| Pak. J. Bot., 32(1): 111-114, 2000. | Back to Contents | ||||
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Updated: 08-04-11 | ||||
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REVERSAL OF ABA-INDUCED INHIBITION OF LETTUCE SEED GERMINATION BY HOMOEOPATHIC REMEDIES SHABNUM SHABBIR AND M. ISHAQ KHAN
Abstract: Exogenous and endogenous
abscisic acid (ABA) play a preventive role in the germination of seeds (Bewley
& Black, 1982; Berrie, 1984; Khan & Andveob, 1993). Exogenous application
of ABA inhibits the germination of both non-dormant seeds and seeds whose dormancy
has been broken by various treatments (Addicott & Lyon, 1969; Milborrow, 1974).
The ABA-induced inhibition of seed germination and seedling growth is known to
be counteracted by Gibberellic acid (GA3 ) and kinetin (Kabar, 1997;
Sankhla & Sankhla, 1968). In the present study lettuce (Lactuce sativa
cv. Grand Rapids) seeds after 2 days of germination at 20o C showed
54% inhibition by 6 µM and 84% by 8 µM ABA treatments (Table 1). Soaking
lettuce seeds in ABA prevents germination by blocking the action of plant hormones.
For counteracting this ABA induced inhibition of seed germination, some homoeopathic
remedies were tested. Department of Botany, University of Karachi, Karachi, Pakistan. |
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