EARLY RESPONSE TO DEHYDRATION 7 Remodels Cell Membrane Lipid Composition during Cold Stress in Arabidopsis

被引:38
作者
Barajas-Lopez, Juan de Dios [1 ]
Tiwari, Arjun [1 ]
Zarza, Xavier [2 ]
Shaw, Molly W. [3 ]
Pascual, Jesus [1 ]
Punkkinen, Matleena [1 ]
Bakowska, Joanna C. [4 ]
Munnik, Teun [2 ]
Fujii, Hiroaki [1 ]
机构
[1] Univ Turku, Dept Biochem, Mol Plant Biol Unit, Turku 20014, Finland
[2] Univ Amsterdam, Swammerdam Inst Life Sci SILS, Sect Plant Cell Biol, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
[3] Cincinnati Childrens Hosp Med Ctr, Dept Hematol, Cincinnati, OH 45229 USA
[4] Loyola Univ Chicago, Stritch Sch Med, Dept Mol Pharmacol & Therapeut, Maywod, IL 60153 USA
基金
芬兰科学院;
关键词
Arabidopsis; Cold stress; ERD7; Membrane lipid composition; PHOSPHATIDIC-ACID BINDING; FREEZING TOLERANCE; PHOSPHOLIPASE-C; PLASMA-MEMBRANE; TRANSCRIPTOME CHANGES; PROTEIN; GENES; SALT; PHOSPHOINOSITIDE; ACCLIMATION;
D O I
10.1093/pcp/pcaa139
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Plants adjust to unfavorable conditions by altering physiological activities, such as gene expression. Although previous studies have identified multiple stress-induced genes, the function of many genes during the stress responses remains unclear. Expression of ERD7 (EARLY RESPONSE TO DEHYDRATION 7) is induced in response to dehydration. Here, we show that ERD7 plays essential roles in both plant stress responses and development. In Arabidopsis, ERD7 protein accumulated under various stress conditions, including exposure to low temperature. A triple mutant of Arabidopsis lacking ERD7 and two closely related homologs had an embryonic lethal phenotype, whereas a mutant lacking the two homologs and one ERD7 allele had relatively round leaves, indicating that the ERD7 gene family has essential roles in development. Moreover, the importance of the ERD7 family in stress responses was evidenced by the susceptibility of the mutant lines to cold stress. ERD7 protein was found to bind to several, but not all, negatively charged phospholipids and was associated with membranes. Lipid components and cold-induced reduction in PIP2 in the mutant line were altered relative to wild type. Furthermore, membranes from the mutant line had reduced fluidity. Taken together, ERD7 and its homologs are important for plant stress responses and development and associated with the modification in membrane lipid composition.
引用
收藏
页码:80 / 91
页数:12
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