@Article{taiwania199540183, AUTHOR = {Jen-Chieh Hsu, Yih-Kuang Lu and Chi-Ming Yang}, TITLE = {ANALYSIS ON PIGMENTS IN THE EXOCARP OF ORANGE FRUIT}, JOURNAL = {Taiwania}, VOLUME = {40}, YEAR = {1995}, ISSUE = {1}, PAGES = {83-90}, URL = {https://taiwania.ntu.edu.tw/abstract/875}, ABSTRACT = {We examined the chlorophyll (Chl) and carotenoid contents, and the three intermediates (protoporphyrin IX (PPIX), magnesium protoporphyrin IX (MGPP) and protochlorophyllide (Pchlide)) of Chl biosynthetic pathway in the exocarp of orange fruit during its late ripening stage. While Chl content declines by 12 folds, carotenoid content always remains similar level. meanwhile, the ratios of Chl a/b, carotenoid/Chl and Pchlide/Chl alter from 1.51 to 4.42 from 0.22 to 2.74 and from 1.00 to 0.07, respectively. It is, therefore, concluded: (a) the deficiency of carotenoid is not directly accompanied by the deficiency of Chl; (b) the degradation rate of Chl b is faster than that of Chl a; (c) the degradation rate of PPIX is slower than that of MGPP and Pchlide; and (d) as ripening takes place, the residual Pchlide is more easily forwarded to Chl.}, DOI = {10.6165/tai.1995.40.83} }