GRP genes in potato genome and their expression response to phytohormone and Ralstonia solanacearum

Cell wall glycine‐rich proteins (GRPs) play important roles in plant growth and development, as well as in the effective prevention of plant diseases. Although members of the GRP family have been identified in several plants, a comprehensive analysis of GRPs has not been reported in Solanaceae plant...

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Published in:Journal of phytopathology 2022-10, Vol.170 (10), p.724-737
Main Authors: Luo, Yongping, Wang, Cong, Yang, Rujie, Liu, Hongliang, Suo, Yanyun, Gao, Gang
Format: Article
Language:English
Subjects:
cell wall
Cell walls
Comparative studies
Digoxin
Fibers
Fluorescence in situ hybridization
Gene expression
Genes
Genomes
Glycine
glycine‐rich protein
Heat stress
Heat tolerance
Inoculation
Localization
Pathogens
Peppers
Physical properties
Phytohormones
Plant bacterial diseases
Plant diseases
Plant growth
Plant hormones
potato
Potatoes
Ralstonia solanacearum
Solanaceae
Solanum tuberosum
Thickening
Tubers
Wilt
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Summary:Cell wall glycine‐rich proteins (GRPs) play important roles in plant growth and development, as well as in the effective prevention of plant diseases. Although members of the GRP family have been identified in several plants, a comprehensive analysis of GRPs has not been reported in Solanaceae plants. In this study, 43 GRPs were identified from Solanum tuberosum (named StGRPs), Solanum lycopersicum, Capsicum annuum and Nicotiana attenuata. The comparative study of these GRPs showed that they were conservative in physical properties, structures of genes and motifs. The expression patterns of Solanum tuberosum StGRPs under biotic and abiotic stress were analysed and presented very diverse profiles in responding to ABA, IAA, GA3, high salinity, pathogen and heat stress. Some StGRPs were preferentially and specifically expressed during the development of petioles and tubers, in which the expression of StGRPs was more sensitive to ABA confirmed by qRT‐PCR analysis. The strongly up‐regulated expression of StGRP1 induced by Ralstonia solanacearum indicated the positive role involved in the resistance against the bacterial wilt pathogen. Tissue localization analyses by Digoxin/fluorescence in situ hybridization indicated that the expression of StGRP1 was vascular‐specific and associated with cell wall thickening in vascular bundles and interfascicular fibres after R. solanacearum inoculation. These findings may provide a new insight into the roles of GRPs in adaptation to diverse stresses and in resistance to R. solanacearum in potatoes.
ISSN:0931-1785
1439-0434
DOI:10.1111/jph.13136