Role of Growth Hormones in Unpredictable Reproductive Behaviour of Cedrus deodara
DOI:
https://doi.org/10.36808/if/2020/v146i5/144162Keywords:
Cedrus deodara, Monoecious, Dioecious, Diplohaplontic, Axuxin, Gibberellic Acid.Abstract
The diplohalontic life cycle of conifers with Cedrus deodara, as no exception alternates between reproductive phase and vegetative phase and results in good seed year once in every three to four years interval. The uncertainty of reproduction is not predictable and can be attributed to change in the hormonal levels in the trees at the time of reproduction. Auxins and gibberellins play a major role in flowering of day light plants like conifers, hence an attempt to understand the role of growth hormones leading to the unpredictable behaviour of Cedrus deodara was made, for which over 900 trees were marked at three different sites, viz. Cheog forest, HFRI campus in Himanchal Pradesh and Chakrata forest in Uttarakhand and their reproductive behaviour was observed since the time of pollination to cone production. Samples from plants with different reproductive behaviour like, male, female, monoecious and vegetative were collected for extraction and estimation of growth hormones and find out the relationship between the levels of different hormones and cone production, if any.References
Chaney W.R. (1993). Cedrus libani, Cedar of leanon. Aror Age, 13(1): 26-27.
Chailakhyan M.K.H. (1968). Flowering hormones of plants in biochemistry and physiology of plant growth substances. Edited by E.F. Wightman and Setterfield, Ottawa, Runge Press, 1317-1340.
Chailakhyam M.K.H. (1961). Principles of ontogenesis and physiology of flowering in higher plants, Cand. J. Bot., 39: 1817-1841.
Dallimore W. and Jackson A.B (Revised by Harrison S.G.) (1996). A handbook of coniterae and Ginkgoaceae. Edward Arnold (publishers) Ltd., London.
Demetci E.Y. (1986). Toros sediri (Cedrus libani A. Richard) odununun bazi fiziksel ve mekanik ozellikleri uzerine arastirmalar. Ormancilik Arastirma Enstitusu Yayinlari, Teknik Bulten Serisi No. 180. 60 pp. (In Turkish; summary in English). [Studies on the some physical and mechanical properties of cedar (Cedrus libani A. Richard) wood.
Duff G.H. and Nolan N.J. (1958). Growth morphogenesis in the Canadian forest species.III. The time scale of morphogenesis at the tem apex of Pinus resinosa Ait. Can. J. Bot., 36:687-706.
Farjon A. (1990). Pinaceae: Drawings and Descriptions of the Genera Abies, Cedrus, Pseudolarix, Keteleeria, Nothotsuga, Tsuga, Cathaya, Pseudotsuga, Larix, and Picea. Koeltz Scientific Books, Konigstein, Federal Republic of Germany. 330 pp.
Horace. D. Graham and Linnie B. Thomas (1960). Rapid, Simple Colorimetric Method for the determination of micro quantities of gibberellic acid. The George Washington Carver Foundation, Tuskegee Institute, Alabama. National ScienceFoundation undergraduate research.
Jun-Min Guo, You-Ying Xn and Xue-Bo Yin (2010). Selective Differentiation of Indoleacetic Acid and Indolebutyric Acid Using Colorimetric Recognition after Ehrlich Reaction Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, China.
Maheshwari P. and Biswas C. (1970). Cedrus. Botanical Monograph No.5, CSIR. New Delhi.
Lang A. (1957). The effect of gibberellins upon flower formation. Proc. Natn. Acad. Sci, U.S.A. 45:704-717.
Pharis R.P., Ross S.D. and McMullan E.E. (1980). Promotion of flowering in the Pinaceae by gibberellins. III. Seedlings of Douglas-fir. Physiol Plant, 50: 119-126.
Paula M. Pijut (2000). Cedrus-The true Cedars. Journal of Arboriculture, 26(4): 218-224.
Schaffalitzky de Muckadell. M. (1959). Investigation on aging of apcal meristems in woody plants and its importance in
silviculture. Forst. Fors Vaes Danm. 25:3107-4565.4
Sheng C. and Wang S. (1990). Effect of applied growth regulators and cultural treatments on flowering and shoot growth of Pinus tabulaeformis. Can. J. For. Res., 20: 679-685.
Tewari D.N. (1994). A monograph on deodar: Cedrus deodara (Roxb.) G. Don. International Book Distributors, Dehra Dun, India, pp 3.
Werner J. Meudt and T. Powell Gaines (1967). Studies on the Oxidation of Indole-3-Acetic Acid by Peroxidase Enzymes. I. Colorimetric Determination of Indole-3-Acetic Acid Oxidation Products. Crops Research Division, Agricultural Research Service, United States Department of Agriculture, Plant Industry Station, Beltsville, Maryland 20705 and Georgia Coastal Plain Experiment Station, Tifton, Georgia.
Wheeler N.C., Wample R.L. and Pharis R.P. (1980). Promotion of flowering in the Pinaceae bygibberellins. IV. Seedlings and sexually mature grafts of lodgepole pine. Physiol Plant, 50: 340-346.
Xiangqing Pan, Ruth Welti and Xuemin Wang (2010). Quantitative analysis of major plant hormones in crude plant extracts by high-performance liquid chromatography-mass spectrometry Department of Biology, University of Missouri, St. Louis, MO, USA. Donald Danforth Plant Science Center, St. Louis, MO, USA. Kansas Lipidomics Research Center, Division of Biology, Kansas State University, Manhattan, KS, USA.
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