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Salt tolerance in wild Hordeum species is associated with restricted entry of Na+ and Cl- into the shoots.
J Exp Bot. 2005 Sep; 56(419):2365-78.JE

Abstract

Eight wild Hordeum species: H. bogdanii, H. intercedens, H. jubatum, H. lechleri, H. marinum, H. murinum, H. patagonicum, and H. secalinum, and cultivated barley (H. vulgare) were grown in nutrient solution containing 0.2 (control), 150, 300, or 450 mol m(-3) NaCl. In saline conditions, the wild Hordeum species (except H. murinum) had better Na+ and Cl- 'exclusion', and maintained higher leaf K+, compared with H. vulgare. For example, at 150 mol m(-3) NaCl, the K+:Na+ in the youngest, fully expanded leaf blades of the wild Hordeum species was, on average, 5.2 compared with 0.8 in H. vulgare. In H. marinum grown in 300 mol m(-3) NaCl, K+ contributed 35% to leaf psi(pi), whereas Na+ and Cl- accounted for only 6% and 10%, respectively. By comparison, in H. vulgare grown at 300 mol m(-3) NaCl, K+ accounted for 19% and Na+ and Cl- made up 21% and 25% of leaf psi(pi), respectively. At 300 mol m(-3) NaCl, glycinebetaine and proline together contributed almost 15% to psi(pi) in the expanding leaf blades of H. marinum, compared with 8% in H. vulgare. Decreased tissue water content under saline conditions made a substantial contribution to declines in leaf psi(pi) in the wild Hordeum species, but not in H. vulgare. A number of the wild Hordeum species were markedly more salt tolerant than H. vulgare. H. marinum and H. intercedens, as examples, had relative growth rates 30% higher than H. vulgare in 450 mol m(-3) NaCl. Hordeum vulgare also suffered up to 6-fold more dead leaf material (as a proportion of shoot dry mass) than the wild Hordeum species. Thus, several salt-tolerant wild Hordeum species were identified, and these showed an exceptional capacity to 'exclude' Na+ and Cl- from their shoots.

Authors+Show Affiliations

Garthwaite AJ
School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia.
von Bothmer R
No affiliation info available
Colmer TD
No affiliation info available

MeSH

ChloridesHordeumKineticsPlant LeavesPlant ShootsSodiumSodium ChlorideSpecies Specificity

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16014366

Citation

Garthwaite, Alaina J., et al. "Salt Tolerance in Wild Hordeum Species Is Associated With Restricted Entry of Na+ and Cl- Into the Shoots." Journal of Experimental Botany, vol. 56, no. 419, 2005, pp. 2365-78.
Garthwaite AJ, von Bothmer R, Colmer TD. Salt tolerance in wild Hordeum species is associated with restricted entry of Na+ and Cl- into the shoots. J Exp Bot. 2005;56(419):2365-78.
Garthwaite, A. J., von Bothmer, R., & Colmer, T. D. (2005). Salt tolerance in wild Hordeum species is associated with restricted entry of Na+ and Cl- into the shoots. Journal of Experimental Botany, 56(419), 2365-78.
Garthwaite AJ, von Bothmer R, Colmer TD. Salt Tolerance in Wild Hordeum Species Is Associated With Restricted Entry of Na+ and Cl- Into the Shoots. J Exp Bot. 2005;56(419):2365-78. PubMed PMID: 16014366.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Salt tolerance in wild Hordeum species is associated with restricted entry of Na+ and Cl- into the shoots. AU - Garthwaite,Alaina J, AU - von Bothmer,Roland, AU - Colmer,Timothy D, Y1 - 2005/07/12/ PY - 2005/7/15/pubmed PY - 2005/12/13/medline PY - 2005/7/15/entrez SP - 2365 EP - 78 JF - Journal of experimental botany JO - J Exp Bot VL - 56 IS - 419 N2 - Eight wild Hordeum species: H. bogdanii, H. intercedens, H. jubatum, H. lechleri, H. marinum, H. murinum, H. patagonicum, and H. secalinum, and cultivated barley (H. vulgare) were grown in nutrient solution containing 0.2 (control), 150, 300, or 450 mol m(-3) NaCl. In saline conditions, the wild Hordeum species (except H. murinum) had better Na+ and Cl- 'exclusion', and maintained higher leaf K+, compared with H. vulgare. For example, at 150 mol m(-3) NaCl, the K+:Na+ in the youngest, fully expanded leaf blades of the wild Hordeum species was, on average, 5.2 compared with 0.8 in H. vulgare. In H. marinum grown in 300 mol m(-3) NaCl, K+ contributed 35% to leaf psi(pi), whereas Na+ and Cl- accounted for only 6% and 10%, respectively. By comparison, in H. vulgare grown at 300 mol m(-3) NaCl, K+ accounted for 19% and Na+ and Cl- made up 21% and 25% of leaf psi(pi), respectively. At 300 mol m(-3) NaCl, glycinebetaine and proline together contributed almost 15% to psi(pi) in the expanding leaf blades of H. marinum, compared with 8% in H. vulgare. Decreased tissue water content under saline conditions made a substantial contribution to declines in leaf psi(pi) in the wild Hordeum species, but not in H. vulgare. A number of the wild Hordeum species were markedly more salt tolerant than H. vulgare. H. marinum and H. intercedens, as examples, had relative growth rates 30% higher than H. vulgare in 450 mol m(-3) NaCl. Hordeum vulgare also suffered up to 6-fold more dead leaf material (as a proportion of shoot dry mass) than the wild Hordeum species. Thus, several salt-tolerant wild Hordeum species were identified, and these showed an exceptional capacity to 'exclude' Na+ and Cl- from their shoots. SN - 0022-0957 UR - https://www.unboundmedicine.com/medline/citation/16014366/Salt_tolerance_in_wild_Hordeum_species_is_associated_with_restricted_entry_of_Na+_and_Cl__into_the_shoots_ DB - PRIME DP - Unbound Medicine ER -