THE ROLE OF AUXIN AND CYTOKININS IN PEA AXILLARY BUD GROWTH AFTER BREAKING OF APICAL DOMINANCE

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

THE ROLE OF AUXIN AND CYTOKININS IN PEA AXILLARY BUD GROWTH AFTER BREAKING OF APICAL DOMINANCE

Popis výsledku v původním jazyce

In buds from the 2nd primary scales of decapitated pea plants the increase of the IAA level already 2 hrs and increase of cytokinin (CK) levels 6 hrs after decapitation was recorded. It is well known that auxin is the main factor of cell expansion and cytokinins are activators of cell division. The beginning of bud growth was recorded 2 hrs after their release from apical dominance, and was accompanied with cell elongation, whereas cell division begins after 6 hrs and reaches the maximum after about 18hrs (Devitt, Stafstrom, 1995). Generally, the roots are considered the source of cytokinins, but it has been speculated that the CKs could be synthesised also in the buds. Therefore, isolated pea buds cultivated on MS medium without growth regulators were used. Similarly as in decapitated plants, transient IAA peak at 2 hrs and then an increase of cytokinins in buds was observed. Thereby, de novo biosynthesis of cytokinins in the isolated buds was proven.

Název v anglickém jazyce

THE ROLE OF AUXIN AND CYTOKININS IN PEA AXILLARY BUD GROWTH AFTER BREAKING OF APICAL DOMINANCE

Popis výsledku anglicky

In buds from the 2nd primary scales of decapitated pea plants the increase of the IAA level already 2 hrs and increase of cytokinin (CK) levels 6 hrs after decapitation was recorded. It is well known that auxin is the main factor of cell expansion and cytokinins are activators of cell division. The beginning of bud growth was recorded 2 hrs after their release from apical dominance, and was accompanied with cell elongation, whereas cell division begins after 6 hrs and reaches the maximum after about 18hrs (Devitt, Stafstrom, 1995). Generally, the roots are considered the source of cytokinins, but it has been speculated that the CKs could be synthesised also in the buds. Therefore, isolated pea buds cultivated on MS medium without growth regulators were used. Similarly as in decapitated plants, transient IAA peak at 2 hrs and then an increase of cytokinins in buds was observed. Thereby, de novo biosynthesis of cytokinins in the isolated buds was proven.

Druh

D - Stať ve sborníku

CEP obor

GC - Pěstování rostlin, osevní postupy

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2001

Kód důvěrnosti údajů

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

Název statě ve sborníku

17th International Conference on Plant Growth Substances

ISBN

80-7157-518-6

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

78-78

Název nakladatele

Neuveden

Místo vydání

Brno, Czech Republic

Místo konání akce

Brno, Czech Republic

Datum konání akce

1. 7. 2001

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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