数字农科院2.0

Genome-scale mining of root-preferential genes from maize and characterization of their promoter activity

文献类型： 外文期刊

作者： Ye Li; Xiaoqing Liu; Rumei Chen; Jian Tian; Yunliu Fan* and Xiaojin Zhou*

作者机构：

关键词： Maize; Promoter; Root; Root-Preferential; Gus

期刊名称： BMC Plant Biology

ISSN： 1471-2229

年卷期： 2019 年 作物代谢调控与营养强化创新团队 卷 JCR学科排名前5%期刊 期

页码：

收录情况： JCR（2021版）

摘要： Background: Modification of root architecture and improvement of root resistance to stresses can increase crop productivity. Functional analyses of root-specific genes are necessary for root system improvement, and root-specific promoters enable research into the regulation of root development and genetic manipulation of root traits. Maize is an important crop species; however, little systematic mining of root-specific genes and promoters has been performed to date. Results: Genomic-scale mining based on microarray data sets followed by transcript detection resulted in the identification of 222 root-specific genes. Gene Ontology enrichment analyses revealed that these 222 root-specific genes were mainly involved in responses to chemical, biotic, and abiotic stresses. Of the 222 genes, 33 were verified by quantitative reverse transcription polymerase chain reaction, and 31 showed root-preferential activity. About 2 kb upstream 5 of the 31 identified root-preferential genes were cloned from the maize genome as putative promoters and named p8463, p5023, p1534, p8531 and p6629. GUS staining of transgenic maize-derived promoter-GUS constructs revealed that the five promoters drove GUS expression in a root-preferential manner. Conclusions: We mined root-preferential genes and their promoters in maize and verified p8463, p5023, p1534, p8531 and p6629 as root-preferential promoters. Our research enables the identification of other tissue-specific genes and promoters in maize and other species. In addition, the five promoters may enable enhancement of target gene(s) of maize in a root-preferential manner to generate novel maize cultivars with resistance to water, fertilizer constraints, or biotic stresses.

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