Apoplastic Na+inVicia fabaLeaves Rises After Short-Term Salt Stress and Is Remedied by Silicon

Shahzad, M., Zörb, C., Geilfus, C.-M. and Mühling, K. H. (2012) Apoplastic Na+inVicia fabaLeaves Rises After Short-Term Salt Stress and Is Remedied by Silicon Journal of Agronomy and Crop Science, 199 (3). pp. 161-170. DOI 10.1111/jac.12003.

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Abstract

Salinity primarily affects plants by inhibiting shoot growth. Salt-sensitive plants have been suggested to accumulate Na+ within their leaf apoplast under salinity, leading to a reduced water status. Evidence related to apoplastic Na+ accumulation is still enigmatic. We have focused on the effect of a short-term salt treatment by using the salt-sensitive Vicia faba. Moreover, we have examined the role of silicon in alleviating sodium accumulation in the apoplast. Salt-sensitive field beans have been subjected to increasing levels of salinity, with and without the addition of silicon under hydroponic conditions. We have demonstrated that the dicot Vicia faba exhibits a rise in Na+ concentration in the leaf apoplast at higher salinity levels; this is significantly ameliorated by the addition of silicon. Further, enhanced shoot growth under high salt treatment in the presence of added silicon is correlated with a significant decrease in Na+ concentration in the leaves. The novelty of the current study is the detection of a high Na+ concentration in the leaf apoplast of the salt-sensitive dicot field bean. Our results support Oertli's hypothesis that extracellular salt accumulation can lead to wilting leaves, plant growth reduction and cell death.

Document Type: Article
Refereed: Yes
DOI etc.: 10.1111/jac.12003
ISSN: 09312250
Date Deposited: 27 Jun 2017 08:50
Last Modified: 27 Jun 2017 08:50
URI: http://eprints.uni-kiel.de/id/eprint/38581

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