Comprehensive Genome-Wide Identification and Characterization of the AP2 Subfamily in Beta vulgaris L. in Response to Exogenous Abscisic Acid

Yan Zhai, Yuanrong Ni, Hao Wang, Yuanhang Zhou and Wang Xing ()
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Yan Zhai: National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin 150080, China
Yuanrong Ni: National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin 150080, China
Hao Wang: National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin 150080, China
Yuanhang Zhou: Manas Agricultural Experimental Station, Xinjiang Academy of Agricultural Sciences, Changji 832200, China
Wang Xing: National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin 150080, China

Agriculture, 2024, vol. 14, issue 8, 1-14

Abstract: APETALA2 (AP2) belongs to transcription factor (TF) families, with crucial roles in regulating plant growth, development, and stress responses. In order to explore the characteristics of sugar beet ( Beta vulgaris L.) AP2s ( BvAP2s ) in response to drought stress hormone abscisic acid (ABA), genome-wide identification, and the phylogeny, gene structure and promoter precursor analysis of the BvAP2s were employed to predict their potential functions. It is shown that there are a total of 13 BvAP2 genes in the Beta vulgaris . Based on the primary amino acid sequence, the BvAP2s can be further subdivided into euAP2, euANT and basalANT. In addition, cis-acting element analysis showed that BvAP2s contained several abiotic stress-related elements, including those associated with ABA and drought stress. Roots are the first to perceive stress signals, and ABA-treated beetroot transcriptome and downstream gene prediction of BvAP2s revealed that BVRB_4g074790 , BVRB_6g128480 and BVRB_7g179610 may play an important role involved in ABA signaling pathways during the stress response by regulating downstream GRAM genes, LEAs and U-boxes. Additionally, quantitative real-time polymerase chain reaction (qRT-PCR) further confirmed the downregulation of these three BvAP2s in response to ABA induction in sugar beet roots. These findings provide a basis for future utilization of BvAP2s in developing drought-tolerant Beta vulgaris varieties.

Keywords: Beta vulgaris; AP2; TF; exogenous ABA; drought stress (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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