文献类型： 外文期刊
作者： Liu, Shuai 1 ; Yu, Yang 1 ; Guo, Ke 1 ; Zhang, Qian 1 ; Jia, Zhaodong 1 ; Alfredo, Morales Rodriguez 2 ; Ma, Peiyong 1 ; Xie, Hao 3 ; Bian, Xiaofeng 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, Prov Key Lab Agrobiol, Nanjing, Peoples R China
2.Res Inst Trop Roots & Tuber Crops INIVIT, Ctr Trop Crop Res, Santo Domingo, Cuba
3.Chinese Acad Agr Sci, Xuzhou Inst Agr Sci, Xuzhou, Peoples R China
关键词： griffithsin; sweetpotato (Ipomoea batatas (L.) Lam); sweetpotato virus disease; sweetpotato leaf curl virus; antiviral genes
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.3 ）
ISSN： 1664-462X
年卷期： 2024 年 15 卷
页码：
收录情况： SCI
摘要： Griffithsin (GRFT) is a highly effective, broad-spectrum, safe, and stable viral inhibitor used to suppress a variety of viruses. However, little information is available on whether GRFT can prevent plant viral diseases. In this study, we constructed a GRFT overexpression vector containing the sweetpotato storage cell signal peptide and generated exogenous GRFT overexpression lines through genetic transformation. The transgenic plants showed notable resistance to sweetpotato virus disease in the virus nursery. To verify the antiplant virus function of GRFT, transient expression in tobacco leaves showed that GRFT inhibited the sweetpotato leaf curl virus (SPLCV). The replication of SPLCV was entirely inhibited when the concentration of GRFT reached a certain level. The results of pulldown and BIFC assays showed that GRFT did not interact with the six components of SPLCV. In addition, the mutated GRFTD/A without the binding ability of carbohydrate and anticoronavirus function, in which three aspartate residues at carbohydrate binding sites were all mutated to alanine, also inhibited SPLCV. Quantitative reverse-transcription PCR analyses showed that the tobacco antiviral-related genes HIN1, ICS1, WRKY40, and PR10 were overexpressed after GRFT/GRFTD/A injection. Furthermore, HIN1, ICS1, and PR10 were more highly expressed in the leaves injected with GRFTD/A. The results suggest that sweetpotato is able to express GRFT exogenously as a bioreactor. Moreover, exogenous GRFT expression inhibits plant viruses by promoting the expression of plant antiviral genes.
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