Mechano-stimulated modifications in the chloroplast antioxidant system and proteome changes are associated with cold response in wheat

Authors:
Open Access
Publisher website
Google Scholar
Abstract
Mechanical wounding can cause morphological and developmental changes in plants, which may affect the responses to abiotic stresses. However, the mechano-stimulation triggered regulation network remains elusive. Here, the mechano-stimulation was applied at two different times during the growth period of wheat before exposing the plants to cold stress (5.6 °C lower temperature than the ambient temperature, viz., 5.0 °C) at the jointing stage. Results showed that mechano-stimulation at the Zadoks growth stage 26 activated the antioxidant system, and substantially, maintained the homeostasis of reactive oxygen species. In turn, the stimulation improved the electron transport and photosynthetic rate of wheat plants exposed to cold stress at the jointing stage. Proteomic and transcriptional analyses revealed that the oxidative stress defense, ATP synthesis, and photosynthesis-related proteins and genes were similarly modulated by mechano-stimulation and the cold stress. It was concluded that mechano-stimulated modifications of the chloroplast antioxidant system and proteome changes are related to cold tolerance in wheat. The findings might provide deeper insights into roles of reactive oxygen species in mechano-stimulated cold tolerance of photosynthetic apparatus, and be helpful to explore novel approaches to mitigate the impacts of low temperature occurring at critical developmental stages.
Funding Information
  • National Natural Science Foundation for Distinguished Young Scientists (31325020)
  • National Natural Science Foundation of China (31171484, 31471445)
  • Specialized Research Fund for the Doctoral Program of Higher Education (20090097110009)
  • National Non-profit Program by Ministry of Agriculture (200903003)
  • China Agriculture Research System (CARS-03)

This publication has 40 references indexed in Scilit: