The role of the MAP kinase−kinase protein StMKK1 in potato immunity to different pathogens

Mitogen-activated protein kinase (MAPK) cascades play important roles in plant immunity. Previously, we reported that the potato StMKK1 protein negatively regulates Nicotiana benthamiana resistance to Phytophthora infestans . However, the functions of StMKK1 in potato immunity are unknown. To invest...

Full description

Saved in:
Bibliographic Details
Published in:Horticulture research 2021-06, Vol.8 (1), Article 117
Main Authors: Chen, Xiaokang, Wang, Wenbin, Cai, Pingping, Wang, Ziwei, Li, Tingting, Du, Yu
Format: Article
Language:English
Subjects:
631/449/2169
631/449/2661
Agriculture
Biomedical and Life Sciences
Blight
Ecology
Fungi
Immune response
Immunity
Investigations
Kinases
Life Sciences
MAP kinase
Pathogens
Phytophthora infestans
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Plant growth
Plant immunity
Plant Sciences
Potatoes
Protein kinase
Proteins
Salicylic acid
Vegetables
Wilt
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mitogen-activated protein kinase (MAPK) cascades play important roles in plant immunity. Previously, we reported that the potato StMKK1 protein negatively regulates Nicotiana benthamiana resistance to Phytophthora infestans . However, the functions of StMKK1 in potato immunity are unknown. To investigate the roles of StMKK1 in potato resistance to different pathogens, such as the potato late-blight pathogen P. infestans , the bacterial wilt pathogen Ralstonia solanacearum , and the gray-mold fungal pathogen Botrytis cinerea , we generated StMKK1 transgenic lines and investigated the response of potato transformants to destructive oomycete, bacterial, and fungal pathogens. The results showed that overexpression and silencing of StMKK1 do not alter plant growth and development. Interestingly, we found that StMKK1 negatively regulated potato resistance to the hemibiotrophic/biotrophic pathogens P. infestans and R. solanacearum , while it positively regulated potato resistance to the necrotrophic pathogen B. cinerea . Further investigation showed that overexpression of StMKK1 suppressed potato pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and salicylic acid (SA)-related responses, while silencing of StMKK1 enhanced PTI and SA-related immune responses. Taken together, our results showed that StMKK1 plays dual roles in potato defense against different plant pathogens via negative regulation of PTI and SA-related signaling pathways.
ISSN:2662-6810
2052-7276
DOI:10.1038/s41438-021-00556-5