Chromoplast

A chromoplast is a plant organelle characterised by accumulating carotenoids, the pigments that confer yellow, orange and red colours to many flowers, fruits and roots. Besides their role in carotenoid synthesis, the chromoplast is a very active organelle involved in different biosynthetic processes during fruit ripening. According to the new study, chromoplasts are also able to produce chemical energy -- in other words, to synthetize molecules of adenosine triphosphate (ATP) -- by means of a respiratory process named chromorespiration.

Taken From : http://www.sciencedaily.com/releases/2014/11/141106082630.htm (Accessed 29th December ,2014)