Antioxidant protection during ageing and senescence in chloroplasts of tobacco with modulated life span

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F08%3A00325898" target="_blank" >RIV/61389030:_____/08:00325898 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Antioxidant protection during ageing and senescence in chloroplasts of tobacco with modulated life span

Original language description

We studied changes in antioxidant protection during ageing and senescence in chloroplasts of tobacco (Nicotiana tabacum L., cv. Wisconsin) with introduced SAG(12) promoter fused with ipt gene for cytokinin synthesis (transgenic plants with increased levels of cytokinins, SAG) or without it (control). Old leaves of SAG plants as well as their chloroplasts maintained higher physiological parameters compared to controls; accordingly, we concluded that their ageing was diverted due to increased cytokinin content. The chloroplast antioxidant protection did not decrease as well. Although antioxidant protection usually decreased in whole leaves of senescing control plants, ascorbate peroxidase (APX) and dehydroascorbate reductase (DHAR) activity, which maintained the high redox state of ascorbate, increased in chloroplasts of old control leaves.

Czech name

Změny v antioxidační ochraně během stárnutí a senescence v chloroplastech transgenního tabáku

Czech description

Studovali jsme změny v antioxidační ochraně během stárnutí a senescence v chloroplastech transgenního tabáku s vneseným ipt genem pro syntézu cytokininů a v jejich kontrolách. Staré listy transgenních rostlin stejně tak jako jejich chloroplasty vykazovaly lepší fyziologické parametry v porovnání s kontrolními rostlinami. Antioxidační ochrana v transgenních rostlinách s věkem neklesala. Ačkoli však antioxidační ochrana poklesla ve starých listech kontrolních rostlin, askorbát peroxidáza a dehydroaskorbátreduktáza v jejich chloroplastech překvapivě vzrostla.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

ED - Physiology

OECD FORD branch

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Project

<a href="/en/project/GP522%2F05%2FP558" target="_blank" >GP522/05/P558: The antioxidative protection in chloroplasts and senescence initiation in tobacco plants</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Cell Biochemistry and Function

ISSN

0263-6484

e-ISSN

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Volume of the periodical

26

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

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UT code for WoS article

000258056900007

EID of the result in the Scopus database

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