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A GDSL-motif esterase/acyltransferase/lipase is responsible for leaf water retention in barley

文献类型： 外文期刊

作者： Li, Chao 1 ; Chen, Guoxiong 1 ; Mishina, Kohei 1 ; Yamaji, Naoki 8 ; Ma, Jian Feng 8 ; Yukuhiro, Fumiko 1 ; Tagiri, Ak 1 ;

作者机构： 1.Natl Inst Agrobiol Sci, Tsukuba, Ibaraki, Japan

2.Shanghai Chenshan Bot Garden, Shanghai Key Lab Plant Funct Genom & Resources, Shanghai, Peoples R China

3.Chinese Acad Sci, Shanghai Chenshan Plant Sci Res Ctr, Shanghai, Peoples R China

4.Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou, Gansu, Peoples R China

5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China

6.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou, Peoples R China

7.NARO, Inst Crop Sci, Tsukuba, Ibaraki, Japan

8.Inst Plant Sci & Resources, Kurashiki, Okayama, Japan

9.Shandong Acad Agr Sci, Crop Res Inst, Jinan, Peoples R China

10.Univ Sydney, Fac Agr & Environm, Plant Breeding Inst, Cobbitty, NSW, Australia

11.Nordic Genet Resource Ctr NordGen, Alnarp, Sweden

关键词： abiotic stress; cell walls; cuticle/waxes; drought/water stress

期刊名称：PLANT DIRECT （ 影响因子：3.038； 五年影响因子：3.017 ）

ISSN：

年卷期： 2017 年 1 卷 5 期

页码：

收录情况： SCI

摘要： The hydrophobic cuticle covers the surface of the most aerial organs of land plants. The barley mutant eceriferum-zv (cer-zv), which is hypersensitive to drought, is unable to accumulate a sufficient quantity of cutin in its leaf cuticle. The mutated locus has been mapped to a 0.02 cM segment in the pericentromeric region of chromosome 4H. As a map-based cloning approach to isolate the gene was therefore considered unlikely to be feasible, a comparison was instead made between the transcriptomes of the mutant and the wild type. In conjunction with extant genomic information, on the basis of predicted functionality, only two genes were considered likely to encode a product associated with cutin formation. When eight independent cer-zv mutant alleles were resequenced with respect to the two candidate genes, it was confirmed that the gene underlying the mutation in each allele encodes a Gly-Asp-Ser-Leu (GDSL)-motif esterase/acyltransferase/lipase. The gene was transcribed in the epidermis, and its product was exclusively deposited in cell wall at the boundary of the cuticle in the leaf elongation zone, coinciding with the major site of cutin deposition. CER-ZV is speculated to function in the deposition of cutin polymer. Its homologs were found in green algae, moss, and euphyllophytes, indicating that it is highly conserved in plant kingdom.

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