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Inhibition of polar calcium movement and gravitropism in roots treated with auxin-transport inhibitorsPrimary roots of maize (Zea mays L.) and pea (Pisum sativum L.) exhibit strong positive gravitropism. In both species, gravistimulation induces polar movement of calcium across the root tip from the upper side to the lower side. Roots of onion (Allium cepa L.) are not responsive to gravity and gravistimulation induces little or no polar movement of calcium across the root tip. Treatment of maize or pea roots with inhibitors of auxin transport (morphactin, naphthylphthalamic acid, 2,3,5-triiodobenzoic acid) prevents both gravitropism and gravity-induced polar movement of calcium across the root tip. The results indicate that calcium movement and auxin movement are closely linked in roots and that gravity-induced redistribution of calcium across the root cap may play an important role in the development of gravitropic curvature.
Document ID
20040120799
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lee, J. S.
(Ohio State University Columbus 43210, United States)
Mulkey, T. J.
Evans, M. L.
Date Acquired
August 22, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Planta
Volume: 160
ISSN: 0032-0935
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: PCM 8305775
CONTRACT_GRANT: NAGW-297
CONTRACT_GRANT: PCM 8103298
Distribution Limits
Public
Copyright
Other

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