Pinghua Fan^1,2 , Kaikai Zhu^1,2 , Pengpeng Tan^1,2 , Fangren Peng^1,2 , Yongrong Ling³

1 Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
2 College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
3 Nanjing Green Universe Pecan Science and Technology Co. Ltd, Nanjing, 211500, China
Author    Correspondence author
Molecular Plant Breeding, 2023, Vol. 14, No. 13   doi: 10.5376/mpb.2023.14.0013
Received: 24 May, 2023    Accepted: 05 Jun., 2023    Published: 15 Jun., 2023

This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Fan P.H., Zhu K.K., Tan P.P., Peng F.R., and Ling Y.R., 2023, Identification of Aux/IAA gene family in pecan (Carya illinoinensis) and its expression in graft healing, Molecular Plant Breeding, 14(13): 1-10 (doi: 10.5376/mpb.2023.14.0013)

Aux/IAA (Auxin/Indole- 3- Acetic Acid) family, one of the early response gene family of auxin signals, is involved in regulating numerous aspects of plant growth and development. As an important economic plant, the identification of Aux/IAA family genes in pecan is of great significance. In this study, a total of 37 Aux/IAA family genes were identified in the pecan genome using bioinformatics method, subcellular localization revealed that all its members are located in the nucleus. Based on the phylogenic relationship with Arabidopsis Aux/IAAs gene, the 37 pecan Aux/IAA gene were categorized into two major groups (A and B). Multiple sequence alignment analysis showed that there were four typical conserved domains (I-IV) in Aux/IAA proteins of pecan. The cis-acting elements analysis revealed that all pecan Aux/IAAs had cis-acting elements in response to hormones in the promoter regions. According to the expression patterns of pecan Aux/IAA genes during graft healing, four genes with high expression were identified, which may play important roles in the formation of graft union in pecan. This study will be helpful to elucidate the function of pecan Aux/IAAs in the process of graft healing and find candidate genes.

Carya illinoinensis; Aux/IAA; Grafting; Expression patterns