Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (11): 2085-2097.DOI: 10.3969/j.issn.1004-1524.2021.11.11

• Horticultural Science • Previous Articles     Next Articles

Study on resistance of different tomato germplasm materials to yellow leaf curl virus disease

WANG Xian(), LIU Fang, WEI Xiaohong*(), ZHU Xiaolin, WANG Baoqiang   

  1. College of Life Science and Technology, Gansu Agricultural University, Gansu Key Lab of Crop Genetic & Germplasm Enhancement, Gansu Provincial Key Lab of Aridland Crop Science, Lanzhou 730070, China
  • Received:2020-08-22 Online:2021-11-25 Published:2021-11-26
  • Contact: WEI Xiaohong

Abstract:

Different tomato materials were inoculated with tomato yellow leaf curl virus (TYLCV) by Agrobacterium tumefaciens infiltration. Real-time quantitative PCR and physiological and biochemical methods were used to evaluate the resistance to TYLCV. The phenotypic characteristics, virus carrying rate, antioxidant enzyme activity, secondary metabolite content and resistance gene expression of tomato materials with different resistance were analyzed. The results showed that the virus infection rates of tomato materials were 100%; the tested variety 853 had no symptoms, while 802 and 803 were the most susceptible; the varieties 867, 857 and 853 had higher antioxidant enzyme activity, contents of total phenols and flavonoids, and higher resistance gene expression, followed by 817 and 842, the lowest was 803. SOD activity, CAT activity, APX activity, total phenol content, flavonoid content, Ty-1 gene, Ty-2 and Ty-3 gene expression levels were significantly positively correlated with each other (total phenol and Ty-1 showed significantly positive correlation, P<0.01). Compared with other disease resistance genes, the expression of Ty-1 was delayed after tomato plants were infected with TYLCV. The resistance genes, antioxidant enzymes, total phenols and flavonoids in plants were significantly positively correlated, which jointly improved the resistance of tomato plants to TYLCV.

Key words: tomato, tomato yellow leaf curl virus disease, antioxidant enzymes, secondary metabolites, resistance gene, resistance

CLC Number: