ArticleAnnals of botany2013
Gibberellin mediates the development of gelatinous fibres in the tension wood of inclined Acacia mangium seedlings.
Article in Annals of botany, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 17 citations in OpenAlex.
- Rhamnogalacturonan I with β-(1,4)-Galactan Side Chains as an Ever-Present Component of Tertiary Cell Wall of Plant Fibers.International journal of molecular sciences · 2023Article
- A combination of scanning electron microscopy and broad argon ion beam milling provides intact structure of secondary tissues in woody plants.Scientific reports · 2022Article
- A PtrLBD39-mediated transcriptional network regulates tension wood formation inPlant communications · 2022Article
- Early transcriptional response to gravistimulation in poplar without phototropic confounding factors.AoB PLANTS · 2021Article
- Stem gravitropism and tension wood formation in Acacia mangium seedlings inclined at various angles.Annals of botany · 2018Article
- Distribution of tension wood like gelatinous fibres in the roots of Acacia nilotica (Lam.) Willd.Planta · 2014Article
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8 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsGibberellin stimulates negative gravitropism and the formation of tension wood in tilted Acacia mangium seedlings, while inhibitors of gibberellin synthesis strongly inhibit the return to vertical growth and suppress the formation of tension wood. To characterize the role of gibberellin in tension wood formation and gravitropism, this study investigated the role of gibberellin in the development of gelatinous fibres and in the changes in anatomical characteristics of woody elements in Acacia mangium seedlings exposed to a gravitational stimulus.
methodsGibberellin, paclobutrazol and uniconazole-P were applied to the soil in which seedlings were growing, using distilled water as the control. Three days after the start of treatment, seedlings were inclined at 45 ° to the vertical and samples were harvested 2 months later. The effects of the treatments on wood fibres, vessel elements and ray parenchyma cells were analysed in tension wood in the upper part of inclined stems and in the opposite wood on the lower side of inclined stems. KEY
resultsApplication of paclobutrazol or uniconazole-P inhibited the increase in the thickness of gelatinous layers and prevented the elongation of gelatinous fibres in the tension wood of inclined stems. By contrast, gibberellin stimulated the elongation of these fibres. Application of gibberellin and inhibitors of gibberellin biosynthesis had only minor effects on the anatomical characteristics of vessel and ray parenchyma cells.
conclusionsThe results suggest that gibberellin is important for the development of gelatinous fibres in the tension wood of A. mangium seedlings and therefore in gravitropism.
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