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Integrative Targeted Metabolomics and Transcriptomics Reveal the Mechanism of Leaf Coloration in Impatiens hawkeri 'Sakimp005'.

Authors :
He, Jia-Qi
Yu, Dou-Cheng
Ren, Si-Yu
Zhang, Xiao-Li
Li, Xin-Yi
Huang, Mei-Juan
Huang, Hai-Quan
Source :
International Journal of Molecular Sciences; Jan2025, Vol. 26 Issue 1, p174, 21p
Publication Year :
2025

Abstract

One of the most important characteristics of ornamental plants is leaf color, which enhances the color of plant landscapes and attracts pollinators for reproduction. The leaves of Impatiens hawkeri 'Sakimp005' are initially green, then the middle part appears yellow, then gradually become white, while the edge remains green. In the study, leaves of I. hawkeri 'Sakimp005', in four developmental stages (S1-G, S2-C, S3-C, and S4-C), were selected for the determination of pigment content, chromaticity values, integrative metabolomics, and transcriptomics analyses. The carotenoid content of leaves varied significantly and regularly at four stages, and the colorimetric values corroborated the phenotypic observations. The results of integrative metabolomics and transcriptomics analysis show that the accumulation of two carotenoids (lutein and zeaxanthin), to different degrees in the leaves of I. hawkeri 'Sakimp005' at four stages, led to the vary yellowing phenomenon. We speculated that the carotenoid biosynthesis (containing two branches: α-branch and β-branch) in leaves by IhLUT1 and IhLUT5 in the α-branch and IhBCH2 genes in the β-branch differed. These findings provide a molecular basis for Impatiens plants' leaf color breeding and improve the knowledge of the leaf color mechanism. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16616596
Volume :
26
Issue :
1
Database :
Complementary Index
Journal :
International Journal of Molecular Sciences
Publication Type :
Academic Journal
Accession number :
182451277
Full Text :
https://doi.org/10.3390/ijms26010174