Details

Title

Sucrose and Cytokinin Interactions in Relation to Ethylene and Abscisic Acid Production in the Regulation of Morphogenesis in Pelargonium × hortorum L.H. Bailey In Vitro

Journal title

Acta Biologica Cracoviensia s. Botanica

Yearbook

2015

Numer

No 1

Publication authors

Divisions of PAS

Nauki Biologiczne i Rolnicze

Abstract

Abstract The aim of the study was to determine the effect of exogenous sucrose and cytokinin on ethylene production and responsiveness in relation to the shoot formation of Pelargonium × hortorum ‘Bergpalais’ in vitro. Increasing the concentration of sucrose from 15 to 40 g L−1 in medium containing meta-topolin (mT) resulted in a two-fold decrease in the number of shoots and leaves as well as a reduction in ethylene production. The addition of ethylene synthesis inhibitor (AVG) to mT-medium significantly reduced the ethylene production and the shoot growth, but it had no significant influence on the shoot formation. The mT-induced shoot formation was, however, significantly reduced in the presence of ethylene action inhibitor (AgNO3), in a manner dependent on sucrose levels. At the end of the subculture period, increased sucrose concentrations (15–40 g L−1) in the presence of mT and AgNO3 resulted in a 3.7-fold increase in ethylene emission. At the same time, the supply of sucrose caused a 2.8-fold increase in the level of endogenous abscisic acid (ABA). Our results may suggest that the inhibitory effect of high sucrose concentration (30 and 40 g L−1) may depend on its influence on ethylene sensitivity. It also suggests that sucrose-regulation of the shoot formation of Pelargonium in vitro is mediated by ABA.

Publisher

Biological Commission of the Polish Academy of Sciences – Cracow Branch

Date

2015[2015.01.01 AD - 2015.12.31 AD]

Identifier

ISSN 0001-5296 ; eISSN 1898-0295

References

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DOI

10.1515/abcsb-2015-0005

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