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

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (17) Citing Articles via Google Scholar Google Scholar Articles by Cipollini, D. F. Search for Related Content PubMed Articles by Cipollini, D. F., Jr. Agricola Articles by Cipollini, D. F.

The induction of soluble peroxidase activity in bean leaves by wind-induced mechanical perturbation¹

^a Department of Entomology, Pesticide Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802

The induction of defense-related peroxidase (POD) activity in plants occurs in response to many biotic and abiotic stimuli. This controlled greenhouse study was an attempt to provide insight into the nature of the induction of soluble POD activity by noninjurious wind-induced mechanical perturbation (MP). In a time course study, exposure of common bean (Phaseolus vulgaris) seedlings to daily periods of fan-produced wind induced a significant and sustained increase in soluble POD activity in primary leaves of 7–9-d-old seedlings. In a wind-gradient study, wind-induced MP led to increases in soluble POD activity in leaves that were proportionally related to the wind speed experienced by individual seedlings. Wind-induced MP enhanced soluble POD activity to a degree similar to treatment with 5 mmol/L HgCl₂, a potent oxidizing elicitor of POD activity in plants. However, no further increases in POD activity were induced by HgCl₂ on plants that were preconditioned with wind-induced MP. Finally, short periods of brushing-induced MP enhanced soluble POD activity to the same degree as longer periods of wind-induced MS, suggesting a greater sensitivity to thigmic stimuli than to seismic stimuli in leaves of bean seedlings. This study illustrates the potential importance of wind and other mechanical stimuli as inducers of POD activity and interacting factors in the elicitation of POD activity by other environmental stimuli.

Key Words: bean • brushing • Fabaceae • mechanical perturbation • mercuric chloride • peroxidase • Phaseolus vulgaris • wind

This article has been cited by other articles:

				D. S. Hik, M. Brown, A. Dabros, J. Weir, and J. F. Cahill Jr Prevalence and predictability of handling effects in field studies: results from field experiments and a meta-analysis Am. J. Botany, February 1, 2003; 90(2): 270 - 277. [Abstract] [Full Text] [PDF]

				J. F. Cahill Jr., J. P. Castelli, and B. B. Casper Separate effects of human visitation and touch on plant growth and herbivory in an old-field community Am. J. Botany, September 1, 2002; 89(9): 1401 - 1409. [Abstract] [Full Text] [PDF]

				D. Cipollini Variation in the expression of chemical defenses in Alliaria petiolata (Brassicaceae) in the field and common garden Am. J. Botany, September 1, 2002; 89(9): 1422 - 1430. [Abstract] [Full Text] [PDF]