causes rapid stomatal closure in soybean at sites adjacent to and remote from hypersensitive cell death induced by Phytophthora sojae

journal contribution
posted on 1999-09-01, 00:00 authored by K L McDonald, David CahillDavid Cahill
In the incompatible interaction of soybean cultivar Harosoy 1272 with race 1 of P. sojae there were rapid changes in stomatal physiology following leaf inoculation. Within 2 h stomata at the infection site were fully closed and stomata located on the same leaflet that were 3 and 20 mm from the inoculation site were also closed. In contrast, in the compatible interaction of cultivar Harosoy with race 1 stomata closed only slowly or remained open at all sites. After 8 h in incompatible interactions stomata opened to preinoculation levels. Treatment of leaves with the abiotic elicitor, silver nitrate, and wounding did not induce systemic stomatal closure in either cultivar. Closure of stomata in the incompatible interaction is apparently brought about by a transmissible signal that is derived from cells that react hypersensitively to pathogen invasion.

History

Journal

Physiological and Molecular Plant Pathology

Volume

55

Issue

3

Pagination

197 - 203

Publisher

Academic Press [Elsevier Science & Technology]

Location

London, Eng.

ISSN

0885-5765

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1999, Academic Press