摘要:通过对茶叶进行单一菌种和混合菌种的人工接种发酵,采用微波辅助浸提茶多
酚,来研究茶叶发酵过程中多酚的变化规律及不同菌株发酵产物的抗氧化活性。结果表明,
茶叶在发酵过程中多酚的含量随发酵时间的延长而降低,其中接种黑曲霉、酵母菌及接种黑
曲霉、酵母菌、根曲霉、青霉的茶叶中多酚含量变化趋势明显,分别从31.16%降到5.
32%,31.16%降到7.35%;不同菌种发酵产物的抗氧化能力存在差别,提取
物的抗氧化能力随时间延长呈现先增后减的变化趋势。
关键词:茶叶发酵;菌种;多酚;抗氧化
中图分类号:S571.1文献标识码:A文章编号:
0439-8 114(20 11)15-
3144-04
Stud
y on Variation Features and Antioxida
nt
Activity of Polyphenol in Tea Fermentatio
n
Process
ZHANG
Tian-ying1,2,ZHI Chun-xiang2,ZHAN
G
Hao1,CHEN Hui-juan1,SHAN Shu-lin1,MO Hai
-zhen1
(1.
Henan Institute of Science and Technol
ogy,Xinxiang
453000, Henan,China;
2.
Henan Shangshui Animal Husbandry Burea
u,
Shangshui 466100, Henan,China)
Abstract:
Tea was inoculated fermentated
with
a single strain and mixed st r ains. Accor
ding
to microwave assisted extraction of tea
polyphenols,
the variation of polyphenol an
d
antioxidant activity of extracts were studie
d
during the fermentation process of tea. Th
e
results indicated that: the content of the
tea
polyphenols in the fermentation process
decreased
with the prolonging of the fermentation
time,especially
the polyphenol of the tea in
oculated
Aspergillus niger and yeast and ino
culated
Aspergillus niger, yeast, root Aspe
rgillus
and Penicillium varied obviously. T
hey
reduced from 31.16% to 5.32%, from 31.16
%
to 7.35%; the product of fermentation of di
fferent
strains differed in antioxidant cap
acity
in the fermentation process, antioxid
ant
activity of the tea extracts increase d an
d
then decrease d with the time prolonged.
Key
words: tea fermentation; strains; polyp
henol;
antioxidant activity
普洱茶具有一定的保健作用,其抗氧化作用被认为是其保健功能最重要的机理。目前国