graminicola is an obligate sedentary endoparasite that is widely distributed in South East Asia and other countries where rice is extensively cultivated (Mg distribution map: ) 2, 8. graminicola) is the most prevalent root-knot nematode in rice cultivation systems and is a major threat to rice production, particularly in Asia, where ~90% of the world’s rice is produced and consumed 5, 6, 7.
Among them, root-knot nematodes ( Meloidogyne spp.), one of the top 10 economically important plant-parasitic nematodes, have a remarkably wide host range and cause the most damage 4. Over 100 different nematode species attack rice 3. Plant-parasitic nematodes cause 10–25% annual yield losses in rice worldwide 2. Rice ( Oryza sativa L.) is a major staple crop, providing food for more than half of the world’s population 1. Our findings provide insight into the molecular basis of nematode resistance as well as valuable resources for developing rice varieties with improved nematode resistance. Furthermore, we identified a putative protease inhibitor that directly interacts with MG1 during MG1-mediated resistance. We also report transcriptome and cytological changes that are correlated with a rapid and robust response during the incompatible interaction that occurs in resistant rice upon nematode invasion. Introgressing MG1 into susceptible varieties increases resistance comparable to resistant varieties, for which the leucine-rich repeat domain is critical for recognizing root-knot nematode invasion. GRAMINICOLA-RESISTANCE GENE 1 ( MG1), an R gene highly expressed at the site of nematode invasion, determines resistance against the nematode in several rice varieties. The rice root-knot nematode ( Meloidogyne graminicola) is one of the most destructive pests threatening rice ( Oryza sativa L.) production in Asia however, no rice resistance genes have been cloned.
0 kommentar(er)
