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Plant Physiology 56:845-846 (1975)
© 1975 American Society of Plant Biologists

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Articles

Mechanical Inhibition of Hypocotyl Elongation Induces Radial Enlargement

Implications for Cytokinin Action 1

Terri S. Victor and Larry N. Vanderhoef

a Department of Botany, University of Illinois, Urbana, Illinois 61801

Excised elongating segments from 3-day-old soybean (Glycine max var. Wayne) seedlings radially enlarged when auxin-promoted elongation was mechanically inhibited. Growth was similar to segments treated with auxin plus cytokinin. This observation suggests that cytokinin does not necessarily directly "reorient" cell enlargement. Cytokinin-induced radial cell growth may be a secondary effect of cytokinin's inhibition of auxin-promoted elongation.

1 This research was supported by grants from the National Science Foundation (GB-36586, BMS72-02496), the University of Illinois Graduate Research Board, and the Department of Health, Education, and Welfare (Biomedical Sciences support grant to the University of Illinois).




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E. W. Chehab, E. Eich, and J. Braam
Thigmomorphogenesis: a complex plant response to mechano-stimulation
J. Exp. Bot., January 1, 2009; 60(1): 43 - 56.
[Abstract] [Full Text] [PDF]


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Copyright © 1975 by the American Society of Plant Biologists