Potassium and sodium relations in salinised barley tissues as a basis of differential salt tolerance | doi.page

0 citations0 references

Potassium and sodium relations in salinised barley tissues as a basis of differential salt tolerance

Functional Plant Biology2007Vol. 34(2), pp. 150–162

Citations Over TimeTop 1% of 2007 papers

Zhong‐Hua Chen, Meixue Zhou, Ian Newman, N. J. Mendham, Guoping Zhang, Sergey Shabala

Abstract

A large-scale glasshouse trial, including nearly 70 barley cultivars (5300 plants in total), was conducted over 2 consecutive years to investigate plant physiological responses to salinity. In a parallel set of experiments, plant salt tolerance was assessed by non-invasive microelectrode measurements of net K+ flux from roots of 3-day-old seedlings of each cultivar after 1 h treatment in 80 mm NaCl as described in our previous publication (Chen et al. 2005). K+ flux from the root in response to NaCl treatment was highly (P 2 assimilation, survival rate and thousand-seed weight measured in glasshouse experiments after 4-5 months of salinity treatment. No significant correlation with relative germination rate or tillering was found. In general, 62 out of 69 cultivars followed an inverse relationship between K+ efflux and salt tolerance. In a few cultivars, however, high salt tolerance (measured as grain yield at harvest) was observed for plants showing only modest ability to retain K+ in the root cells. Tissue elemental analysis showed that these plants had a much better ability to prevent Na+ accumulation in plant leaves and, thus, to maintain a higher K+/Na+ ratio. Taken together, our results show that a plant's ability to maintain high K+/Na+ ratio (either retention of K+ or preventing Na+ from accumulating in leaves) is a key feature for salt tolerance in barley.

Citations Over TimeTop 1% of 2007 papers

Abstract

Related Papers