FsHemF is involved in the formation of yellow Forsythia leaves by regulating chlorophyll synthesis in response to light intensity

Zhang, Xiaolu; Zhao, Zhengtian; Zhang, Man; Wang, Jia; Cheng, Tangren; Zhang, Qixiang

doi:10.1016/j.plaphy.2023.107746

Cited by 4 publications

(1 citation statement)

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“…The pathway of Chl synthesis involves a cascade of enzymatic reactions catalyzed by over twenty enzymes [16]. Examining Chl precursors helps identify potential impediments in the Chl synthesis pathway [62]. In the yl1 rice mutant, there was a significant increase in Proto IX content, while the levels of Mg-Proto IX and Pchlide were notably reduced compared to the WT.…”

Section: Discussionmentioning

confidence: 99%

Molecular Mechanisms of Chlorophyll Deficiency in Ilex × attenuata ‘Sunny Foster’ Mutant

Zou,

Huang,

Zhang

et al. 2024

Plants

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Ilex × attenuata ‘Sunny Foster’ represents a yellow leaf mutant originating from I. × attenuata ‘Foster#2’, a popular ornamental woody cultivar. However, the molecular mechanisms underlying this leaf color mutation remain unclear. Using a comprehensive approach encompassing cytological, physiological, and transcriptomic methodologies, notable distinctions were discerned between the mutant specimen and its wild type. The mutant phenotype displayed aberrant chloroplast morphology, diminished chlorophyll content, heightened carotenoid/chlorophyll ratios, and a decelerated rate of plant development. Transcriptome analysis identified differentially expressed genes (DEGs) related to chlorophyll metabolism, carotenoid biosynthesis and photosynthesis. The up-regulation of CHLD and CHLI subunits leads to decreased magnesium chelatase activity, while the up-regulation of COX10 increases heme biosynthesis—both impair chlorophyll synthesis. Conversely, the down-regulation of HEMD hindered chlorophyll synthesis, and the up-regulation of SGR enhanced chlorophyll degradation, resulting in reduced chlorophyll content. Additionally, genes linked to carotenoid biosynthesis, flavonoid metabolism, and photosynthesis were significantly down-regulated. We also identified 311 putative differentially expressed transcription factors, including bHLHs and GLKs. These findings shed light on the molecular mechanisms underlying leaf color mutation in I. × attenuata ‘Sunny Foster’ and provide a substantial gene reservoir for enhancing leaf color through breeding techniques.

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Section: Discussionmentioning

confidence: 99%