Fig. 1From: Exploring the differential mechanisms of carotenoid biosynthesis in the yellow peel and red flesh of papayaPapaya coloration during papaya fruit ripening. a, The color of peel and flesh at the following stages of papaya fruit development: GS, Green stage (the peel is dark green and the flesh is white); CB, Color break stage (most of the peel are still green, but there are two yellow stripes appear on the top of fruit, as well as the flesh are red); HY, Half yellow stage (the color of peel is half green and half yellow); FY, Full yellow stage (the color of peel is full yellow). b, The chromoplasts and flesh cells in FY stage; the red arrow in the legend indicates the red elongated contours crystals. c, The chromoplasts and peel cells in FY stage; the red arrow in the legend indicates the yellow round-shaped elements. Small pieces of flesh and peel of FY stage papaya were cut with a sharp razor blade to very thin sections, and the thin sections were used to observe chromoplast with an Olympus IX51 (Tokyo, Japan)Back to article page