What question did this study set out to answer?

To determine the cellular site of condensed tannin polymerization and its trafficking pathway to the vacuole across diverse vascular plants (Tracheophyta).

September 11, 2013Annals of BotanyOpen Access

The tannosome is an organelle forming condensed tannins in the chlorophyllous organs of Tracheophyta

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Authors

JBJean‐Marc BrillouetIngénierie des Agropolymères et Technologies Emergentes CRCharles RomieuCentre de Coopération Internationale en Recherche Agronomique pour le Développement BSBenoı̂t SchoefsCentre National de la Recherche Scientifique

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Implication

Microscopy and biochemical analyses reveal chloroplast-derived tannosomes in vascular plants, highlighting a conserved organelle pathway for defensive tannin storage.

Key Points

To determine the cellular site of condensed tannin polymerization and its trafficking pathway to the vacuole across diverse vascular plants (Tracheophyta).
Examined tannin-rich tissues from Cycadophyta, Ginkgophyta, Equisetophyta, Pteridophyta, Coniferophyta, and Magnoliophyta.
Employed transmission electron microscopy (TEM), epifluorescence, confocal microscopy, and immunocytochemistry against chloroplast envelope and thylakoid proteins alongside cell fractionation and chemical analysis.
Demonstrated that condensed tannins polymerize inside a novel chloroplast-derived organelle, termed the tannosome, which forms by the pearling of thylakoids into 30 nm spheres.
Identified that tannosomes are encapsulated in shuttles that bud from fused chloroplast envelopes, traffic across the cytoplasm, and invaginate the tonoplast to form storage accretions inside the vacuole across all studied Tracheophyta.

Cite This Study

Brillouet et al. (2013) studied this question.

synapsesocial.com/papers/6a829065040bdabcf346f3d3 https://doi.org/10.1093/aob/mct168

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Implication

Microscopy and biochemical analyses reveal chloroplast-derived tannosomes in vascular plants, highlighting a conserved organelle pathway for defensive tannin storage.

The tannosome is an organelle forming condensed tannins in the chlorophyllous organs of Tracheophyta

Discussion

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Implication

Key Points

Cite This Study

The tannosome is an organelle forming condensed tannins in the chlorophyllous organs of Tracheophyta

Discussion

Member takes

Implication

Key Points

Cite This Study

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