CaZingipain2 Acts Positively in Pepper ( Capsicum annuum L.) Immunity against R. solanacearum

Bacterial wilt caused by is one of the most important diseases in solanaceous plants, including peppers. It generally tends to be more serious under warm-temperature and moist (WM) conditions than at moist room-temperature (RM) conditions. Although immunity mechanisms at room temperature have been i...

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Bibliographic Details
Published in:Plants (Basel) 2024-09, Vol.13 (18), p.2552
Main Authors: Wu, Ruijie, Wu, Zhen, Qing, Yalin, Duan, Chenfeng, Guo, Yiling, Zhang, Xujing, Huang, Ronghua, He, Shuilin, Qiu, Ailian
Format: Article
Language:English
Subjects:
Amino acids
Cell death
Cysteine proteinase
Disease
DNA binding proteins
Evolution
Gene silencing
Genes
ginger protease
Humidity
Immune system
Immunity
Immunity (Disease)
Infections
Kinases
Leaves
Pathogens
pepper
Peppers
Plant diseases
Plants
Proteins
R. solanacearum
Room temperature
Senescence
Temperature
Vegetables
Wilt
Zingipain
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Summary:Bacterial wilt caused by is one of the most important diseases in solanaceous plants, including peppers. It generally tends to be more serious under warm-temperature and moist (WM) conditions than at moist room-temperature (RM) conditions. Although immunity mechanisms at room temperature have been intensively studied, the mechanisms underlying WM conditions remain poorly understood. Herein, the pepper cysteine protease CaZingipain2 was expressed and functionally characterized in pepper immunity against at WM conditions and at room temperature. The results showed that CaZingipain2 localized to the nucleus and was upregulated at the transcript level in pepper plants upon infection under WM conditions (RSWM). Virus-induced gene silencing of significantly increased the susceptibility of pepper plants to RSWM, and was coupled with the downregulation of and , which are specifically related to pepper immunity against RSWM, according to our previous studies, while its overexpression significantly reduced the susceptibility of plants to RSWM compared to that of wild-type plants. In addition, our data showed that CaZingipain2 also acts positively in pepper immunity against infection at room temperature by upregulating the SA- and JA-responsive PR genes, including and . All these results indicate that improves pepper immunity against under WM conditions and at room temperature by regulating different PR genes.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13182552