Morris Cline
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Dr.
Morris Cline
Associate Emeritus Professor
Ph.D., University of Michigan, 1964.
Contact:
The Ohio State University
Plant Cellular and Molecular Biology
564 Aronoff Laboratory
318 West 12th Avenue
Columbus, OH 43210
Office: 614.292.5213
Laboratory: 614.292.0238
Fax: 614.292.6345
e-Mail: Cline.5@osu.edu
Focus:
Developmental control mechanisms of apical dominance.
Research Interests:
Plants respond to changes in the environment (e.g., light, temperature, gravity, wind, herbivores) in remarkable ways which enhance their probability of survival. Appropriate photoperiods will induce a plant to flower at a favorable time in the growing season to insure plentiful seed production. When wind or foraging animals damage the terminal bud of a vegetative shoot, the next lower axillary bud often will grow out in its place. What is the signal that releases this bud? What are the biochemical and genetic control mechanisms of apical dominance and sylleptic branching? In the case of woody plants, how do these mechanisms interface with winter dormancy? Dr. Cline's current research focuses on the role of auxin, cytokinin and nutrients in these processes.
Teaching:
Selected publications (1994 - Date):
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Cline, M.G., 1994. The role of hormones in apical dominance. New approaches to an old problem in plant development. Physiologia Plantarum 90: 230-237. (A mini-review)
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Cline, M.G. 1996. Exogenous auxin effects on lateral bud outgrowth in decapitated shoots. Annals of Botany 78: 255-266.
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Cline, M.G. 1996. Gravity effects on the shoot of Japanese morning glory. In: Plants in Space Biology. H. Suge (ed.) Tohoku Univ. pp. 167-174.
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Cline, M.G. 1997. Concepts and terminology of apical dominance. American Journal of Botany 84:1064-1069.
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Cline, M.G., T. Wessel and H. Iwamura. 1997. Cytokinin/auxin control of apical dominance in Ipomea nil. Plant Cell Physiology 38: 659-667.
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Cline, M.G. and D. Deppong (1999) The role of apical dominance in paradormancy of temperate woody plants: A reappraisal. Journal of Plant Physiology 155: 350-356.
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Cline, M.G. and D. Deppong (2000) Do leaves control episodic growth in woody plants? Ohio Journal of Science 100:19-23.
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Cline, M.G. (2000) Execution of the auxin replacement apical dominance experiment in temperate woody species. American Journal of Botany 87: 182-190.
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Cline, M.G., S.P. Chatfield and O. Leyser (2001) NAA restores apical dominance in the axr3-1 mutant of Arabidopsis thaliana. Annals of Botany 87: 61-65.
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Cline, M.G. and K. Dong-Il (2002) A Preliminary investigation of the role of auxin and cytokinin in sylleptic branching of three hybrid poplar clones exhibiting contrasting degrees of sylleptic branching. Annals of Botany 90: 417-421.
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Cline, M.G. and K. Sadeski (2002) Is auxin the repressor signal of branch growth in apical control? American Journal of Botany 89:1764-1771
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Cline, M.G., M. Thangavelu and K. Dong-Il (2006 Short Communication) A possible role of cytokinin in mediating long-distance nitrogen signaling in the promotion of sylleptic branching in hybrid poplar. J. Plant Physiol. 163: 684-688.
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Cline, M.G., M. Yoders, D. Desai, C. Harrington and W. Carlson (2006) Hormonal control of second flushing in Douglas-fir shoots. Tree Physiol. 26: 1369-1375.
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Cline, M.G. and Choonseok Oh (2006) A reappraisal of the role of abscisic acid and its interaction with auxin in apical dominance. Ann. Botany 98: 891-897.
