Small Secreted Peptides Encoded on the Wheat ( L.) Genome and Their Potential Roles in Stress Responses

Overview

Journal Front Plant Sci

Date 2022 Oct 10

PMID 36212358

Authors

Dongdong Tian

Qi Xie

Zhichao Deng

Jin Xue

Wei Li

Zenglin Zhang

Yifei Dai

Bo Zheng

Tiegang Lu

Ive De Smet

Yongfeng Guo

Affiliations

Soon will be listed here.

Abstract

Small secreted peptides (SSPs) are important signals for cell-to-cell communication in plant, involved in a variety of growth and developmental processes, as well as responses to stresses. While a large number of SSPs have been identified and characterized in various plant species, little is known about SSPs in wheat, one of the most important cereal crops. In this study, 4,981 putative SSPs were identified on the wheat genome, among which 1,790 TaSSPs were grouped into 38 known SSP families. The result also suggested that a large number of the putaitive wheat SSPs, Cys-rich peptides in particular, remained to be characterized. Several genes were found to encode multiple SSP domains, including CLE, HEVEIN and HAIRPININ domains, and two potentially novel TaSSP family DYY and CRP8CI were identified manually among unpredicted TaSSPs. Analysis on the transcriptomic data showed that a great proportion of TaSSPs were expressed in response to abiotic stresses. Exogenous application of the TaCEPID peptide encoded by TraesCS1D02G130700 enhanced the tolerance of wheat plants to drought and salinity, suggesting porential roles of SSPs in regulating stress responses in wheat.

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