FČ

F. Čáp

Charles University

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Ingrid Tichá

Charles University

Christian Schäfer

Firmenich (Switzerland)

D. Haisel

Czech Academy of Sciences, Institute of Experimental Botany

VČ

Věra Čapková

Institute of Clinical and Experimental Medicine

D. Pacovská

Charles University

Michal Tichý

Masaryk Memorial Cancer Institute

Milan Babiš

Institute of Clinical and Experimental Medicine

Petr Hofman

Charles University

Monika Dezortová

Institute of Clinical and Experimental Medicine

S. Julis

AeskuLab (Czechia)

Cooperative Institutions

Charles University

Czech Academy of Sciences, Institute of Experimental Botany

Czech Academy of Sciences

Institute of Clinical and Experimental Medicine

Masaryk Memorial Cancer Institute

University Hospital in Motol

Czech Education and Scientific Network

Czech Technical University in Prague

Masaryk University

St. Anne's University Hospital Brno

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Photosynthesis and Photoinhibition in Tobacco Plantlets Grown in vitro: An Ontogenetic Approach

Springer eBooks (1998)

Ingrid Tichá F. Čáp D. Pacovská D. Haisel Věra Čapková

Photoinhibition

Ex vivo

10.1007/978-94-011-3953-3_522

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Citations (1)

Culture on sugar medium enhances photosynthetic capacity and high light resistance of plantlets grown in vitro

Physiologia Plantarum (1998)

Ingrid Tichá F. Čáp D. Pacovská Petr Hofman D. Haisel

The significance of photosynthetic photon flux (PPF) and sugar feeding for the production of plants in vitro is only poorly understood. Nicotiana tabacum L. plantlets were grown photoautotrophically and photomixotrophically (3% sucrose) at two different PPFs (60 µmol m −2 s −1 and 200 µmol m −2 s −1 ) to investigate the effect of these culture parameters on photosynthetic performance and growth. Photomixotrophically‐grown plantlets showed an increase in carbohydrate content, mainly in glucose and fructose. Plant growth, dry matter accumulation and total leaf area were higher under photomixotrophic than photoautotrophic conditions. Not only biomass formation but also photosynthesis was positively affected by exogenous sucrose; the chlorophyll (Chl) content and the light‐saturated rate of photosynthetic oxygen evolution were higher in photomixotrophic plantlets. Photoinhibition occurred in plantlets that were grown photoautotrophically at the higher PPF. It became apparent as a loss in Chl content and photochemical efficiency. Photoinhibited plantlets showed a decrease in the D2/LHCII and CP47/LHCII ratios, suggesting a preferential loss of proteins from the photosystem II (PSII) core. The increased content of xanthophyll cycle pigments in photoinhibited plantlets indicated that also protective mechanisms were activated. Photomixotrophic growth of the plantlets prevented the occurrence of photoinhibitory symptoms. Therefore, we conclude that culture on sugar medium increases not only the photosynthetic potential but also the high light resistance of plantlets grown in vitro.

Photoinhibition

Photosynthetic pigment

10.1034/j.1399-3054.1998.1020201.x

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Citations (88)

MR spectroscopy in the examination of neoplastic brain diseases. Qualitative interpretation of 1 H MR spectra

Česká a slovenská neurologie a neurochirurgie (1994)

Monika Dezortová F. Čáp Milan Babiš Milan Hájek J. Malis

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