Planta

, Volume 236, Issue 6, pp 1775–1790

Physiological responses and endogenous cytokinin profiles of tissue-cultured ‘Williams’ bananas in relation to roscovitine and an inhibitor of cytokinin oxidase/dehydrogenase (INCYDE) treatments

  • Adeyemi O. Aremu
  • Michael W. Bairu
  • Ondřej Novák
  • Lenka Plačková
  • Marek Zatloukal
  • Karel Doležal
  • Jeffrey F. Finnie
  • Miroslav Strnad
  • Johannes Van Staden
Original Article

DOI: 10.1007/s00425-012-1721-z

Cite this article as:
Aremu, A.O., Bairu, M.W., Novák, O. et al. Planta (2012) 236: 1775. doi:10.1007/s00425-012-1721-z

Abstract

The effect of supplementing either meta-topolin (mT) or N6-benzyladenine (BA) requiring cultures with roscovitine (6-benzylamino-2-[1(R)-(hydroxymethyl)propyl]amino-9-isopropylpurine), a cyclin-dependent kinase (CDK) and N-glucosylation inhibitor, and INCYDE (2-chloro-6-(3-methoxyphenyl)aminopurine), an inhibitor of cytokinin (CK) degradation, on the endogenous CK profiles and physiology of banana in vitro was investigated. Growth parameters including multiplication rate and biomass were recorded after 42 days. Endogenous CK levels were quantified using UPLC–MS/MS while the photosynthetic pigment and phenolic contents were evaluated spectrophotometrically. The highest regeneration rate (93 %) was observed in BA + roscovitine while mT + INCYDE plantlets produced most shoots. Treatment with BA + roscovitine had the highest shoot length and biomass. Although not significant, there was a higher proanthocyanidin level in BA + roscovitine treatments compared to the control (BA). The levels of total phenolics and flavonoids were significantly higher in mT + roscovitine treatment than in the mT-treated regenerants. The presence of roscovitine and/or INCYDE had no significant effect on the photosynthetic pigments of the banana plantlets. Forty-seven aromatic and isoprenoid CKs categorized into nine CK-types were detected at varying concentrations. The presence of mT + roscovitine and/or INCYDE increased the levels of O-glucosides while 9-glucosides were higher in the presence of BA. Generally, the underground parts had higher CK levels than the aerial parts; however, the presence of INCYDE increased the level of CK quantified in the aerial parts. From a practical perspective, the use of roscovitine and INCYDE in micropropagation could be crucial in the alleviation of commonly observed in vitro-induced physiological abnormalities.

Keywords

Cyclin-dependent kinaseCytokinin metabolismMicropropagationMusa spp.PhotosynthesisPlant secondary metabolites

Abbreviations

ANOVA

Analysis of variance

BA

N6-Benzyladenine

BA9G

N6-Benzyladenine-9-glucoside

BAR

N6-Benzyladenosine

BAR5′MP

N6-Benzyladenosine-5′-monophosphate

CCE

Cyanidin chloride equivalents

CDK

Cyclin-dependent kinase

CE

Catechin equivalents

CK

Cytokinin

CKX

Cytokinin oxidase/dehydrogenase

cZ

cis-Zeatin

cZ9G

cis-Zeatin-9-glucoside

cZOG

cis-Zeatin-O-glucoside

cZR

cis-Zeatin riboside

cZR5′MP

cis-Zeatin riboside-5′-monophosphate

cZROG

cis-Zeatin-O-glucoside riboside

DHZ

Dihydrozeatin

DHZ9G

Dihydrozeatin-9-glucoside

DHZOG

Dihydrozeatin-O-glucoside

DHZR

Dihydrozeatin riboside

DHZR5′MP

Dihydrozeatin riboside-5′-monophosphate

DHZROG

Dihydrozeatin-O-glucoside riboside

DMRT

Duncan’s multiple range test

GAE

Gallic acid equivalents

IAC

Immunoaffinity chromatography

INCYDE

2-Chloro-6-(3-methoxyphenyl)aminopurine

iP

N6-Isopentenyladenine

iP9G

N6-Isopentenyladenine-9-glucoside

iPR

N6-Isopentenyladenosine

iPR5′MP

N6-Isopentenyladenosine-5′-monophosphate

IPT

Isopentenyltransferase

Kin

Kinetin

Kin9G

Kinetin-9-glucoside

KinR

Kinetin riboside

KinR5′MP

Kinetin riboside-5′-monophosphate

MRM

Multiple reaction monitoring

MS

Murashige and Skoog medium

mT

meta-Topolin

mT9G

meta-Topolin-9-glucoside

mTOG

meta-Topolin-O-glucoside

mTR

meta-Topolin riboside

mTR5′MP

meta-Topolin-5′-monophosphate

mTROG

meta-Topolin-O-glucoside riboside

oT

ortho-Topolin

oT9G

ortho-Topolin-9-glucoside

oTOG

ortho-Topolin-O-glucoside

oTR

ortho-Topolin riboside

oTR5′MP

ortho-Topolin-5′-monophosphate

oTROG

ortho-Topolin-O-glucoside riboside

PGR

Plant growth regulator

PPFD

Photosynthetic photon flux density

pT

para-Topolin

PTC

Plant tissue culture

pTOG

para-Topolin-O-glucoside

pTR

para-Topolin riboside

pTR5′MP

para-Topolin-5′-monophosphate

pTROG

para-Topolin-O-glucoside riboside

tZ

trans-Zeatin

tZ9G

trans-Zeatin-9-glucoside

tZOG

trans-Zeatin-O-glucoside

tZR

trans-Zeatin riboside

tZR5′MP

trans-Zeatin riboside-5′-monophosphate

tZROG

trans-Zeatin-O-glucoside riboside

UPLC

Ultra performance liquid chromatography

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Adeyemi O. Aremu
    • 1
  • Michael W. Bairu
    • 1
  • Ondřej Novák
    • 2
  • Lenka Plačková
    • 2
    • 3
  • Marek Zatloukal
    • 2
    • 3
  • Karel Doležal
    • 2
    • 3
  • Jeffrey F. Finnie
    • 1
  • Miroslav Strnad
    • 2
    • 3
  • Johannes Van Staden
    • 1
  1. 1.Research Centre for Plant Growth and Development, School of Life SciencesUniversity of KwaZulu-NatalPietermaritzburgSouth Africa
  2. 2.Laboratory of Growth Regulators, Institute of Experimental Botany AS CRPalacký UniversityOlomoucCzech Republic
  3. 3.Faculty of Science, Centre of the Region Haná for Biotechnological and Agricultural ResearchPalacký UniversityOlomoucCzech Republic