hca: an Arabidopsis mutant exhibiting unusual cambial activity and altered vascular patterning

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F05%3A00002224" target="_blank" >RIV/61989592:15310/05:00002224 - isvavai.cz</a>

Alternative codes found

RIV/61389030:_____/05:00030704

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

hca: an Arabidopsis mutant exhibiting unusual cambial activity and altered vascular patterning

Original language description

By screening a T-DNA population of Arabidopsis mutants for alterations in inflorescence stem vasculature, we have isolated a mutant with a dramatic increase in vascular tissue development, characterized by a continuous ring of xylem/phloem. This phenotype is the consequence of premature and numerous cambial cell divisions in both the fascicular and interfascicular regions that result in the loss of the alternate vascular bundle/fiber organization typically observed in Arabidopsis stems. The mutant was therefore designated high cambial activity (hca). The hca mutation also resulted in pleiotropic effects including stunting and a delay in developmental events such as flowering and senescence. The physiological characterization of hca seedlings in vitro revealed an altered auxin and cytokinin response and, most strikingly, an enhanced sensitivity to cytokinin. These results were substantiated by comparative microarray analysis between hca and wild-type plants. The genetic analysis of hca

Czech name

hca: mutant Arabidopsis vykazující neobvyklou aktivitu kambia a pozměněný vsakulární obraz

Czech description

Screeningem populace T-DNA mutantů Arabisopsis pro odlišnosti ve vaskulatuře stonku byl identifikován mutant hca (high cambial activity). Důsledkem intenzivního buněčného dělení v kambiu je vznik continuální prstence floém/xylém. Fyziologická charakterizace semenáčků mutantu hca odhalila neobvyklou odezvu na auxin a cytokinin, zejména pak zvýšenou citlivost vůči cytokininu. Navrhujeme hypotézu, že hca je součástí mechanismu, který reguluje vývoj vaskulatury prostřednictvím změny citlivosti buněk kambiavůči auxinu a cytokininu. Mutant hca se jeví jako vhodný model pro studium genetické a hormonální kontroly růstu kambia a jeho diferenciace.

Type

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

CEP classification

CE - Biochemistry

OECD FORD branch

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Project

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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

Plant Journal

ISSN

0960-7412

e-ISSN

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Volume of the periodical

44

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

19

Pages from-to

271-289

UT code for WoS article

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EID of the result in the Scopus database

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