Modulation of growth parameters, proline content and mineral nutrients in maize (<em>Zea mays</em> L.) by exogenously applied glycinebetaine at different growth stages under salt stress
AbstractEffect of glycinebetaine (0, 50 and 100 mM) applied as a foliar spray at different growth stages i.e. vegetative, reproductive and both at the vegetative and reproductive stages on growth, proline accumulation and ion accumulation was investigated in plants of two maize cultivars under saline conditions. Salt stress caused a significant reduction in growth, leaves and roots K+ and Ca2+ while, Na+ and Cl- concentrations of both maize cultivars was significantly increased due to salt stress. Foliar applied glycinebetaine at the vegetative stage was more effective in ameliorating the adverse effects of salt stress than when applied at the reproductive or at both vegetative and reproductive stages. Foliar applied glycinebetaine did not change the leaf proline concentration in the salt stressed plants of both cultivars. However, exogenously applied glycinebetaine significantly reduced Na+ accumulation in the roots and leaves, while that of K+ increased, thereby resulting in higher K+/Na+ and Ca2+/Na+ ratios under saline conditions.
From Volume 92 (2019) on, the content of the journal is licensed under the Creative Commons Attribution 4.0 License. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and any changes are labelled.
The copyright of the published work remains with the authors. If you want to use published content beyond what the CC-BY license permits, please contact the corresponding author, whose contact information can be found on the last page of the respective article. In case you want to reproduce content from older issues (before CC BY applied), please contact the corresponding author to ask for permission.