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Titolo:
Differential resistance to methyl viologen in transgenic tobacco plants that express sweet potato peroxidases
Autore:
Yun, BW; Huh, GH; Lee, HS; Kwon, SY; Jo, JK; Kim, JS; Cho, KY; Kwak, SS;
Indirizzi:
Korea Res Inst Biosci & Biotechnol, Plant Biochem Res Unit, Taejon 305600,South Korea Korea Res Inst Biosci & Biotechnol Taejon South Korea 305600 South Korea Kyungpook Natl Univ, Dept Anim Sci, Taegu 702701, South Korea Kyungpook Natl Univ Taegu South Korea 702701 , Taegu 702701, South Korea Korea Res Inst Chem Technol, Agrochem Screening Team, Taejon 305600, SouthKorea Korea Res Inst Chem Technol Taejon South Korea 305600 305600, SouthKorea
Titolo Testata:
JOURNAL OF PLANT PHYSIOLOGY
fascicolo: 4, volume: 156, anno: 2000,
pagine: 504 - 509
SICI:
0176-1617(200004)156:4<504:DRTMVI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
MANGANESE SUPEROXIDE-DISMUTASE; OXIDATIVE STRESS TOLERANCE; ASCORBATE PEROXIDASE; GENE; PARAQUAT; PROTEIN; ENZYMES; CELLS;
Keywords:
Ipomoea batatas; Nicotiana tabacum; sweet potato; ion conductivity; methyl viologen; oxidative stress; peroxidase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Kwak, SS Korea Res Inst Biosci & Biotechnol, Plant Biochem Res Unit, POB 115, Taejon 305600, South Korea Korea Res Inst Biosci & Biotechnol POB 115 Taejon South Korea 305600
Citazione:
B.W. Yun et al., "Differential resistance to methyl viologen in transgenic tobacco plants that express sweet potato peroxidases", J PLANT PHY, 156(4), 2000, pp. 504-509

Abstract

To analyze the physiological role of each peroxidase (POD) isoenzyme in environmental stress adaptation, transgenic tobacco (Nicotiana tabacum) plants expressing either a sweet potato (Ipomoea batatas) anionic POD (swpa1) orneutral POD (swpn1) were tested for responses to oxidant methyl viologen (MV). Fully expanded leaves of both swpa1- and swpn1-transgenic plants had about two times higher POD activity than non transformed (NT) plants. When tobacco leaf discs were subjected to MV at 10 and 100 mu mol/L, swpa1-transgenic plants showed about a 25 % reduction in membrane damage relative to swpn1-transgenic or NT plants. Leaves of swpn1-transgenic and NT plants were bleached more than those of swpa1-transgenics by 1 mu mol/L MV treatment, whereas all plants were severely damaged at 3 mu mol/L MV. These results indicate that the increased H2O2-scavenging capacity provided by the swpa1 POD(a guaiacol-type POD) contributes to increased protection against MV-mediated oxidative damage. Furthermore, differences in response to oxidant treatments indicate unique functions for the two isoenzymes encoded by swpa1 andswpn1.

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Documento generato il 29/09/20 alle ore 17:07:23