Metylester kyseliny jasmonové snižuje hladiny endogenních cytokininů v dělohách klíčních rostlin Cucurbota pepo (cuketa)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F04%3A00107465" target="_blank" >RIV/61389030:_____/04:00107465 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Methyl jasmonate down-regulates endogenous cytokinin levels in cotyledons of Cucurbita pepo (zucchini) seedlings

Popis výsledku v původním jazyce

Endogenous cytokinins (CK) were measured in Cucurbita pepo L. (zucchini) cotyledons after spraying 7-day-old seedlings with methyl jasmonate (MeJA) to examine whether the senescence-promoting action of MeJA is associated with changes in metabolic regulation of CK levels. MeJA promoted senescence as estimated by the loss of chlorophyll and injury to chloroplast ultrastructure. This was already detected one day after treatment. The contents of physiologically active CKs determined by high-performance liquid chromatography-mass spectrometry (CK bases: trans-zeatin, dihydrozeatin and isopentenyladenine and their ribosides), especially trans-zeatin and its riboside declined considerably. CK nucleotides and physiologically inactive CK 7- and 9-glucosides were also markedly decreased whereas the content of storage CK O-glucosides as well as cis-isomers of zeatin declined only slightly. Chlorophyll content and the normal chloroplast structure recovered 5 days after the MeJa treatment. The p...

Název v anglickém jazyce

Methyl jasmonate down-regulates endogenous cytokinin levels in cotyledons of Cucurbita pepo (zucchini) seedlings

Popis výsledku anglicky

Endogenous cytokinins (CK) were measured in Cucurbita pepo L. (zucchini) cotyledons after spraying 7-day-old seedlings with methyl jasmonate (MeJA) to examine whether the senescence-promoting action of MeJA is associated with changes in metabolic regulation of CK levels. MeJA promoted senescence as estimated by the loss of chlorophyll and injury to chloroplast ultrastructure. This was already detected one day after treatment. The contents of physiologically active CKs determined by high-performance liquid chromatography-mass spectrometry (CK bases: trans-zeatin, dihydrozeatin and isopentenyladenine and their ribosides), especially trans-zeatin and its riboside declined considerably. CK nucleotides and physiologically inactive CK 7- and 9-glucosides were also markedly decreased whereas the content of storage CK O-glucosides as well as cis-isomers of zeatin declined only slightly. Chlorophyll content and the normal chloroplast structure recovered 5 days after the MeJa treatment. The p...

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GD - Hnojení, závlahy, zpracování půdy

OECD FORD obor

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Projekt

<a href="/cs/project/GA522%2F02%2F0530" target="_blank" >GA522/02/0530: Hormonální regulace senescence listů a její vztah k využití dusíku u obilnin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Physiologia Plantarum

ISSN

0031-9317

e-ISSN

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Svazek periodika

122

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DK - Dánské království

Počet stran výsledku

8

Strana od-do

496-503

Kód UT WoS článku

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EID výsledku v databázi Scopus

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