Resistance of Populus Davidiana × P. Bolleana Overexpressing Cinnamoyl-CoA Reductase Gene to Lymantria Dispar Larvae

Overview

Journal Transgenic Res

Date 2025 Jan 9

PMID 39786661

Authors

Ye Li

Ruiqiong Zhang

Lili Sun

Chuanwang Cao

Affiliations

Soon will be listed here.

Abstract

Lignin is a crucial defense phytochemical against phytophagous insects. Cinnamoyl-CoA reductase (CCR) is a key enzyme in lignin biosynthesis. In this study, transgenic Populus davidiana × P. bolleana overexpressing the PdbCCR gene were generated via Agrobacterium-mediated transformation. Successful integration of PdbCCR into the poplar genome was confirmed by PCR amplification and quantitative reverse transcription PCR (qRT-PCR). The lignin content in the transgenic poplar leaves was significantly higher than that in the wild poplar, and after L. dispar larvae fed on the transgenic poplar, the CCR activity was clearly induced. The L. dispar larvae grew slowly after feeding on transgenic poplar and the laccase, cellulase and three detoxifying enzymes were induced compared with larvae after feeding on wild-type poplar. The bioassay further revealed that transgenic poplar plants overexpressing PdbCCR showed a high level of resistance to L. dispar larvae. These results confirmed that PdbCCR is a candidate gene for breeding insect resistant poplar.

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