Salt tolerance traits in Deschampsia antarctica Desv.

Tapia-Valdebenito D.; Bravo Ramirez L.A.; Arce-Johnson P.; Gutiérrez-Moraga A.

dc.contributor.author	Tapia-Valdebenito D.
dc.contributor.author	Bravo Ramirez L.A.
dc.contributor.author	Arce-Johnson P.
dc.contributor.author	Gutiérrez-Moraga A.
dc.date.accessioned	2020-09-02T22:29:14Z
dc.date.available	2020-09-02T22:29:14Z
dc.date.issued	2016
dc.identifier	10.1017/S0954102016000249
dc.identifier.citation	28, 6, 462-472
dc.identifier.issn	09541020
dc.identifier.uri	https://hdl.handle.net/20.500.12728/6377
dc.description	Deschampsia antarctica Desv. (Poaceae) grows in coastal habitats in the Maritime Antarctic where it is often exposed to sea spray. Salt crystals have been observed on the surface of leaves in plants treated with high NaCl. We investigated if D. antarctica is a salt tolerant species that allows sodium ions to diffuse into the root where a salt overly sensitive (SOS) system extrudes Na+ from root cells and facilitates its movement through the xylem up to the leaves. Leaf epidermis, physiological parameters and sodium transporters in D. antarctica plants exposed to NaCl were studied over 21 days. Epidermal scanning electron microscopy showed trichome induction in the leaves of salt treated plants. In addition, salt treated plants showed increased sodium and proline levels with a concomitant increased expression of SOS genes (1 and 3). These results indicate that Na+ is taken up by the roots of D. antarctica and transported to the leaves. The sodium flux may be controlled by SOS1 activity. Up-regulation of the SOS1 gene may be involved in the increased sodium levels observed in the leaves of salt treated plants. Trichomes may also be involved in sodium exudation through the leaves under saline conditions. © Antarctic Science Ltd 2016.
dc.language.iso	en
dc.publisher	Cambridge University Press
dc.subject	Antarctic hair grass
dc.subject	leaf morphology
dc.subject	phenotypic plasticity
dc.subject	photosynthetic capacity
dc.subject	salt stress
dc.subject	ecomorphology
dc.subject	environmental stress
dc.subject	exudation
dc.subject	gene expression
dc.subject	grass
dc.subject	leaf morphology
dc.subject	phenotypic plasticity
dc.subject	photosynthesis
dc.subject	salinity tolerance
dc.subject	scanning electron microscopy
dc.subject	sodium
dc.subject	trichome
dc.subject	Deschampsia
dc.subject	Deschampsia antarctica
dc.subject	Poaceae
dc.title	Salt tolerance traits in Deschampsia antarctica Desv.
dc.type	Article

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Salt tolerance traits in Deschampsia antarctica Desv.

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