Drought tolerance in lentil: II. Differential genotypic response to drought
1990
Bukhtiar, B.A. (Ayub Agricultural Research Inst., Faisalabad (Pakistan). Jute Section) | Abu-Shakra, S. (Agriculture Univ., Beruit (Lebanon)) | Kausar, A.G. (Ayub Agricultural Research Inst., Faisalabad (Pakistan). Research Information Unit)
Two lentil (Lens culinaris Medic) cultivars, Local small (LS) and Local large seeded (LL) were subjected to five stress treatments, normally irrigated (control), -4, -8,-12 and -16 bar osmotic potential (O.P.) stress simulated by mannitol under controlled criteria for evaluating genetic variability and varieties for drought tolerance. Rate of water uptake and Vigour Index (VI) decreased and the time to germinate increased with a corresponding increase in moisture stress. Total germination and rate of root growth were not affected upto-4 atm.O.P. Germination of both cultivars was severely reduced at -16 atm O.P. However, LS cultivar gave significantly better germination and root growth than LL cultivar under all levels of O.Ps. Seeds of both cultivars germinated when their moisture content was between 75-90 percent on fresh weight basis. The O.P. of -12 atm was found most appropriate to simulate drought for testing lentil cultivars and screening suitable genotype tolerant to drought stress.
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