A proteomic analysis of grain yield-related traits in wheat. Issue 5 (24th August 2020)

• Record Type: Journal Article
• Authors: Daba, Sintayehu D; Liu, Xiaoqin; Aryal, Uma; Mohammadi, Mohsen
• Editors: Ismail, Abdelbagi
• Is Part Of: AoB plants. Volume 12:Issue 5(2020)
• Publication Date: 2020-08-24
• Subjects: Differentially abundant proteins -- label-free quantitative proteomics -- unique and shared proteins -- yield-contributing organs; Plants -- Periodicals; Botany -- Periodicals; 580.5
• DOI: 10.1093/aobpla/plaa042
• Languages: English
• ISSNs: 2041-2851

Abstract

Abstract: Grain yield, which is mainly contributed by tillering capacity as well as kernel number and weight, is the most important trait to plant breeders and agronomists. Label-free quantitative proteomics was used to analyse yield-contributing organs in wheat. These were leaf sample, tiller initiation, spike initiation, ovary and three successive kernel development stages at 5, 10 and 15 days after anthesis (DAA). We identified 3182 proteins across all samples. The largest number was obtained for spike initiation (1673), while the smallest was kernel sample at 15 DAA (709). Of the 3182 proteins, 296 of them were common to all seven organs. Organ-specific proteins ranged from 148 in ovary to 561 in spike initiation. When relative protein abundances were compared to that of leaf sample, 347 and 519 proteins were identified as differentially abundant in tiller initiation and spike initiation, respectively. When compared with ovary, 81, 35 and 96 proteins were identified as differentially abundant in kernels sampled at 5, 10 and 15 DAA, respectively. Our study indicated that two Argonaute proteins were solely expressed in spike initiation. Of the four expansin proteins detected, three of them were mainly expressed during the first 10 days of kernel development after anthesis. We also detected cell wall invertases and sucrose and starch synthases mainly during the kernel development period. The manipulation of these proteins could lead to increases in tillers, kernels per spike or final grain weight, and is worth exploring in future studies. Abstract : We studied the proteome profiles during the kernel development process in wheat. Using proteomics procedure, seven plant organs were quantified for protein abundance. A total of 3182 proteins were identified across all the organs. Two hundred ninety-six proteins were identified in all the organs. This study demonstrated organ-specific detection and abundance of many important wheat proteins that may contribute to tiller formation, spike initiation and kernel development. The findings from this study could pave the way for in-depth study of the different components of yield formation in wheat.