Počet záznamů: 1

Abscisic acid, gibberellins and brassinosteroids in Kelpak (R), a commercial seaweed extract made from Ecklonia maxima

SYSNO ASEP	0429988
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Abscisic acid, gibberellins and brassinosteroids in Kelpak (R), a commercial seaweed extract made from Ecklonia maxima
Tvůrce(i)	Stirk, W. A. (ZA) Tarkowská, Danuše (UEB-Q)_{RID, ORCID} Turečková, Veronika (UEB-Q)_{RID, ORCID} Strnad, Miroslav (UEB-Q)_{RID, ORCID} van Staden, J. (ZA)
Zdroj.dok.	Journal of Applied Phycology. - : Springer - ISSN 0921-8971 Roč. 26, č. 1 (2014), s. 561-567
Poč.str.	7 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	Abscisic acid ; Agricultural biostimulant ; Brassinosteroids
Vědní obor RIV	EF - Botanika
CEP	LK21306 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	GA206/09/1284 GA ČR - Grantová agentura ČR
	LO1204 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UEB-Q - RVO:61389030
UT WOS	000330969800059
DOI	10.1007/s10811-013-0062-z
Anotace	The seaweed extract Kelpak(A (R)) made from the kelp Ecklonia maxima is registered as a biostimulant for use in agriculture. It elicits many beneficial responses including improved root and shoot growth, higher yields and greater resistance to abiotic and biotic stresses. Previously, cytokinins, auxins and polyamines were identified in Kelpak(A (R)). The aim of the present study was to quantify other groups of plant growth regulators (PGRs)-abscisic acid (ABA), gibberellins (GAs) and brassinosteroids-that may be present in E. maxima and Kelpak(A (R)). Kelpak(A (R)) samples harvested between 2008 and 2010 and stored for up to 26 months were analysed using ultra performance liquid chromatography tandem mass spectrometry. ABA levels were below the limits of detection in E. maxima but were detected in low concentrations in Kelpak(A (R)), ranging from 0.31 to 20.70 pg mL(-1) Kelpak(A (R)). Eighteen GAs were found in E. maxima and Kelpak(A (R)) with concentrations from 187.54 to 565.96 pg mL(-1) Kelpak(A (R)). The biologically active GAs (GA(1), GA(3), GA(4), GA(5), GA(6) and GA(7)) comprised less than 3 % in Kelpak(A (R)). Although GA(13) (a final product in the metabolic pathway) was present in low concentrations in E. maxima, very high concentrations were present in Kelpak(A (R)). The brassinosteroids brassinolide (BL) and castasterone (CS) were identified in E. maxima and Kelpak(A (R)). Concentrations varied with harvest and storage time, ranging from 384.72 to 793.23 pg BL mL(-1) Kelpak(A (R)) and 62.84 to 567.51 pg CS mL(-1) Kelpak(A (R)). It is likely that this cocktail of natural PGRs present in Kelpak(A (R)) may act individually or in concert and thus contribute to the numerous favourable physiological responses elicited by Kelpak(A (R)) application to plants.
Pracoviště	Ústav experimentální botaniky
Kontakt	David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
Rok sběru	2015

Počet záznamů: 1