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The effect of ethylene on root growth of Zea mays seedlingsThe control of primary root growth in Zea mays cv. Merit by ethylene was examined. At applied concentrations of ethylene equal to or greater than 0.1 microliter L-1, root elongation during 24 h was inhibited. The half-maximal response occurred at 0.6 microliter L-1 and the response saturated at 6 microliters L-1. Inhibition of elongation took place within 20 min. However, after ethylene was removed, elongation recovered to control values within 15 min. Root elongation was also inhibited by green light. The inhibition caused by a 24-h exposure to ethylene was restricted to the elongating region just behind the apex, with inhibition of cortical cell elongation being the primary contributor to the effect. Based on use of 2,5-norbornadiene, a gaseous competitive inhibitor of ethylene, it was concluded that endogenous ethylene normally inhibits root elongation.
Document ID
20040090298
Document Type
Reprint (Version printed in journal)
Authors
Whalen, M. C. (University of California Berkeley 94720)
Feldman, L. J.
Date Acquired
August 21, 2013
Publication Date
April 1, 1988
Publication Information
Publication: Canadian journal of botany
Volume: 66
Issue: 4
ISSN: 0008-4026
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 40-10
NASA Discipline Plant Biology
Non-NASA Center
NASA Program Space Biology