Difference in yield and physiological features in response to drought and salinity combined stress during anthesis in Tibetan wild and cultivated barleys.

ABSTRACT: Soil salinity and drought are the two most common and frequently co-occurring abiotic stresses constraining crop growth and productivity. Greenhouse pot experiments were conducted to investigate the tolerance potential and mechanisms of Tibetan wild barley genotypes (XZ5, drought-tolerant; XZ16, salinity/aluminum tolerant) during anthesis compared with salinity-tolerant cv CM72 in response to separate and combined stresses (D+S) of drought (4% soil moisture, D) and salinity (S). Under salinity stress alone, plants had higher Na(+) concentrations in leaves than in roots and stems. Importantly, XZ5 and XZ16 had substantially increased leaf K(+) concentrations; XZ16 was more efficient in restricting Na(+) loading in leaf and maintained a lower leaf Na(+)/K(+) ratio. Moreover, a significant dec

SUBMITTER: Ahmed IM 

PROVIDER: S-EPMC3812012 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature