過氧化氫與脫落酸所加速水稻葉片老化間關係之研究
Date Issued
2005-07-31
Date
2005-07-31
Author(s)
高景輝
DOI
932313B002062
Abstract
The role of H2O2 in abscisic acid (ABA)-
induced rice leaf senescence is investigated.
ABA treatment resulted in H2O2 production in
rice leaves, which preceded the occurrence of
leaf senescence. Dimethylthiourea, a chemical
trap for H2O2, was observed to be effective in
inhibiting ABA-induced senescence, ABAinduced
malondialdehyde (MDA) content,
ABA-induced antioxidantive enzyme
activities (superoxide dismutase, ascorbate
peroxidase, glutathione reductase and
catalase), and ABA-induced antioxidant
content (ascorbic acid and reduced glutathione)
in rice leaves. Diphenyleneiodonium chloride
(DPI) and imidazole (IMD) [inhibitors of
NADPH oxidase], and KCN and NaN3
[inhibitors of peroxidase] prevented ABApromoted
senescence, ABA-increased MDA
contents, ABA-increased antioxidative
enzyme activities, and ABA-decreased
antioxidant contents in rice leaves. These
results suggest that H2O2 is involved in
ABA-induced senescence of rice leaves.
Subjects
Abscisic acid
Hydrogen peroxide
Leaf senescence
Rice
Publisher
臺北市：國立臺灣大學農藝學系暨研究所
Type
report
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