Agriculture Reference
In-Depth Information
Precursors of lipids
Carriers
ATPases (energy)
Fatty acid synthesis
in plastid
Protein transport
Proteins (PAP, CAP, Fib)
m
Polar lipids
CHX-B
CYC-B
ZDS
ζ
-Carotene
Zeaxanthin
and
lutein
Fibrils
-Carotene
β
STROMA
Lycopene
GGPS
PDS
PHY
CYTOSOL
oten
ZDS
CIS
CHX-B
CYC-B
Fig. 3.3. Representation of a fully differentiated chromoplast acting as a metabolic sink with the
accumulation of carotenoid-bearing structures. The following elements contribute to the metabolic sink:
stimulation of carotenoid biosynthesis in the membrane, emergence of vesicles from the inner membrane
that generate carotenoid-bearing bodies, import of proteins and lipid precursors that participate in the
sequestration of carotenoids, active energy provision through ATPases, stimulation of the development of
stromules, and accumulation of quinones, carotenoids and lipid material in plastoglobules. PAP, plastid
lipid-associated protein; CAP, carotenoid-associated protein; Fib, fi brillin; see Plate 1 for abbreviations for
the enzymes of the carotenoid biosynthesis pathway.
Acknowledgement
towards the discovery of the intimate
molecular and signalling mechanisms
involved in chromoplast differentiation
and their participation in the fruit
ripening process.
The personal work presented in this
chapter was supported by the 'Laboratoire
d'Excellence' (ANR-10-LABX-41).
References
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accumulation. Journal of Experimental Botany 60, 1783-1797.
Andersson, M.X. and Dörmann, P. (2009) Chloroplast membrane lipid biosynthesis and transport. In:
Sandelius, A.S. and Aronsson, H. (eds) The Chloroplast. Interactions with the Environment.
Springer-Verlag, Berlin/Heidelberg, pp. 125-158.
Andersson, M.X. and Sandelius, A.S. (2004) A chloroplast-localized vesicular transport system: a
bio-informatics approach. BMC Genomics 5, 40.
Angaman, D.M., Petrizzo, R., Hernadez-Gras, F., Romero-Segura, C., Pateraki, I., Busquets, M. and
Boronat, A. (2012) Precursor uptake assays and metabolic analyses in isolated tomato fruit
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Aoki, K., Yamamoto, M. and Wada, K. (1998) Photosynthetic and heterotrophic ferredoxin
isoproteins are colocalized in fruit plastids of tomato. Plant Physiology 118, 439-449.
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