HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kittle, D. R. Articles by Gray, L. E. Search for Related Content PubMed Articles by Kittle, D. R. Articles by Gray, L. E. Agricola Articles by Kittle, D. R. Articles by Gray, L. E.

Effects of Infection by Phytophthora megasperma var. sojae on the Water Relations of Soybean¹

Soybeans infected by Phytophthora megasperma var. sojae had reduced transpiration rates, lower leaf water potentials, smaller leaves, and higher leaf temperatures than noninfected ones. Flow rates of water through infected soybean roots were one-tenth those through healthy roots. Recovery from water stress by infected plants was slower than that observed among healthy plants. A 20-fold greater whole root resistance to water flow was observed in excised roots of infected plants compared to controls. The influence of infection on root resistance greatly exceeded the influence of infection on the size of root systems.

Key Words: Glycine max (L.) Merr. • Root and stem rot of soybeans

² Mention of a trademark or proprietary product does not constitute a guarantee or warranty of the product by USDA, and does not imply its approval to the exclusion of other products that may also be suitable.

Received for publication September 20, 1979.