Abstract
A field experiment was conducted to investigate the effects of presoaking the wheat grains (Triticum aestivum L.) in different levels of salinity (33 or 66 mM) and in growth regulators (indolyl-3-acetic acid, IAA at SO g m-3, gibberellic acid, GA3 at 100 g m-3, or kinetin at 100 g m-3) on the shoot growth and pigment content of the developing wheat flag leaf. Salinity at 33 or 66 mM led to an insignificant increase in the fresh and dry masses as well as in the shoot diameter and shoot length, but it attenuated the flag leaf area. In the majority of cases, salinity increased the chlorophyll (Chla, Chlb) and carotenoid contents as well as the number of chloroplasts per a mesophyll cell. The growth in the wheat shoot of the saline-treated plants was, in general, stimulated in response to presoaking the grains in kinetin or GA3. On the other hand, IAA + salinity led to a negligible effect on the growth in the wheat plants particularly at the early stages of growth. The presoaking of grains in NaCl at 33 mM + IAA or 66 mM + kinetin induced a marked increase in the pigment content of the wheat flag leaf particularly at the early stages of growth. The interaction between salinity and phytohormones increased the number of chloroplasts; kinetin was the most effective.
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Abdel-Aziz, I.M., Mahmoud, M.H., Ashoub, M.A.: Interactive effects of indole acetic acid (IAA) and salinity on the germination and growth of soybean seedlings. - Ann. Agr. Sci. Fac. Agr. Ain Shams Univ. (Cairo)30: 1093–1108, 1985.
Abo-Hamed, S.A., Mansour, F.A., Aldesuquy, H.S.: Shoot growth and morphological characteristics of wheat as affected by sodium salicylate, alar, asulam and kinetin. - Mans. Sci. Bull.14: 203–221, 1987.
Ball, H.C., Farquhar, C.O.: Photosynthetic and stomatal response of two mangrove sp.Aegiceras corniculatum andAvicennia. - Plant Physiol.41: 1222, 1984.
Banyal, S., Rai, V.K.: Reversal of osmotic stress effects by gibberellic acid inBrassica campestris. Recovery of hypocotyl growth, protein and RNA levels in the presence of GA. - Physiol. Plant.59: 111–114, 1983.
Chavan, P., Karadge, B.A.: Influence of salinity on mineral nutrition of pea nut(Arachis hypogea). - Plant Soil54: 5–12, 1980.
Darra, B.L., Saxena, S.N.: Role of IAA on the mineral composition of maize crop under various osmotic stressed conditions.- Plant Soil38: 657–662, 1973.
Darra, B.L., Seth, S.P., Singh, H., Hendiratta, R.S.: Effect of hormone directed presoaking on emergence and growth of osmotically stressed wheat. - Agron. J.65: 292–295, 1973.
El-Deep, B.A.: The Effect of Plant Hormones and Salinity of some Physiological Activities of some Plants. - M. Sc. Thesis. Assiut University, Assiut, Egypt 1984.
Feierabend, J., Boer, J.D.E.: Comparative analysis of the action of cytokinin and light on the formation of ribulose-bisphosphate carboxylase and plastid biogenesis. - Planta142: 75–82, 1978.
Heikal, M.M.D.: Physiological studies on salinity. Effect of salinity on photosynthetic pigments and nitrogen content and growth of wheat and radish plants. - Bull. Fac. Sci. Assiut Univ.4: 1–7, 1976.
Heikal, M.M., Ahmed, A.M., Shaddad, M.A.: Changes in dry weight and mineral composition of some oil producing plants over a range of salinity stresses. - Biol. Plant.22: 25–33, 1980.
Heikal, M.M., Shaddad, M.A., Ahmed, A.M.: Effect of water stress and gibberellic acid and germination of flax, sesame and onion seeds. - Biol. Plant.24: 124–129, 1982.
Mansour, F.A., Abo-Hamed, S.A., Aldesuquy, H.S.: Comparative effects of sodium salicylate, alar, asulam and kinetin on pigment contents of developing wheat leaves. - Mans. Sci. Bull.14: 207–223, 1986.
Mansour, F.A., Abo-Hamed, S.A., Aldesuquy, H.S.: Regulation of carbohydrate metabolism in wheat plant by sodium salicylate, alar, asulam and kinetin. - Mans. Sci. Bull.15: 335–362, 1988.
