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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (6): 1123-1134.doi: 10.16420/j.issn.0513-353x.2020-0806

• Research Papers • Previous Articles     Next Articles

Cloning and Expression Analysis of BoPID in Brassica oleracea

ZHANG Hecui, WANG Yukui, ZUO Tonghong, LIU Qianying, ZHANG Yizhong, HU Dengke, XIE Qinqin, ZHU Liquan()   

  1. College of Agronomy and Biotechnology,Southwest University,Chongqing 400715,China
  • Received:2021-02-04 Revised:2021-03-02 Online:2021-06-25 Published:2021-07-07
  • Contact: ZHU Liquan E-mail:zhuliquan@swu.edu.cn

Abstract:

The BoPID was found as one of the interactive protein of BoSPx through yeast two-hybrid screening assay in Brassica oleracea. Its characters such as coding sequence,spatiotemporal expression and interactive proteins were further analyzed,with the purpose of studying its possible role in interacting with the calcium-responsive protein BoSPx in the process of self-incompatibility. The results showed that BoPID encodes 439 amino acids and contains two exons and one intron. BoPID may have kinase activity based on the kinase phosphorylation prediction analysis of its sequence,its sequence is highly homologous with AtPIDat the chromosome level and has strong species specificity when clustering with cruciferous plants such as turnip,Arabidopsis and Brassica napusin the phylogeny and collinearity analysis. Additionally,its promoter area contains multiple response elements such as ABA,IAA,abscisic acid,jasmonic acid,salicylic acid and stress response. The spatiotemporal expression analysis indicated thatBoPID expressed higher in the stigma than that in other parts of floral organs,while it was up-regulated after 15 minutes of self-pollination and then down-regulated. In the analysis of subcellular localization,we found BoPID protein localized in the cell membrane and cytoplasm,indicating that it might be an amphibious protein and anchored on the membrane and synapses in the cytoplasm. We further found the proteins of BoCML12,BoCaM2 and BoPIN1 interact with BoPID in the assays of yeast two-hybrid and GST-Pull down. Based on these results,we reason that BoPID might play a role in regulating calcium response to auxin through interacting with BoSPx,BoCML12 and BoCaM2 in the process of self-incompatibility.

Key words: Brassica oleracea, yeast library, self-pollination, BoSPx, BoPID

CLC Number: