Characteristics and Molecular Mechanism of Slow Vegetative Growth in Hexaploid Transgenic Poplar 741 With an Insect-Resistance Gene.

ABSTRACT: Polyploid plants frequently exhibit altered vegetative growth, yet the molecular mechanisms remain unclear. This study reveals that hexaploidisation of triploid insect-resistant poplar 741-line Pb29 significantly reduces growth rate, leaf area, photosynthetic capacity and organic matter accumulation. Meanwhile, the degradation of auxin and gibberellic acid accelerated, the abscisic acid content increased, and insect resistance was diminished with the increase in ploidy. Comprehensive multiomics analysis elucidated the molecular mechanisms underlying the slow vegetative growth of hexaploids. Transcriptome analysis demonstrated reshaping of vegetative growth-associated networks, manifested as reduced photosynthetic capacity and increased energy consumption, which ultimately reduced the energ

SUBMITTER: Chen X 

PROVIDER: S-EPMC12483988 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature