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Titolo:
Increment of antioxidase activity of transgenic tobacco with betaine aldehyde dehydrogenase
Autore:
Luo, AL; Liu, JY; Ma, DQ; Wang, WC; Liang, Z;
Indirizzi:
Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Beijing 100093, Peoples R China Chinese Acad Sci Beijing Peoples R China 100093 100093, Peoples R China Chinese Acad Sci, Inst Microbiol, Beijing 100080, Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 100080, Peoples R China Chinese Agr Univ, Beijing 100094, Peoples R China Chinese Agr Univ Beijing Peoples R China 100094 100094, Peoples R China
Titolo Testata:
CHINESE SCIENCE BULLETIN
fascicolo: 6, volume: 46, anno: 2001,
pagine: 492 - 495
SICI:
1001-6538(200103)46:6<492:IOAAOT>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESISTANCE; GLYCINEBETAINE; LOCALIZATION; CHLOROPLASTS; PEROXISOMES; STRESS; RICE; GENE;
Keywords:
betaind aldehyde dehydrogenase gene; tobacco; antioxidative enzymes activities;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Luo, AL Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Beijing 100093, Peoples R China Chinese Acad Sci Beijing Peoples R China 100093 Peoples R China
Citazione:
A.L. Luo et al., "Increment of antioxidase activity of transgenic tobacco with betaine aldehyde dehydrogenase", CHIN SCI B, 46(6), 2001, pp. 492-495

Abstract

Superoxide dismutase (SOD) activity in the leaves of transgenic tobacco plants with betaine aldehyde dehydrogenase (BADH) gene was about 36% higher than that in the control plants (parent plants), activities of peroxidase (POD) and catalase (Cat) increased by about 62% and 88% respectively. Activities of ascorbate peroxidase (AsSPOD), dehydroascorbate redutase (DAsAR) andglutathione reductase (GR) in ascorbate-glutothion pathway located at chloroplasts increased by 67.7%, 47.9% and 38.8% respectively. These results indicated that the H2O2 produced by SOD catalyzing superoxide anion radicals (O-2(-)) could be fully decomposed, and could not derive to form the strongest toxicant radicals . OH. This is the first report to elucidate quantitatively that the activities of two kinds of antioxidative enzymes decomposed radicals and active oxygen were matched. Photoinhibition tolerant capacity of the transgenic tobacco plants was 35% higher than that in the parent plants. Increment of photoinhibition tolerant capacity in the transgenic tobacco plants might be due to increment of antioxidative enzymes activities, inturn being able to more effectively scavenge active oxygen and radicals, protect organization and function of chloroplasts. These results showed thatthe increment of antioxidative enzymes activities in the transgenic tobacco might be one of the reasons far the increment of resistance in the transgenic tobacco.

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Documento generato il 03/12/20 alle ore 23:28:53