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J Agric Food Chem

Title:		Comparative Leaf Volatile Profiles of Two Contrasting Mandarin Cultivars against Candidatus Liberibacter asiaticus Infection Illustrate Huanglongbing Tolerance Mechanisms
Author(s):		Deng H; Zhang Y; Reuss L; Suh JH; Yu Q; Liang G; Wang Y; Gmitter FG;
Address:		"College of Horticulture, Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China. Citrus Research and Education Center, Horticultural Science, University of Florida, Lake Alfred, Florida 33850, United States. College of Horticulture and Landscape Architecture, Horticultural Science, Southwest University, Chongqing 400715, China. Citrus Research and Education Center, Food Science and Human Nutrition, University of Florida, Lake Alfred, Florida 33850, United States"
Journal Title:		J Agric Food Chem
Year:		2021
Volume:		20210909
Issue:		37
Page Number:		10869 - 10884
DOI:		10.1021/acs.jafc.1c02875
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Huanglongbing (HLB), presumably caused by Candidatus Liberibacter asiaticus (CaLas), is a devastating citrus disease worldwide. While all citrus are affected by HLB, some cultivars display greater tolerance; however, the underlying mechanisms are not fully understood. Here, volatile changes in HLB-tolerant LB8-9 Sugar Belle (SB) and HLB-sensitive Murcott mandarins after CaLas infection were comprehensively compared to determine if specific volatiles are associated with HLB responses and to discern the underlying tolerance mechanisms. These cultivars emitted qualitatively and quantitatively different volatiles in response to HLB induced by artificial graft or natural psyllid inoculation. Increasing amounts of total volatiles and de novo-synthesized new volatiles were two key responses to HLB of both cultivars. Markers potentially associated with HLB and host susceptibility were identified. Terpenoid biosynthetic pathway, green leaf volatile, and thymol metabolic pathways responsive to CaLas infection were dramatically altered. SB mandarin allows simultaneous defense and growth, contributing to its greater HLB tolerance"
Keywords:		Animals *Citrus *Hemiptera Liberibacter Plant Diseases Plant Leaves *Rhizobiaceae Murcott Sugar Belle defense response mandarin metabolic pathways plant growth volatile organic compound;
Notes:		"MedlineDeng, Honghong Zhang, Yi Reuss, Laura Suh, Joon Hyuk Yu, Qibin Liang, Guolu Wang, Yu Gmitter, Fred G Jr eng 2021/09/10 J Agric Food Chem. 2021 Sep 22; 69(37):10869-10884. doi: 10.1021/acs.jafc.1c02875. Epub 2021 Sep 9"