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dc.contributor.authorLi, Wenbo
dc.contributor.authorGuan, Qingmei
dc.contributor.authorWang, Zhenyu
dc.contributor.authorWang, Yingdian
dc.contributor.authorZhu, Jianhua
dc.date.accessioned2015-08-03T11:12:43Z
dc.date.available2015-08-03T11:12:43Z
dc.date.issued2013-07
dc.identifier.citationLi, W., Guan, Q., Wang, Z.-Y., Wang, Y., & Zhu, J. (2013). A Bi-Functional Xyloglucan Galactosyltransferase Is an Indispensable Salt Stress Tolerance Determinant in Arabidopsis. Molecular Plant, 6(4), 1344–1354. doi:10.1093/mp/sst062
dc.identifier.issn16742052
dc.identifier.pmid23571490
dc.identifier.doi10.1093/mp/sst062
dc.identifier.urihttp://hdl.handle.net/10754/562850
dc.description.abstractSalinity is an abiotic stress that substantially limits crop production worldwide. To identify salt stress tolerance determinants, we screened for Arabidopsis mutants that are hypersensitive to salt stress and designated these mutants as short root in salt medium (rsa). One of these mutants, rsa3-1, is hypersensitive to NaCl and LiCl but not to CsCl or to general osmotic stress. Reactive oxygen species (ROS) over-accumulate in rsa3-1 plants under salt stress. Gene expression profiling with Affymetrix microarray analysis revealed that RSA3 controls expression of many genes including genes encoding proteins for ROS detoxification under salt stress. Map-based cloning showed that RSA3 encodes a xyloglucan galactosyltransferase, which is allelic to a gene previously named MUR3/KAM1. The RSA3/ MUR3/KAM1-encoded xylogluscan galactosyltransferase regulates actin microfilament organization (and thereby contributes to endomembrane distribution) and is also involved in cell wall biosynthesis. In rsa3-1, actin cannot assemble and form bundles as it does in the wild-type but instead aggregates in the cytoplasm. Furthermore, addition of phalloidin, which prevents actin depolymerization, can rescue salt hypersensitivity of rsa3-1. Together, these results suggest that RSA3/MUR3/KAM1 along with other cell wall-associated proteins plays a critical role in salt stress tolerance by maintaining the proper organization of actin microfilaments in order to minimize damage caused by excessive ROS. © 2013 The Author.
dc.description.sponsorshipThis work was supported by National Science Foundation (NSF) grants IOS0919745 and MCB0950242 to J.Z. and by NSF grant DBI0922650.
dc.publisherElsevier BV
dc.subjectactin microfilaments
dc.subjectendomembranes
dc.subjectRSA3
dc.subjectSalt stress tolerance
dc.subjectxyloglucan galactosyltransferase
dc.titleA bi-functional xyloglucan galactosyltransferase is an indispensable salt stress tolerance determinant in arabidop
dc.typeArticle
dc.contributor.departmentBiological and Environmental Science and Engineering (BESE) Division
dc.contributor.departmentCenter for Desert Agriculture
dc.identifier.journalMolecular Plant
dc.contributor.institutionCollege of Life Sciences, Beijing Normal University, Beijing, 100875, China
dc.contributor.institutionDepartment of Plant Science and Landscape Architecture, University of Maryland, College Park, MD 20742, United States
kaust.personWang, Zhenyu


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