Chlorophyll a fluorescence of sweet potato plants cultivated in vitro and during ex vitro acclimatization

AUTOR(ES)

Cassana, Francine F., Falqueto, Antelmo R., Braga, Eugenia J. B., Peters, Jose A., Bacarin, Marcos A.

FONTE

Brazilian Journal of Plant Physiology

DATA DE PUBLICAÇÃO

2010

RESUMO

Sweet potato (Ipomoea batatas L.) plants were cultivated in vitro in Murashige and Skoog (MS) medium with 20 and 40 g L-1 of sucrose under two different photon flux densities (21 and 60 µmol m-2 s-1). Leaves developed in vitro mostly showed high variable to maximum fluorescence ratio (F V/F M) , indicating good development of photosynthetic apparatus. This ratio decreased during leaf aging, especially in the plants cultivated in vitro on medium with higher sucrose concentration and higher photon flux. Leaves developed ex vitro showed high F V/F M ratio during whole experiment. The effective photochemical efficiency (F V'/F M') was maximum at 15th day after emergence of leaves. Photosynthetic potential rate was higher in leaves developed in vitro than in leaves originated ex vitro.

Documentos Relacionados

• CHLOROPHYLL FLUORESCENCE OF BASIL PLANTS CULTIVATED IN A HYDROPONIC SYSTEM USING TREATED DOMESTIC WASTEWATER
• Anatomical and physiological analyses of peach palm leaves from in vitro, ex vitro and in vivo cultivated plants designed to optimize the acclimatization protocol
• Influence of substrates and in vitro preconditioning treatments on ex vitro acclimatization of Arachis retusa.
• In vitro culture at low temperature and ex vitro acclimatization of Vriesea inflata an ornamental bromeliad
• Cell Isoperoxidases in Sweet Potato Plants in Relation to Mechanical Injury and Ethylene