Morphological and biochemical response to osmotic stress in alfalfa (Medicago sativa L.)
2008
Safarnejad, A. (Khorasan Agriculture and Natural Resources Research Center, Mashhad (Iran))
Water stress is a serious environmental problem throughout the world, which may be partially relieved by breeding cultivars that can tolerate low soil water potentials. Alfalfa (Medicago sativa L.) is normally grown in arid and semi-arid areas, so the investigation of alfalfa potential for drought tolerance and the proper selection of its drought tolerant accessions are very important in this context. Eight alfalfa accessions widely grown in Iran viz., Baghdadi, Nikshahri, Ghareh, Yazdi, Siriver, Sequel, Ranger and Kodi were assessed for drought tolerance at the germination and seedling stages. Osmotic stress was applied at different concentrations [zero (control), -0.4, -0.8 and -1.2 MPa] of PEG (polyethylene glycol) 6000. The data showed that the intensity of reduction in various growth attributes in different accessions was not the same in response to osmotic stress.
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