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Comparative effectiveness of metal ions in inducing curvature of primary roots of Zea maysWe used five cultivars of Zea mays (Bear Hybrid WF9 * 38MS, B73 * Missouri 17, Yellow Dent, Merit, and Great Lakes Hybrid 422) to reinvestigate the specificity of metal ions for inducing root curvature. Of 17 cations tested, 6 (Al3+, Ba2+, Ca2+, Cd2+, Cu2+, Zn2+) induced curvature. Roots curved away from Al3+, Ba2+, and Cd2+. Roots curved away from low (0.1 millimolar) concentrations of Cu2+ but toward higher (1-5 millimolar) concentrations. Roots initially curved away from Zn2+ but the direction of the subsequent curvature was unpredictable. In most cases, roots of all cultivars curved towards calcium. However, in some tests there was no response to calcium or even (especially in the cultivars Merit and B73 * Missouri 17) substantial curvature away from calcium. The results indicate that the induction of root curvature is not specific for calcium. The results are discussed relative to the possible role of calmodulin as a mediator of ion-induced root curvature.
Document ID
20040090130
Document Type
Reprint (Version printed in journal)
Authors
Hasenstein, K. H. (Ohio State University Columbus 43210, United States)
Evans, M. L.
Stinemetz, C. L.
Moore, R.
Fondren, W. M.
Koon, E. C.
Higby, M. A.
Smucker, A. J.
Date Acquired
August 21, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Plant physiology
Volume: 86
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-297
CONTRACT_GRANT: PCM 8305775
CONTRACT_GRANT: NAGW-734
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Plant Biology
NASA Program Space Biology
Non-NASA Center
NASA Discipline Number 40-10