Abstract
Barley plants (Hordeum vulgare L.) received foliar applications of 10−4 M gibberellic acid (GA3) and Kinetin (KN) individually and in combination at one or more of three growth stages: flag leaf appearance (I), ear emergence (II), and the first stage of senescence initiation in the flag leaf (III). Both plant growth regulators (PGR) hastened onset of senescence when sprayed at Stage I and/or Stage II. Treatment at Stage III, either alone or in combination with treatments at the other stages, tended to postpone senescence. Yield components also showed stage-dependent response: Stage I treatment increased the formation of total and bearing tillers, and Stage III treatment improved grain number and weight. However, while GA3 proved more effective than KN, the two together acted antagonistically.
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References
Corcooran MR, Phinney BD (1962) Changes in amounts of gibberellin like substances in developing seeds ofEchinocystis, Lupinus andPhaseolus. Physiol Plant 15:252–262
Dhiman SD, Sharma HC, Singh RP (1980) Association between flag leaf area and grain yield in wheat. Plant Physiol 23:282–287
Duncan WG, Loomis RS, Williams WA, Hanau R (1967) A model for simulating photosynthesis in plant communities. Hilgardia 38:181–205
Evans LT (1975) Crop physiology: some case histories, chapters 1, 5. 11. Cambridge University Press, London
Gifford RM, Evans LT (1981) Photosynthesis, carbon partioning and yield. Ann Rev Plant Physiol 32:485–509
Herzog H (1975) Untersuchungen zur Wachstum und Entwicklungs Physiologischen Bedeutung der Cytokinine bei Sommerweizen, Dies Kiel
Ho LC (1978) Translocation of assimilates in the tomato fruit. Proc Joint BCPC and BPGRG Symp: Opportunities for Chemical Plant Growth Regulation, pp 159–166
Kumar D, Wareing PF (1972) Factors controlling stolon development in the potato plant. New Phytol 71:639–648
Langer RHM, Prasad PC, Laude HM (1973) Effects of Kinetin on tiller bud elongation in wheat (Tritium aestivum L.). Ann. Bot 37:565–571
Lendent JF, Renard CH (1982) Factors determining flag leaf curvature in wheat. Crop Sci 22:617–622
Mishra SD, Gaur BK (1980) Growth regulator control of senescence in discs of betel (Piper betle L.) leaf: effect of rate and degree of senescence. Ind J Exptl Biol 18:297–298
Mishra SD, Desai BM, Gaur BK (1981) Effect of gibberellic acid spraying on banana fruit development. Curr Science 50:275–277
Mishra SD, Joshi RK, Gaur BK (1982) Stage-dependent plant response to growth regulators. DAE Seminar: Plant physiol: an underutilized potential for improving crop productivity. University Agricultural Science, Bangalore, India, March 17–19, 1981, pp 257–286
Mishra SD, Joshi RK, Gaur BK (1983) Preferential effect of GA, BA and etherel at pegging stage in groudnut (Arachis hypogaeae L.) Acta Bot Indica (in press)
Mohiuddin SH, Croy LI (1980) Flag leaf and peduncle area duration in relation to winter wheat grain yield. Agron J 72:299–301
Patterson TG, Moss DN (1979) Senescense in field grown wheat. Crop Science 19:635–640
Patterson TG, Moss DN, Brun WA (1980) Enzymatic changes during senescence of field grown wheat. Crop Science 20:15–18
Ruckenbauer P, Kirby BJM (1973) Effect of Kinetin on the growth and development of barley and its interaction with root size. J Agr Sci Camb 80:211–217
Sabater B, Rodriguez MT, Zamorano A (1981) Effects and interactions of gibberellic acid and cytokinins on the retention of chlorophyll and phosphate in barley leaf segments. Physiol Plant 51:361–364
Secor J, Shibles R, Stewart CR (1983) Metabolic changes in senescing soybean leaves of similar plant ontogeny. Crop Sci 23:106–110
Tang YW, Cheng CW, Hou TW, Chang YM, Tasi K (1974) Hormonal control of boll shedding in cotton plant. In: Proceedings of the 8th International Conference on Plant Growth Substances, Aug. 26–Sept. 1, 1973, Tokyo, pp 1042–1051.
Thorne GN (1961) Effects of age and environment on net assimilation rate of barley. Ann Bot 25:29–38
Thorne GN (1966) Physiological aspects of grain yield in cereals. In: Milthorpe FL, Ivins HD (eds) The growth of cereals and grasses. Butterworths, London, pp 85–105
Tollenaar M, Daynard TB (1978) Leaf senescence in short season maize hybrids. Can J Plant Sci 58:869–874
Welbank PJ, French SAW, Witts KJ (1966) Dependence of yields of wheat varieties on their leaf area duration. Ann Bot 30:291–299
Wheeler AW (1972) Changes in growth substance during growth of wheat grains. Ann Appl Biol 72:327–334
Williams RH, Cartwright PM (1980) The effect of application of a synthetic cytokinin on root dominance and grain yield in spring barley. Ann Bot 46:445–452
Wittenbach VA (1979) Ribulose bisphosphate carboxylase and proteolytic activity in wheat leaves from anthesis through senescence. Plant Physiol 64:884–887
Woolhouse HW (1982) Leaf senescence. In: Smith H, Grierson D (eds) The molecular biology of plant development. Blackwells, Oxford, pp 256–281
Yoshida S (1972) Physiological aspects of grain yield. Ann Rev Plant Physiol 23:437–464
Ziv M, Koller D, Halevy AH (1976) Ethylene and the geotropic response of lateral branches in peanuts (Arachis hypogaea L.). Plant Cell Physiol 17:333–339
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Mishra, S.D., Gaur, B.K. Modification of flag leaf senescence and yield characters in barley (Hordeum vulgare L.) by gibberellic acid and kinetin. J Plant Growth Regul 4, 63–70 (1985). https://doi.org/10.1007/BF02266944
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DOI: https://doi.org/10.1007/BF02266944