Working Paper Article Version 1 This version is not peer-reviewed

Genome-Wide Identification and Expression Analysis of Growth-Regulating Factor Family Genes in Sunflower(Helianthus annuus L.)

Version 1 : Received: 10 December 2019 / Approved: 11 December 2019 / Online: 11 December 2019 (04:58:22 CET)

How to cite: Bing, J.; Xiao, E.; Li, C.; Wang, Z. Genome-Wide Identification and Expression Analysis of Growth-Regulating Factor Family Genes in Sunflower(Helianthus annuus L.). Preprints 2019, 2019120151 Bing, J.; Xiao, E.; Li, C.; Wang, Z. Genome-Wide Identification and Expression Analysis of Growth-Regulating Factor Family Genes in Sunflower(Helianthus annuus L.). Preprints 2019, 2019120151

Abstract

Growth-regulating factor (GRF) is a plant-specific transcription factor family, which is involved in nearly all of the central developmental processes in plants. However, little is known about GRF family genes in cultivated sunflower. In this study, 17 GRF genes were identified and characterized from sunflower genome. Their gene structures, conserved motifs, chromosomal distributions and phylogenetic relationships were analyzed. The expression patterns of these genes were detected in various tissues of sunflower inbred line SK02R, which revealed that the 10 seed-specific GRF genes may play important roles during seed development in sunflower. Additionally, transcripts changes of the GRFs under two major abiotic stresses and phytohormones showed that most of the detected GRFs were reduced significantly by GA3 treatment, and other treatments(ABA, NaCl and PEG6000) differently regulated various sunflower growth-regulating factors at different time points. MiR396 target analysis indicated that there may exist a complicated homeostasis between miR396 and its targets GRF and WRKY transcription factor genes in cultivated sunflower. The phylogenetic and expression analyses of the GRF gene family in sunflower would be useful for further cloning and function exploration of the HaGRF genes.

Subject Areas

sunflower; growth-regulating factor; expression pattern; abiotic stress

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