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Inhibition of Germination in Kochia indica

E. EL. SHISHINY and D. THODAY
Journal of Experimental Botany
Vol. 4, No. 10 (Feb. 1953), pp. 10-22
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/23686157
Page Count: 13
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Inhibition of Germination in Kochia indica
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Abstract

Seeds of Kochia indica Wight germinate rapidly in shallow water, but their germination is retarded on moist filter-paper. The retardation is traced to a surface-active, saponin-like inhibitor, which is readily leached away in water and is adsorbed by charcoal or soil. Excised embryos may also remain dormant on filter-paper, but if rinsed in water quickly become active. Inhibition is favoured by higher temperature (30° C. as against 20° or less), especially in an atmosphere of oxygen, although once active the embryos grow rapidly in such conditions. When the oxygen concentration is reduced to 5 per cent., germination and growth are markedly retarded, but 5 per cent. CO2 has little or no retarding effect.

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