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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (10): 2242-2256.doi: 10.16420/j.issn.0513-353x.2022-0682

• Plant Protection • Previous Articles     Next Articles

Molecular Mechanism of MpICE1 Overexpressing Banana Resistant to Fusarium oxysporum Based on Transcriptome Analysis

SHI Jingfang1,3, HU Chunhua1, LI Haochen1, YANG Qiaosong1,4, SHENG Ou1, BI Fangcheng1,2, DONG Tao1, LI Chunyu1, DENG Guiming1, GAO Huijun1, HE Weidi1, LIU Siwen1, YI Ganjun1,*(), DOU Tongxin1,*()   

  1. 1 Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization,Ministry of Agriculture and Rural Affairs,Guangdong Key Laboratory of Tropical and Subtropical Fruit Tree Research,Institute of Fruit Tree Research,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
    2 Labortatory of Lingnan Modern Agriculture Project,Guangdong 510642,China
    3 Guangdong Provincial Key Laboratory for Crop Germplasm Resources Preservation and Utilization,Agro-Biological Gene Research Center,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
    4 Maoming Branch,Guangdong Labortatory for Lingnan Modern Agriculture,Maoming,Guangdong 525000,China
  • Received:2023-03-21 Revised:2023-08-13 Online:2023-10-25 Published:2023-10-31

Abstract:

Based on previous studies,it was found that overexpression of MpICE1 transcription factor in bananas significantly improved the resistance to fusarium wilt. To further reveal the resistance mechanism of MpICE1 to fusarium wilt,the samples from the roots of wild-type and MpICE1 overexpressing bananas before(0 d)and after (7 d and 14 d)Foc TR4 inoculation were collected, and these samples were applied to RNA-sequencing for DEGs analysis. The results showed that the overexpression of MpICE1 could increase the expression of a series of genes before inoculation. These genes were enriched in phenylpropane synthesis,flavonoid synthesis,ABC transporters,MAPK signal transduction,pentose and glucuronic acid conversion pathway,which were related to the structure and function of cell wall. Combined with KEGG pathway analysis,we speculate that overexpression of MpICE1 may elevate the resistance to Foc TR4 by enhancing the basic immunity. In addition,genes higherly expressed in MpICE1 overexpressing bananas began to decline after inoculation,and the interaction between MpICE1 overexpressing bananas and pathogens reached a relatively stable state seven days after inoculation. Compared with the wild type,only a small amount of DEGs were found in MpICE1 overexpressing bananas 7 and 14 days after incolation. The expression dynamic of DEGs revealed that 12-oxophytodienoic acid reductase (Ma06_g18840),which is related to oxidation lipid metabolism (JA and OPDA),may be the target gene of MpICE1. Moreover,the expression of ubiquitin carboxyl-terminal hydrolase 36/42 was also affected by MpICE1 overexpression. However,the specific mechanism was still unknown,and need further study.

Key words: banana, Fusarium oxysporum, MpICE1, RNA-seq