%0 Journal Article
%T Chlorophyll Degradation in Horticultural Crops
%A Samak KAEWSUKSAENG
%J Walailak Journal of Science and Technology
%D 2011
%I Walailak University
%R 10.2004/vol8iss1pp9-19
%X One of the symptoms of senescence in harvested horticultural crops is the loss of greenness that comes with the degradation of chlorophyll. With senescence, the chlorophyll-degrading enzyme activities such as chlorophyllase, Mg-dechelatase or Mg-dechelation activity, a new chlorophyll-degrading enzyme, pheophytinase, pheophorbidase and chlorophyll-degrading peroxidase, which are involved in chlorophyll degradation, affected greatly in stored horticultural crops. The chlorophyll derivatives, especially chlorophyllide, pheophytin, pheophorbide and C132-hydroxychlorophyll are accumulated as intermediates of chlorophyll degradation. In addition, chlorophyll degradation by the chlorophyll-degrading enzymes seems to occur in the thylakoid and envelope membrane of chloroplast and/ or the vacuole. The involvement of chlorophyll-degrading enzymes in senescing horticultural crops is also discussed.
%K Chlorophyll
%K chlorophyll degradation
%K chlorophyll-degrading enzymes
%K horticultural crop
%U http://wjst.wu.ac.th/index.php/wjst/article/view/7