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Methyl Jasmonate Promotes Phospholipid Remodeling and Jasmonic Acid Signaling To Alleviate Chilling Injury in Peach Fruit
journal contribution
posted on 2019-08-23, 19:43 authored by Mengshuang Chen, Huimin Guo, Shuqi Chen, Tingting Li, Meiqing Li, Arif Rashid, Changjie Xu, Ke WangChilling injury (CI) is a physiological
disorder induced by cold,
which heavily limit crop production and postharvest preservation worldwide.
Methyl jasmonate (MeJA) can alleviate CI in various fruit species,
including peach; however, the underlying molecular mechanism is poorly
understood. Here, changes in contents of phenolics, lipids, and jasmonic
acid (JA) and gene expressions are compared between MeJA and control
fruit. Exogenous MeJA inhibited expressions of PpPAL1, PpPPO1, and PpPOD1/2 but did
not affect the phenolic content. Furthermore, MeJA fruit showed lower
relative electrolyte leakage, indicating less membrane damage. Meanwhile,
the enrichment of linoleic acid in the potential lipid biomarkers,
especially phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol,
coincided with lower expressions of PpFAD8.1 but
higher PpLOX3.1 and JA content. In the JA signaling
pathway, MeJA significantly upregulated expressions of PpMYC2.2 and PpCBF3 but downregulated PpMYC2.1. In conclusion, adjustments of fatty acids in phospholipids contribute
to MeJA-induced alleviation of CI in peach fruit via induction of
the JA-mediated C-repeat-binding factor pathway.
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Methyl jasmonateMethyl Jasmonate Promotes Phospholipid Remodelinglimit crop productionphenolic contentAlleviate Chilling InjuryExogenous MeJAgene expressionsPeach Fruit Chilling injuryPpCBF 3membrane damageJA contentlipid biomarkersPpFAD 8.1postharvest preservationCIdownregulated PpMYC 2.1PpLOX 3.1jasmonic acidPpMYC 2.2PpPAL 1MeJA fruitPpPPO 1control fruitlinoleic acidJA-mediated C-repeat-binding factor pathwayupregulated expressionselectrolyte leakagepeach fruitMeJA-induced alleviationfruit species
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