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Publication Type J
Authors Lombardi, T., T. Fochetti and A. Onnis
Title Comparative salt tolerance of two wild Hordeum species (H- maritimum With. and H-murinum L.) from the coast of Tuscany (Italy)
Source Plant Biosystems
Author Keywords ecology; germination; galophytes; Hordeum maritimum With.; Hordeum murinum L.; salt tolerance Oryza-sativa l; salinity tolerance; seed-germination; growth; accumulation; allocation; plants; nacl
Abstract The differences in salt tolerance between Hordeum maritimum and H. murinum were studied. Seeds were collected at horn maturity from wild populations growing respectively near the Orbetello Lagoon and S. Piero a Grade (Tuscany, Italy) and were used in germination and growth tests at increasing salinity (NaCl) levels. H. maritimum was confirmed to be a true halophyte as compared to H. Murinum, which exhibited germination behavior typical of many wird glycophytes. The higher salt sensitivity of H. murinum compared to H. maritimum was also shown by its shoot length values, which decreased only in H. murinum, albeit in 100 mM NaCl treatment. The higher degree of salt tolerance of H. maritimum is further demonstrated by the Na : K ratio. H. maritimum can accumulate a greater amount of sodium than potassium in both roots and shoots, even in the absence of salt treatment. However, in NaCl solutions H. maritimum showed a higher Na : K ratio for shoots - an index of better uptake and translocation of sodium to leaves - as has been for many halophyte includers. These results thus help to enhance knowledge on wild relatives of barley, whose potential contribution to genetic improvement in salinity tolerance has previously not been thoroughly explored.
29-Character Source Abbreviation Plant Biosyst.
Year Published 2000
Volume 134
Issue 3
Beginning Page 333-339
Unique Article Identifier ISI:000167096200006
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