Changes of cytokinin oxidase/dehydrogenase levels during senescence in cereals

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F05%3A00001820" target="_blank" >RIV/61989592:15310/05:00001820 - 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

Changes of cytokinin oxidase/dehydrogenase levels during senescence in cereals

Original language description

Senescence is the sequence of biochemical and physiological events comprising the final phase in development, which culminates in the cellular breakdown and death. Senescence initiation is programmed new gene expression caused naturally or induced by space competition, light, environmental stress and nutrition factors. It was proven that endogenously enhanced cytokinin contents in leaves leads to the delayed senescence. In cereals, the velocity of senescence of the flag leaf determines subsequent powerand quantity of assimilate transport to the ripening seeds. Hence, a triggered manipulation of cytokinin content via engineered regulation of CKX gene expression becomes a promising tool to alter yield attributes in cereals. High levels of cytokinins were found in chloroplasts extracted from green leaves. There is no evidence for any CKX isoforms to target to chloroplast up to present time. However, an enormous increase in the CKX level was detected in early stages of leaf senescence in

Czech name

Změny v hladině cytokininoxidasy/dehydrogenasy u obilovin během senescence

Czech description

Senescence je série biochemických a fyziologických událostí v závěrečné fázi vývoje rostlin. Bylo prokázáno, že zvýšený endogenní obsah cytokininů v listech vede k oddálení senescence. Cílená manipulace hladiny cytokininů např. pomocí regulace exprese genů cytokinindehydrogenasy (CKX) u obilovin může sloužit ke zvýšení výnosů. Vysoké koncentrace cytokininů byly nalezeny v chloroplastech ze zelených listů, ale doposud nebyla prokázána přítomnost cytokinindehydrogenasy v této organele. Byly sledovány změny v expresi všech známých genů CKX u pšenice a ječmene a diskutovány ve vztahu k subcelulární lokalizaci cytokininů.

Type

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

CEP classification

CE - Biochemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2005

Confidentiality

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

Name of the periodical

Biologia Plantarum

ISSN

0006-3134

e-ISSN

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Volume of the periodical

49

Issue of the periodical within the volume

S1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

1

Pages from-to

"S5"

UT code for WoS article

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EID of the result in the Scopus database

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