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Comparative Transcriptomic Analysis of the Interaction between Penicillium expansum and Apple Fruit (Malus pumila Mill.) during Early Stages of Infection

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School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
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School of Food Science and Engineering, Yangzhou University, Yangzhou 225009, China
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Chongqing Key Laboratory of Economic Plant Biotechnology, College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, China
*
Authors to whom correspondence should be addressed.
Microorganisms 2019, 7(11), 495; https://doi.org/10.3390/microorganisms7110495
Received: 8 October 2019 / Revised: 20 October 2019 / Accepted: 21 October 2019 / Published: 28 October 2019
(This article belongs to the Special Issue Interplay between Fungal Pathogens and Harvested Crops)
Blue mold, caused by Penicillium expansum, is an important postharvest disease of apple, and can result in significant economic losses. The present study investigated the interaction between P. expansum and wounded apple fruit tissues during the early stages of the infection. Spores of P. expansum became activated one hour post-inoculation (hpi), exhibited swelling at 3 hpi, and the germ tubes were found entering into apple tissues at 6 hpi. RNA-seq was performed on samples of P. expansum and apple fruit tissue collected at 1, 3, and 6 hpi. The main differentially expressed genes (DEGs) that were identified in P. expansum were related to interaction, cell wall degradation enzymes, anti-oxidative stress, pH regulation, and effectors. Apple tissues responded to the presence of P. expansum by activating pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) at 1 hpi, then activated effector-triggered immunity (ETI) at 3 hpi. This research provides new information on the interaction between P. expansum and apple fruit tissue at an early stage of the infection process. View Full-Text
Keywords: cell wall degradation enzymes; ETI; Penicillium expansum-Apple interaction; pH regulation; plant hormone signaling; PTI cell wall degradation enzymes; ETI; Penicillium expansum-Apple interaction; pH regulation; plant hormone signaling; PTI
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MDPI and ACS Style

Wang, K.; Zheng, X.; Zhang, X.; Zhao, L.; Yang, Q.; Boateng, N.A.S.; Ahima, J.; Liu, J.; Zhang, H. Comparative Transcriptomic Analysis of the Interaction between Penicillium expansum and Apple Fruit (Malus pumila Mill.) during Early Stages of Infection. Microorganisms 2019, 7, 495.

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