Plant Physiology and Biochemistry2022，Vol.17815.DOI:10.1016/j.plaphy.2022.02.024

Evolutionary and functional characterisation of glutathione peroxidases showed splicing mediated stress responses in Maize

Mallikarjuna, Mallana Gowdra Sharma, Rinku Veeraya, Palanisamy Tyagi, Akshita Rao, Atmakuri Ramakrishna Chandappa, Lohithaswa Hirenallur Chinnusamy, Viswanathan
Plant Physiology and Biochemistry2022，Vol.17815.DOI:10.1016/j.plaphy.2022.02.024
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  • NSTL
  • Elsevier

Evolutionary and functional characterisation of glutathione peroxidases showed splicing mediated stress responses in Maize

Mallikarjuna, Mallana Gowdra 1Sharma, Rinku 1Veeraya, Palanisamy 1Tyagi, Akshita 1Rao, Atmakuri Ramakrishna 1Chandappa, Lohithaswa Hirenallur 2Chinnusamy, Viswanathan1
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作者信息

  • 1. Indian Agr Res Inst
  • 2. Univ Agr Sci
  • 折叠

Abstract

Maize (Zea mays L) is an important cereal with extensive adaptability and multifaceted usages. However, various abiotic and biotic stresses limit the productivity of maize across the globe. Exposure of plant to stresses disturb the balance between reactive oxygen species (ROS) production and scavenging, which subsequently increases cellular damage and death of plants. Tolerant genotypes have evolved higher output of scavenging antioxidative defence compounds (ADCs) during stresses as one of the protective mechanisms. The glutathione peroxidases (GPXs) are the broad class of ADCs family. The plant GPXs catalyse the reduction of hydrogen peroxide (H2O2), lipid hydroperoxides and organic hydroperoxides to the corresponding alcohol, and facilitate the regulation of stress tolerance mechanisms. The present investigation was framed to study the maize GPXs using evolutionary and functional analyses. Seven GPX genes with thirteen splice-variants and sixty-three types of cis-acting elements were identified through whole-genome scanning in maize. Evolutionary analysis of GPXs in monocots and dicots revealed mixed and lineage-specific grouping patterns in phylogeny. The expression of ZmGPX splice variants was studied in drought and waterlogging tolerant (L1621701) and sensitive (PML10) genotypes in root and shoot tissues. Further, the differential expression of splice variants of ZmGPX1, ZmGPX3, ZmGPX6 and ZmGPX7 and regulatory network analysis suggested the splicing and regulatory elements mediated stress responses. The present investigation suggests targeting the splicing machinery of GPXs as an approach to enhance the stress tolerance in maize.& nbsp;

Key words

Antioxidant enzymes/Drought/Glutathione peroxidases/Maize/Reactive oxygen species/Regulatory network/Splicing/Waterlogging/ASCORBATE PEROXIDASE/EXPRESSION ANALYSES/MOLECULAR-CLONING/GENE FAMILY/WEB SERVER/ARABIDOPSIS/IDENTIFICATION/RICE/ARCHITECTURE/PREDICTION

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出版年

2022
Plant Physiology and Biochemistry

Plant Physiology and Biochemistry

SCI
ISSN：0981-9428
被引量5
参考文献量75
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