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Open AccessArticle

Identification of Maize CC-Type Glutaredoxins That Are Associated with Response to Drought Stress

1,2,3,†, 1,2,3,†, 1,2,3, 4 and 1,2,3,*
1
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Agricultural College, Yangtze University, Jingzhou 434000, China
2
Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Agricultural College, Yangtze University, Jingzhou 434000, China
3
Hubei Collaborative Innovation Center for Grain Industry, Agricultural College, Yangtze University, Jingzhou 434000, China
4
Department of Biotechnology, College of Life Science, Yangtze University, Jingzhou 434025, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Genes 2019, 10(8), 610; https://doi.org/10.3390/genes10080610
Received: 9 July 2019 / Revised: 1 August 2019 / Accepted: 7 August 2019 / Published: 12 August 2019
(This article belongs to the Special Issue Abiotic Stress in Plants: Current Challenges and Perspectives)
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Abstract

Global maize cultivation is often adversely affected by drought stress. The CC-type glutaredoxin (GRX) genes form a plant-specific subfamily that regulate plant growth and respond to environmental stresses. However, how maize CC-type GRX (ZmGRXCC) genes respond to drought stress remains unclear. We performed a TBLASTN search to identify ZmGRXCCs in the maize genome and verified the identified sequences using the NCBI conservative domain database (CDD). We further established a phylogenetic tree using Mega7 and surveyed known cis-elements in the promoters of ZmGRXCCs using the PlantCARE database. We found twenty-one ZmGRXCCs in the maize genome by a genome-wide investigation and compared their phylogenetic relationships with rice, maize, and Arabidopsis. The analysis of their redox active sites showed that most of the 21 ZmGRXCCs share similar structures with their homologs. We assessed their expression at young seedlings and adult leaves under drought stress and their expression profiles in 15 tissues, and found that they were differentially expressed, indicating that different ZmGRXCC genes have different functions. Notably, ZmGRXCC14 is up-regulated at seedling, V12, V14, V16, and R1 stages. Importantly, significant associations between genetic variation in ZmGRXCC14 and drought tolerance are found at the seedling stage. These results will help to advance the study of the function of ZmGRXCCs genes under drought stress and understand the mechanism of drought resistance in maize.
Keywords: phylogenetic analysis; CC-type GRX gene family; genetic variation; drought stress; maize; expression pattern phylogenetic analysis; CC-type GRX gene family; genetic variation; drought stress; maize; expression pattern
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ding, S.; He, F.; Tang, W.; Du, H.; Wang, H. Identification of Maize CC-Type Glutaredoxins That Are Associated with Response to Drought Stress. Genes 2019, 10, 610.

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