Abstract
C-repeat binding factor- (CBF-) dependent signaling pathway is proposed to be a key responder to low temperature stress in plant. Jasmonates (JAs), the endogenous signal molecules in plant, participate in plant defense against (a)biotic stresses; however, the mechanism has not been fully clarified so far. With the progress made in JAs biopathway, signal transduction, and their relationship with CBF-dependent signaling pathway, our knowledge of the roles of the CBF-dependent signaling pathway in JAs-mediated improvement of chilling tolerance accumulates. In this review, we firstly briefly review the chilling injury (CI) characteristics of postharvest horticultural commodities, then introduce the biopathway and signal transduction of JAs, subsequently summarize the roles of the CBF-dependent signaling pathway under low temperature stress, and finally describe the linkage between JAs signal transduction and the CBF-dependent signaling pathway.
Highlights
Preservation, transportation, and marketing of postharvest horticultural commodities at low temperatures constitute the main strategy employed in food industries to retard quality deterioration [1]
Three C-repeat binding factors (CBFs), which are involved in low temperature stress, have been identified in Arabidopsis, including AtCBF1, AtCBF2, and AtCBF3 [10]
In combination with previous reports [6, 9, 78, 84], the primary signal transduction process after prechilling JAs treatment to activate C-repeat binding factor- (CBF-)dependent signaling pathway in order to improve the chilling resistance of postharvest horticultural commodities is illustrated in Figure 6: higher JAs content after prechilling JAs treatment triggers COI1mediated degradation of JAZs, releasing MYC2 and ICE1
Summary
Preservation, transportation, and marketing of postharvest horticultural commodities at low temperatures constitute the main strategy employed in food industries to retard quality deterioration [1]. Upon exposure to (a)biotic stresses, the increase of endogenous JAs precedes the activation of JAs-mediated defense [18]; the application of exogenous JAs at proper concentrations could effectively ameliorate CI symptoms of postharvest horticultural commodities, such as papaya, avocado, banana, and tomato (Table 2), and this effect might be due to the activation of various physiological and biochemical responses [19]. This mechanism has not yet been fully clarified. This review would provide a deeper understanding on the mechanism employed by prechilling JAs treatment to mitigate CI of postharvest horticultural commodities
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