Molecular mechanisms behind the accumulation of ATP and H_(2)O_(2) in citrus plants in response to‘Candidatus Liberibacter asiaticus’infection
作者机构：USDA-ARSUS Horticultural Research Laboratory2001 S.Rock RoadFort Pierce34945FLUSA
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2017年第4卷第1期
页 面：163-170页
核心收录：
学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 071001[理学-植物学] 1001[医学-基础医学(可授医学、理学学位)] 07[理学] 0901[农学-作物学] 0703[理学-化学] 0836[工学-生物工程] 0902[农学-园艺学] 0834[工学-风景园林学（可授工学、农学学位）]
主 题：citrus mechanisms infection
摘 要：Candidatus Liberibacter asiaticus(Las)is a fastidious,phloem-restricted pathogen with a significantly reduced genome,and attacks all citrus species with no immune cultivars documented to *** other plant bacterial pathogens,Las deploys effector proteins into the organelles of plant cells,such as mitochondria and chloroplasts to manipulate host immunity and *** organelles are responsible for the synthesis of adenosine triphosphate(ATP)and have a critical role in plant immune signaling during hydrogen peroxide(H2O2)*** this study,we investigated H2O2 and ATP accumulation in relation to citrus huanglongbing(HLB)in addition to revealing the expression profiles of genes critical for the production and detoxification of H2O2 and ATP *** also found that as ATP and H2O2 concentrations increased in the leaf,so did the severity of the HLB symptoms,a trend that remained consistent among the four different citrus varieties ***,the upregulation of ATP synthase,a key enzyme for energy conversion,may contribute to the accumulation of ATP in infected tissues,whereas downregulation of the H2O2 detoxification system may cause oxidative damage to plant macromolecules and cell *** may explain the cause of some of the HLB symptoms such as chlorosis or leaf *** findings in this study highlight important molecular and physiological mechanisms involved in the host plants’response to Las infection and provide new targets for interrupting the disease cycle.
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