Change in Xylanase Activity in Peel and Pulp of Banana (Musa sp.) Fruits during Ripening and Softening
Xylanase (1,4-6-D-xylan-xylanohydrolase, EC 3.2.1.8) is the name given to a class of enzymes which degrade the linear polysaccharide beta-1,4-xylan into xylose. Xylan is one of the most abundant polysaccharides existing in nature. It consists of a backbone of pl,4-linked d-xylose, usually with branches of a-1,3linked L-arabinose and α-1,2-linked D-glucopyranose. To find out whether xylanase plays important roles in banana fruit softening, the enzyme activities in peel end pulp, fruit firmness, respiration rate and ethylene release rate were assayed during banana softening. The results showed that xylanase activity increased suddenly synchronic to the appearance of the ethylene production peak at later stage, xylanase activity increased about 175 and 268 folds in peel and pulp in CK, 154 and 236 folds in peel and pulp in treatment, respectively, and activities in treatment were slightly lower than in control both in peel and pulp; while ethylene absorbent treatment postponed the reaching the peaks of xylanase activities, but did not change the pattern of it during storage, which means that its activity may be regulated by ethylene.
banana fruit ripening and softening xylanase
Li Xue-Ping Chen Wei-Xin Zhuang Jun-Ping
Laboratory for Postharvest Science and Technology of Fruits and Vegetables, College of Horticulture, State Key Lab of Pulp and Paper Engineering, South China University of Technology Guangzhou, 510642,
国际会议
海口
英文
131-134
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）