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mgr-mir-9 implicates Meloidogyne graminicola infection in rice by targeting the effector MgPDI

Journal of Integrative Agriculture 2023年第5期22卷 1445-1454页

作者： TIAN Zhong-ling ZHOU Jia-yan ZHENG Jing-wu HAN Shao-jie Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province Interdisciplinary Research Academy(IRA)Zhejiang Shuren UniversityHangzhou 310015P.R.China Laboratory of Plant Nematology Institute of BiotechnologyCollege of Agriculture&BiotechnologyZhejiang UniversityHangzhou 310058P.R.China Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests Zhejiang UniversityHangzhou 310058P.R.China

MicroRNAs (miRNAs),a class of small non-coding RNAs,are crucial endogenous gene regulators in a range of animals,including plant-parasitic *** graminicola is an obligate sedentary endoparasite of rice and causes significant yield losses.A number of studies focused on the roles of *** effectors during the parasitic process;however,how nematode miRNAs regulate its effectors needs *** this research,we analyzed a cluster of *** miRNAs obtained at the second-stage juveniles (J2s) stage that are closely linked to the regulation of *** *** are 49 767 105 total clean reads obtained from three libraries.A total of 233 known miRNAs and 21 novel miRNAs were *** the known miRNAs,mgr-lin-4,mgr-mir-1,mgr-mir-100,mgrmir-86,mgr-mir-279,mgr-mir-87,mgr-mir-71,mgr-mir-9,mgr-mir-50,mgr-mir-72,and mgr-mir-34 are the most abundant11 miRNAs ***,the expression levels of selected miRNAs were validated by real-time quantitative *** hypothesized that these miRNAs might regulate the expression of secreted effectors during the J2s stage to facilitate its *** with this,we found that mgr-mir-9 targets MgPDI,an important *** effector *** addition to that,J2s treated with mgr-mir-9 mimics showed down-regulation of MgPDI expression and reduced reproductive ability,alluding mgr-mir-9 is involved in nematode *** results provide novel insight into the regulatory functions of *** miRNAs during the infection and identify miRNAs and their effector targets as potential key management targets to limit parasite survival during the early stages of infection.

关键词： microRNA function Meloidogyne graminicola deep sequencing Dual-Luciferase Reporter Assay System proteindisulfideisomerase

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