Journal of Food, Agriculture and Environment
Vol 7,
Issue 2,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Pinto bean seed reserve utilization and seedling growth as affected by seed size, salinity and drought stress
Author(s):
Ahmad Gholami 1*,
Saeed Sharafi 2, Soraya Ghasemi 3, Amir Sharafi 4Recieved Date: 2009-01-16, Accepted Date: 2009-04-02
Abstract:The rapid and uniform establishment of pinto bean (Phaseolus vulgaris L.) stands in stress condition is conductive to higher yields. The objective of this study was the identification of the sensitive seedling growth components in response to drought and salinity stress. Two experiments were conducted using various osmotic pressures (OP) induced by PEG (0, -0.2, -0.4, -0.6 and -0.8 MPa) in the first experiment and by NaCl (the same OPs) in the second experiment. In each experiment two cultivars and three seed sizes were used. Seedling growth rate (SLG), weight of mobilized seed reserve (WMSR), seed reserve depletion (SRDP) and seed reserve utilization efficiency (SRUE) were significantly affected by drought and salinity. Decreasing osmotic potential (OP) progressively decreased SLG, SRDP and SRUE. WMSR, SRDP, SRUE in the first experiment and SLG in the second experiment were affected by seed size. Seedlings from large seeds had greater SLG than those from small seeds.
Keywords:Salinity,
drought, seed size, germination, seed reserve mobilization, pinto bean, Phaseolus vulgarisJournal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 411-414
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