Genome-wide investigation and expression analysis of APETALA-2 transcription factor subfamily reveals its evolution, expansion and regulatory role in abiotic stress responses in Indica Rice (Oryza sativa L. ssp. indica)
文献类型： 外文期刊
作者： Ahmed, Sohaib 1 ; Rashid, Muhammad Abdul Rehman 2 ; Zafar, Syed Adeel 4 ; Azhar, Muhammad Tehseen 1 ; Waqas, Muh 1 ;
作者机构： 1.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad 38040, Pakistan
2.Yunnan Univ, Sch Agr, Res Ctr Perennial Rice Engn & Technol Yunnan, State Key Lab Conservat & Utilizat Bioresources Y, Kunming 650500, Yunnan, Peoples R China
3.Yunnan Acad Agr Sci, Ind Crops Res Inst, Kunming 650200, Yunnan, Peoples R China
4.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing, Peoples R China
5.Zhengzhou Univ, Sch Agr Sci, Zhengzhou 450000, Peoples R China
6.Univ Agr Faisalabad, Ctr Agr Biochem & Biotechnol, Faisalabad 38040, Pakistan
7.Govt Coll Univ, Dept Bioinformat & Biotechnol, Faisalabad 38000, Pakistan
8.Chonnam Natl Univ, Dept Biotechnol, Chungnam 59626, South Korea
9.Muhammad Nawaz Shareef Univ Agr, Inst Plant Breeding & Biotechnol, Multan 66000, Pakistan
10.Univ Agr Faisalabad, Ctr Adv Studies Agr & Food Secur CAS AFS, Faisalabad 38040, Pakistan
关键词： APETALA-2; Gene expression; Stress response; Phylogenetic analysis
期刊名称：GENOMICS （ 影响因子：5.736； 五年影响因子：4.939 ）
ISSN： 0888-7543
年卷期： 2021 年 113 卷 1 期
页码：
收录情况： SCI
摘要： Rice is an important cereal crop that serves as staple food for more than half of the world population. Abiotic stresses resulting from changing climatic conditions are continuously threating its yield and production. Genes in APETALA-2 (AP2) family encode transcriptional regulators implicated during regulation of developmental processes and abiotic stress responses but their identification and characterization in indica rice was still missing. In this context, twenty-six genes distributed among eleven chromosomes in Indica rice encoding AP2 transcription factor subfamily were identified and their diverse haplotypes were studied. Phylogenetic analysis of OsAP2 TF family-members grouped them into three clades indicating conservation of clades among cereals. Segmental duplications were observed to be principal route of evolution, supporting the higher positive selection-pressure, which were estimated to be originated about 10.57 to 56.72 million years ago (MYA). Conserved domain analysis and intron-exon distribution pattern of identified OsAP2s revealed their exclusive distribution among the specific clades of the phylogenetic tree. Moreover, the members of osa-miR172 family were also identified potentially targeting four OsAP2 genes. The real-time quantitative expression profiling of OsAP2s under heat stress conditions in contrasting indica rice genotypes revealed the differential expression pattern of OsAP2s (6 genes up regulated and 4 genes down-regulated) in stressand genotype-dependent manner. These findings unveiled the evolutionary pathways of AP2-TF in rice, and can help the functional characterization under developmental and stress responses
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