ArticleBMC plant biology2025
Comparative physiological and cytological analysis, and omics approach provide clues to the coloring mechanism of the pumpkin yellow stems.
Article in BMC plant biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Telomere-to-telomere genome assembly of pumpkin (Horticulture research · 2026Article
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Authors and funding
10 authors.
Funding
Abstract
backgroundThe abnormal chloroplast and pigment accumulation could lead to plant yellowing. However, the plant tissue chlorisis is species-specific and could display various phenotypes due to the genetic and environmental impacts. The molecular mechanisms underlying the plant stem yellowing are less understood than the flower or leaf coloring mechanisms. Herein, the physiological, cytological, transcriptome analysis, along with genome-wide association study (GWAS) were integrated to illustrate the processes relevant to pumpkin stem coloring.
resultsSimilar yet different variations were discovered in the pumpkin yellow stems. Low content of photosynthetic pigments, and impaired chloroplast thylakoid membrane were identified in the pumpkin yellowing stems, together with the presence of plastoglobules and starch grains. Elevated expression of genes in catabolism of chlorophylls and carotenoids was found in yellow stems, which may result in the failed accumulation of pigments and pumpkin stem chlorisis. Concurrently, increased expression of genes in chloroplast development, antioxidant protection, photosynthesis, and ribosome were found, which may act as compensation mechanisms for chloroplast defects. The integrated analysis of transcriptome and GWAS identified the up-regulated proteases and decreased kinesins in yellow stems, which could result in the breakdown of thylakoid systems, and the disability of photosynthetic pigments accumulation. Additionally, transcription factors could be involved in the regulation of the specific color change in pumpkin stems.
conclusionsThese findings provide clues into the molecular mechanisms of stem yellowing, and will facilitate the exploration of candidate targets as markers or genetic improvement through molecular breeding.
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