Abstract
Limited information is available on the cold acclimation of non-heading Chinese cabbage (NHCC) under low temperatures. In this study, the isobaric tags for relative and absolute quantification (iTRAQ) were used to illustrate the molecular machinery of cold acclimation. Compared to the control (Cont), altogether, 89 differentially expressed proteins (DEPs) were identified in wucai leaves responding to low temperatures (LT). Among these proteins, 35 proteins were up-regulated ((and 54 were down-regulated). These differentially expressed proteins were categorized as having roles in carbohydrate metabolism, photosynthesis and energy metabolism, oxidative defense, amino acid metabolism, metabolic progress, cold regulation, methylation progress, and signal transduction. The fructose, glucose, and sucrose were dramatically increased in response to cold acclimation. It was firstly reported that aspartate, serine, glutamate, proline, and threonine were significantly accumulated under low temperatures. Results of quantitative real-time PCR analysis of nine DEPs displayed that the transcriptional expression patterns of six genes were consistent with their protein expression abundance. Our results demonstrated that wucai acclimated to low temperatures through regulating the expression of several crucial proteins. Additionally, carbohydrate and amino acid conversion played indispensable and vital roles in improving cold assimilation in wucai.
Highlights
Low temperature (LT) is a major determinant that limits the geographical distribution and growing season of plants [1]
After the samples were detected by LC-MS/MS, a total of 26,048 unique were generated with proteins
Plants acquire tolerance based on prior exposure to low temperatures, various plantacclimation, species differ in their ability to confront stress,exposure which isto governed by appropriate
Summary
Low temperature (LT) is a major determinant that limits the geographical distribution and growing season of plants [1]. Overwintering plants may increase their cold tolerance when exposed to low temperatures. This process is known as cold acclimation, which begins following exposure to low, non-freezing temperatures. Many studies have reported symptoms and metabolism changes in response to cold stress or chilling stress [2], including photoinhibition [3], carbohydrate accumulation [4], and signal transduction [5].
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