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Lee Kyeong Hyun,Lee Kang-Lok,남기정,Yang Jung-Wook,이증주,Shim Donghwan,김윤희 한국식물생명공학회 2022 Plant biotechnology reports Vol.16 No.4
Sweetpotato (Ipomoea batatas L.) is a globally important food crop that is susceptible to infestation with the root-knot nema- tode, Meloidogyne incognita, which causes substantial crop losses. Previous transcriptomic analysis of the roots of susceptible and resistant sweetpotato cultivars identified genes that are likely to contribute to protection against root-knot nematode. The identified genes included cinnamyl alcohol dehydrogenase (CAD), which are related to monolignol biosynthesis in plants. In this study, the role of CAD genes in sweetpotato defense responses to root-knot nematode infection was examined in susceptible and resistant cultivars. Comparison with Arabidopsis thaliana CAD genes identified groups of sweetpotato genes orthologous to AtCAD1–AtCAD9. Genes of the two major sweetpotato CAD groups contained the highest number of unigenes that were highly responsive to nematode infection in sweetpotato roots. These results indicate that CAD genes play roles in protecting sweetpotato roots against root-knot nematode infection.