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Investigation of the transcriptomic and metabolic changes associated with superficial scald physiology impaired by lovastatin and 1-methylcyclopropene in pear fruit(cv.“Blanquilla”)

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Horticulture Research 2020年第1期7卷 2229-2245页

作者： Jordi Giné-Bordonaba Nicola Busatto Christian Larrigaudière Violeta Lindo-García Gemma Echeverria Urska Vrhovsek Brian Farneti Franco Biasioli Concetta De Quattro marzia rossato Massimo Delledonne Fabrizio Costa XaRTA-Postharvest Institute for Food and Agricultural Research and Technology(IRTA)Edifici FruitcentreParc Científic i Tecnològic Agroalimentari de Lleida25003 LleidaSpain Department of Genomics and Biology of Fruit Crops Research and Innovation CentreFondazione Edmund Machvia Mach 138010 San Michele all’AdigeTrentoItaly Department of Food Quality and Nutrition Research and Innovation CentreFondazione Edmund Machvia Mach 138010 San Michele all’AdigeTrentoItaly Department of Biotechnology University of VeronaStrada le Grazie 1537134 VeronaItaly Center Agriculture Food Environment University of Trentovia Mach 138010 San Michele all’AdigeTrentoItaly

To elucidate the physiology underlying the development of superficial scald in pears,susceptible“Blanquilla”fruit was treated with different compounds that either promoted(ethylene)or repressed(1-methylcyclopropene and lovastatin)the incidence of this disorder after 4 months of cold storage.Our data show that scald was negligible for the fruit treated with 1-methylcyclopropene or lovastatin,but highly manifested in untreated(78%incidence)or ethylenetreated fruit(97%incidence).The comparison between the fruit metabolomic profile and transcriptome evidenced a distinct reprogramming associated with each treatment.In all treated samples,cold storage led to an activation of a cold-acclimation-resistance mechanism,including the biosynthesis of very-long-chain fatty acids,which was especially evident in 1-methylcyclopropane-treated fruit.Among the treatments applied,only 1-methylcyclopropene inhibited ethylene production,hence supporting the involvement of this hormone in the development of scald.However,a common repression effect on the PPO gene combined with higher sorbitol content was found for both lovastatin and 1-methylcyclopropene-treated samples,suggesting also a non-ethylene-mediated process preventing the development of this disorder.The results presented in this work represent a step forward to better understand the physiological mechanisms governing the etiology of superficial scald in pears.

关键词： superficial impaired hence

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