期刊
CARBOHYDRATE POLYMERS
卷 225, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115236
关键词
Solanum lycopersicum; Dextran; Immune response; Botrytis cinerea
资金
- National Natural Science Foundation of China [31701668]
- Natural Science Foundation of Tianjin City [17JCQNJC14300]
- Transformation of Agricultural Scientific and Technological Achievements of Tianjin City [201901270]
- Open Project Program of State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science Technology [SKLFNS-KF-201827]
Alpha-1,3-glucan is often synthesized on the surface of pathogenic filamentous fungi cell walls to block pathogen-associated molecular patterns (PAMPs) generation by host plant enzymes and the subsequent immune system response of the plant. Here, Botrytis cinerea susceptibility was assessed in tomato fruit to determine whether the fruit could recognize this camouflage and mount an immune response to it. The results showed that local mechanical wounds treated with dextran and laminarin, except amylopectin, could locally and then systemically activate disease resistance against B. cinerea infection in tomato fruit. Dextran treatment effectively elicited fruit callose deposition and phenylpropanoid and flavonoid biosynthesis to a greater extent than alpha-glucanase activity relative to the mock group surface wounds. Enzymatic hydrolysis of this polysaccharide provided some help in improving host disease resistance. Taken together, these results demonstrate that tomato fruit can perceive alpha-1,3-glucan as a kind of PAMPs but have limited ability to degrade it.
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