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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (1): 60-72.doi: 10.16420/j.issn.0513-353x.2020-0295

• Research Papers • Previous Articles     Next Articles

Cloning and Functional Analyses of BrNAP in Postharvest Leaf Senescence in Chinese Flowering Cabbage

LI Yuzhuo1, LIU Ke1, YUAN Lu1, CAO Liwen1, WANG Tingjin1, GAN Susheng2,**(), CHEN Liping1,**()   

  1. 1Department of Horticulture,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310058,China
    2Plant Biology Section,School of Integrative Plant Science,Cornell University,Ithaca,NY 14853,USA
  • Received:2020-06-08 Revised:2020-07-27 Online:2021-01-25 Published:2021-01-29
  • Contact: GAN Susheng,CHEN Liping E-mail:sg288@cornell.edu;chenliping@zju.edu.cn

Abstract:

This research revealed the cloning and functional analyses of AtNAP orthologous gene named BrNAP1 in Chinese flowering cabbage(Brassica rapa var. parachinensis). The coding region of BrNAP1 is 813 bp in length and encodes 270 amino acids. It has a unique conserved domain of NAP transcription factors and belongs to the NAP subfamily. BrNAP1 expression increases with the progression of leaf senescence and can be induced by ABA treatment. Subcellular localization experiment revealed that BrNAP1 is a nuclear protein. Complementary experiments showed that BrNAP1 can restore the Arabidopsis atnap phenotype to the wild type. Overexpression of BrNAP1 causes precocious leaf senescence. BrNAP1 transcriptionally induced the activity of BrSAG113 in dual-luciferase assay. These results suggested that BrNAP1 has the AtNAP-like function and is a positive regulator gene of leaf senescence in Chinese flowering cabbage.

Key words: Chinese flowering cabbage, postharvest, leaf senescence, BrNAP1, functional analysis, abscisic acid

CLC Number: