02141naa a2200289 a 450000100080000000500110000800800410001902200470006002400380010710000130014524501210015826000090027950000530028852011200034165000110146165300160147265300160148865300160150465300180152065300130153865300180155165300370156970000180160670000180162470000180164277301910166010604942020-06-01       2020    bl uuuu     u00u1 u    #d  a1064-3745 (print) / 1940-6029 (electronic)7 a10.1007/978-1-4939-9952-1_182DOI1 aLADO, J.  aVisualization of carotenoid-storage structures in fruits by transmission electron microscopy.h[electronic resource]  c2020  aArticle history: First Online: 20 November 2019.  aABSTRACT. Plastids are cell organelles that, beside other functions, have the capability to store carotenoids in specialized structures, which may vary among the different plant species, tissues or according to the carotenoid complement. Fruits are an important source of carotenoids, and during ripening, chloroplasts differentiate into chromoplasts that are able to accumulate large amounts of carotenoids, rendering then the characteristic fruit coloration. Whereas lycopene or β-carotene may accumulate as crystal in the chromoplasts of some fruit, other xanthophyll-accumulating fruits differentiate plastoglobuli as a preferred system to enhance carotenoids stability and storage. Visualization of plastid ultrastructure and their transformation during ripening or in fruit of contrasting coloration are fundamental objectives within carotenoids research in fruits. Therefore, in this chapter, we describe a protocol for the visualization and analysis of plastid ultrastructure by transmission electron microscopy (TEM), specially designed and adapted to fruit tissues. © Springer Science+Business Media  aCITRUS  aCAROTENOIDS  aChloroplast  aChromoplast  aCITRUS FRUITS  aPlastids  aPlastoglobuli  aTransmission electron microscopy1 aZACARÍAS, J.1 aRODRIGO, M.J.1 aZACARÍAS, L.  tIn: Rodríguez-Concepción M., Welsch R. (eds). Plant and Food Carotenoids. Methods in Molecular Biology, 2020, vol 2083. Pages 235-244. DOI: https://doi.org/10.1007/978-1-4939-9952-1_18