Biotechnology Bulletin ›› 2023, Vol. 39 ›› Issue (11): 270-282.doi: 10.13560/j.cnki.biotech.bull.1985.2023-0530

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Expression Analysis of the ZF-HD Gene Family in Chrysanthemum nankingense Under Drought and ABA Treatment

CHEN Chu-yi(), YANG Xiao-mei, CHEN Sheng-yan, CHEN Bin, YUE Li-ran()   

  1. College of Landscape Architecture, Northeast Forestry University, Harbin 150040
  • Received:2023-06-05 Online:2023-11-26 Published:2023-12-20
  • Contact: YUE Li-ran E-mail:chen629@qq.com;ms_yueliran@163.com

Abstract:

Drought is an important abiotic factor affecting the growth and yield of chrysanthemum, while ZF-HD transcription factor family plays an important role in coping with drought stress. Chrysanthemum nankingense is a model plant for studying genetic and breeding mechanism of chrysanthemum, screening its drought resistance related genes may lay a foundation for the relevant research in chrysanthemum. In this study, we established a local database and achieving local BLAST based on the C. nankingense genome, and used the Pfam database, HMMER, DNAMAN, MEGA, Tbtools, ExPASy, WoLF PSORT online sites and real-time fluorescence quantification for screening as well as bioinformatics and expression analysis of ZF-HD family genes. The results showed that a total of 19 ZF-HD gene family members were identified in the C. nankingense, divided into two subfamilies, ZHD and MIF, with the ZHD subfamily including subgroup I-VI. The tissue specific expressions of family members were temporally and spatially variable, their promoter regions were enriched with growth and development, stress and hormone-related response elements. The results of RT-qPCR showed that 19 CnZF-HD genes all responded to the drought stress and ABA treatment, and expression was induced under drought conditions. The genes CnZF-HD4, CnZF-HD9, CnZF-HD10, CnZF-HD14, CnZF-HD15 and CnZF-HD19 were also induced to be expressed in ABA treatment. Subgroup VI played an important role in regulating the drought resistance of C. nankingense. In addition, the expression of CnZF-HD1 gene was continuously up-regulated under drought conditions, thus it could be a candidate gene for drought resistance, but its sensitivity to ABA needs further study.

Key words: Chrysanthemum nankingense, drought stress, ZF-HD gene, transcription factor, ABA, bioinformatics, expression analysis