Exogenous trehalose largely alleviates ionic unbalance, ROS burst and PCD ocurrence induced by high salinity in Arabidopsis seedlings

A - Papers appearing in refereed journals

Yang, L., Zhao, X., Zhu, H., Paul, M. J., Zu, Y. and Tang, Z. 2014. Exogenous trehalose largely alleviates ionic unbalance, ROS burst and PCD ocurrence induced by high salinity in Arabidopsis seedlings. Frontiers in Plant Science. 5, p. 570.

AuthorsYang, L., Zhao, X., Zhu, H., Paul, M. J., Zu, Y. and Tang, Z.
Abstract

Trehalose (Tre) has been reported to play a critical role in plant response to salinity and the involved mechanisms remain to be investigated in detail. Here, the putative roles of Tre in regulation of ionic balance, cellular redox state, cell death were studied in Arabidopsis under high salt condition. Our results found that the salt-induced restrictions on both vegetative and reproductive growth in salt-stressed plants were largely alleviated by exogenous supply with Tre. The microprobe analysis of ionic dynamics in the leaf and stem of florescence highlighted the Tre ability to retain K and K/Na ratio in plant tissues to improve salt tolerance. The flow cytometry assay of cellular levels of reactive oxygen species and programmed cell death displayed that Tre was able to antagonized salt-induced damages in redox state and cell death and sucrose did not play the same role with Tre. By comparing ionic distribution in leaf and inflorescence stem (IS), we found that Tre was able to restrict Na transportation to IS from leaves since that the ratio of Na accumulation in leaves relative to IS was largely improved due to Tre. The marked decrease of Na ion and improved sucrose level in IS might account for the promoted floral growth when Tre was included in the saline solution. At the same time, endogenous soluble sugars and antioxidant enzyme activities in the salt-stressed plants were also elevated by Tre to counteract high salt stress. We concluded that Tre could improve Arabidopsis salt resistance with respect to biomass accumulation and floral transition in the means of regulating plant redox state, cell death, and ionic distribution.

Keywordssalt stress; trehalose; Arabidopsis; ion homeostasis; redox state
Year of Publication2014
JournalFrontiers in Plant Science
Journal citation5, p. 570
Digital Object Identifier (DOI)doi:10.3389/fpls.2014.00570
Open accessPublished as ‘gold’ (paid) open access
FunderSyngenta UK
Biotechnology and Biological Sciences Research Council
Funder project or codeWheat
Trehalose pathway signaling as a generic mechanism to improve crop yield
[20:20 Wheat] Maximising yield potential of wheat
Molecular definition of Trehalose 6-phosphate mediated yield improvement
Publisher's version
Copyright license
CC BY
Output statusPublished
Publication dates
Online29 Oct 2014
Publication process dates
Accepted03 Oct 2014
PublisherFrontiers Media SA
ISSN1664-462X

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