Metzner, H., Rau, H., Senger, H.: Untersuchungen zur Synchronisierbarkeit einzelner Pigment-Mangel Mutanten vonChlorella. - Planta65: 186–194, 1965.
Mizrahi, Y.: Effect of NaCl on fruit ripenning of the non ripenning tomato mutants nor and rin. - Plant Physiol.69: 966, 1982.
Munns, R., Termaat, A.: Whole-plant responses to salinity. - Aust. J. Plant Physiol.13: 143–160, 1986.
Neales, T.F., Sharkey, P.T.: Effect of salinity on growth and on mineral and organic constituents of the halophyteDisphyma australe. - Aust. J. Plant Physiol.8: 165–169, 1981.
Palit, P., Kundu, A., Mondai, R.K., Sircar, S.M.: Photosynthetic efficiency and productivity in tropical rice. - Plant Biochem. J.3: 54–62, 1976.
Quarrie, S.A., Jones, H.G.: Genotypic variation in leaf water potential, stomatal conductance and abscisic acid concentration in spring wheat subjected to artificial drought stress. - Ann. Bot.44: 323–327, 1979.
Rao, C.N., Murty, K.S.: Source and sink relationship in rice. - Sci. Cult.42: 555–559, 1976.
Salama, F.M., Khodary, S.A., Heikal, M.M.: Effect of saline irrigation and GA3, on osmotic pressure, photosynthetic pigments and carbohydrate content of carrot and sugar beet plants. - Egypt. J. Bot.23: 113–121, 1980.
Sass, J.E.: Botanical Microtechnique. - The Iowa State College Press, Ames 1951.
Shaddad, M.A., Heikal, M.M.: Interactive effect of GA3 and salinity on kidney bean. - Bull. Fac. Sci. Assiut Univ.11: 65–81, 1982.
Shah, C.B., Lommis, R.S.: Ribonucleic acid and protein metabolism in sugar beet during drought. - Physiol. Plant.18: 240–254, 1965.
Singleton, P.W., Bohlool, B.B.: Effect of salinity on nodule formation by soybean. - Plant Physiol.74: 72–78, 1984.
Snedecor, G.W., Cochran, W.G.: Statistical Methods 6th Ed. - Oxford IBH Publishing Co., New Delhi 1976.
Steward, F.C.: Analysis of growth regulating substances. - Academic Press, New York 1959.
Tagawa, T., Bonner, J.: Mechanical properties of theAvena coleoptile as related to auxin and to ionic interaction. -Plant Physiol.32: 207–212, 1957.
Thorne, G.N.: Physiological aspects of grain yield in cereals. - In: Milthorpe, F.I., Ivins, J.D. (ed.): The Growth of Cereals and Grasses. Butterworth, London 1966.
Varshney, K.A., Baijal, B.D.: Influence of hormonal treatments on chlorophyll retention in leaf discs from some salt stressed grasses. - Comp. Physiol. Ecol.4: 104–110, 1979.
Vidhu, Murty, Y.S.: After effect of seed treatment with indole-3-acetic acid and gibberellic acid on the length of hypocotyl ofTagetes erecta L.- Acta bot. indica13: 104–106, 1985.
Wilkins, M.B.: The Physiology of Plant Growth and Development. - Tata McGraw-Hill, Co. Ltd. 1978.
Wu, C.W., Lin, J.Y., Tarng, S.F., Chern, J.L.: Effects of plant growth regulators on the growth and development of tomato. II. Effects of plant growth regulators on vegetative growth of tomato. - J. agr. Assoc. China124: 31–42, 1983.
Younis, M.E., El-Shahaby, O.A., Abo-Hamed, S., Haroun, S.A.: Plant growth, metabolism and adaptation in relation to stress conditions. X. Hormonal control and pigment content of salinizedPisum aestivum plants. Proc. Inter. Conf. : Plant Growth, Drought and Salinity in the Arab Region (Giza, Cairo, December 3–7, 1988.), 245–255, 1991
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Aldesuquy, H.S. Growth and pigment content of wheat as influenced by the combined effects of salinity and growth regulators. Biol Plant 34, 275–283 (1992). https://doi.org/10.1007/BF02925883
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DOI: https://doi.org/10.1007/BF02925883