Abstract:
BACKGROUND:Superficial scald is a physiological disorder of apple fruit characterized by sunken, necrotic lesions appearing after prolonged cold storage, although initial injury occurs much earlier in the storage period. To determine the degree to which the transition to cell death is an active process and specific metabolism involved, untargeted metabolic and transcriptomic profiling was used to follow metabolism of peel tissue over 180 d of cold storage. RESULTS:The metabolome and transcriptome of peel destined to develop scald began to diverge from peel where scald was controlled using antioxidant (diphenylamine; DPA) or rendered insensitive to ethylene using 1-methylcyclopropene (1-MCP) beginning between 30 and 60 days of storage. Overall metabolic and transcriptomic shifts, representing multiple pathways and processes, occurred alongside α-farnesene oxidation and, later, methanol production alongside symptom development. CONCLUSIONS:Results indicate this form of peel necrosis is a product of an active metabolic transition involving multiple pathways triggered by chilling temperatures at cold storage inception rather than physical injury. Among multiple other pathways, enhanced methanol and methyl ester levels alongside upregulated pectin methylesterases are unique to peel that is developing scald symptoms similar to injury resulting from mechanical stress and herbivory in other plants.
journal_name
BMC Plant Bioljournal_title
BMC plant biologyauthors
Gapper NE,Hertog MLATM,Lee J,Buchanan DA,Leisso RS,Fei Z,Qu G,Giovannoni JJ,Johnston JW,Schaffer RJ,Nicolaï BM,Mattheis JP,Watkins CB,Rudell DRdoi
10.1186/s12870-017-1030-6subject
Has Abstractpub_date
2017-04-21 00:00:00pages
77issue
1issn
1471-2229pii
10.1186/s12870-017-1030-6journal_volume
17pub_type
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