Aqueous solutions of silver nitrate (10–100 μg/plant) and cobalt chloride (125–500 μg/plant), injected into the main stem of plants of the pistillate cv. 240 ofRicinus communis when the vegetative shoot apex was beginning to become reproductive, induced the formation of staminate (male) flowers with viable pollen in the normally strictly pistillate (female) terminal inflorescence, their number increasing with the dose of Ag+ and Co2+. No formation of bisexual flowers was noted. Female flowers pollinated with pollen from the induced male ones produced fruits and viable seeds.
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Ankineedu, G., Rao, N.G.P. (1973) Development of pistillate castor. Ind. J. Plant Breed.33, 416–422
Atsmon, D., Lang, A., Light, N. (1968) Contents and recovery of gibberellins in monoecious and gynoecious cucumber plants. Plant Physiol.43, 806–810
Augustine, J.J., Baker, L.R., Sell, H.M. (1973) Female flower induction on androecious cucumber,Cucumis sativus. J. Am. Soc. Hort. Sci.98, 197–199
Beyer, E., Jr. (1976) Silver ion: a potent antiethylene agent in cucumber and tomato. Hort. Sci.11, 195–196
Brewbaker, J.L., Kwack, B.H. (1963). The essential role of calcium ion in pollen germination and pollen tube growth. Am. J. Bot.50, 859–865
Byers, R.E., Baker, L.R., Sell, H.M., Herner, R.C., Dilley, D.R. (1972) Ethylene: a natural regulator of sex expression in cucumber. Proc. Natl. Acad. Sci. USA69, 717–720
Johansen, D.A. (1940) Plant microtechnique. McGraw Hill, New Delhi
Juneja (née Satsangi), A. (1971) Effect of gibberellic acid on the mophology, histology and flowering of castor bean (Ricinus communis). Phytomorphology21, 235–246
Lau, O.L., Yang, S.F. (1976) Inhibition of ethylene production by cobaltous ions. Plant Physiol.58, 114–117
Mohan Ram, H.Y., Jaiswal, V.S. (1974) The possible role of ethylene and gibberellins in flower sex differentiation ofCannabis sativa. In: Plant growth substances 1973 (Proc. VIII Int Cong. on Plant Growth Substances), pp. 987–996. Hirokawa, Tokyo
Mohan Ram, H.Y., Sett, R. (1979) Sex reversal in the female plants ofCannabis sativa by cobalt ions. Proc. Ind. Acad. Sci.88, 303–308
Rudich, J., Kedar, N., Halevy, A.H. (1970) Changed sex expression and possibilities for F1 hybrid seed production in some cucurbits bu application of Ethrel and Alar (B-995). Euphytica19, 47–53
Rudich, J., Halevy, A.H., Kedar, N. (1972) The level of phytohormones in monoecious and gynoecious cucumbers as affected by photoperiod and Ethephon. Plant Physiol.50, 585–590
Sarath, G., Mohan Ram, H.Y. (1979) Comparative effect of silver ion and gibberellic acid on the induction of male flowers on femaleCannabis plants. Experientia35, 333–334
Shifriss, O. (1961) Gibberellin as sex regulator inRicinus communis. Science133, 2061–2062
Spiegel, M.R. (1972) Theory and problems of statistics. McGraw Hill, New York
Splittstoesser, W.E. (1970) Effects of 2-chloroethyl phosphonic acid and gibberellic acid on sex expression and growth of pumpkins. Physiol. Plant.23, 762–768
Stanley, R.G., Linskens, H.F. (1974) Pollen: biology, biochemistry, management. Springer, Berlin Heidelberg New York
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Mohan Ram, H.Y., Sett, R. Induction of male flowers in a pistillate line ofRicinus communis L. by silver and cobalt ions. Planta 149, 413–415 (1980). https://doi.org/10.1007/BF00571179
- Flowers (sex expression)
- Sex expression