ArticleTransgenic research2026
Functional analysis of the role of a wound-induced leucine aminopeptidase gene homologue isolated from Rorippa indica in aphid herbivory.
Article in Transgenic research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Leucine aminopeptidases (LAPs) are multifunctional enzymes with roles in both defence and development. In plants, they are reported to be induced by wound-inflicting Lepidopteran insects and regulate wound response pathways leading to an effective defence response. Infestation by Hemipteran mustard aphid, Lipaphis erysimi (L.) Kaltenbach has been reported to induce wound response as well as a wound-responsive Arabidopsis thaliana Lap1 homologue (RI01; GenBank Accession: JK034053) in Rorippa indica (L.) Hiern. This is interesting as Hemipteran insects like aphids are assumed to inflict minimal wounding. In the present study, starting with the RI01 sequence information, we isolated the full length (1566 bp) sequence of a novel R. indica Lap (RiLap) gene, performed in silico analyses and developed transgenic R. indica plants with suppressed RiLAP activity by expressing a 565 bp antisense fragment of RiLap cDNA. We found that the isolated RiLAP is an acidic LAP of M17 family and suppressing it causes a significant increase in aphid herbivory but reduction in total chlorophyll content and possibly photosynthetic capacity in aphid infested transgenic plants of the T1 generation. These findings though preliminary suggest that RiLap could have a role in deterring aphids by acting as a regulatory protein simultaneously balancing defence response and photosynthetic capacity or plant growth. Noting the dearth of research in this area, this pilot study will be useful for designing future in depth analyses in understanding the role of Laps in defence response against Hemipteran insects. The study has implications in the development of sustainable pest management avenues.
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