Počet záznamů: 1

Effect of abscisic acid on photosynthetic parameters during ex vitro transfer of micropropagated tobacco plantlets

  1. 1.
    0336069 - UEB-Q 2010 RIV NL eng J - Článek v odborném periodiku
    Pospíšilová, Jana - Synková, Helena - Haisel, Daniel - Baťková, Petra
    Effect of abscisic acid on photosynthetic parameters during ex vitro transfer of micropropagated tobacco plantlets.
    Biologia Plantarum. Roč. 53, č. 1 (2009), s. 11-20 ISSN 0006-3134
    Grant CEP: GA ČR GA522/07/0227
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: carotenoids * chlorophyll contents * chlorophyll fluorescence
    Kód oboru RIV: ED - Fyziologie
    Impakt faktor: 1.656, rok: 2009

    The aim of this research was to determine whether exogenous abscisic acid (ABA) applied immediately after ex vitro transfer of in vitro grown plants can improve their acclimatization. Tobacco (Nicotiana tabacum L.) plantlets were transferred into pots with Perlite initially moistened either by water or 50 A mu M ABA solution and they were grown under low (LI) or high (HI) irradiance of 150 and 700 A mu mol m(-2) s(-1), respectively. Endogenous content of ABA in tobacco leaves increased considerably after ABA application and even more in plants grown under HI. Stomatal conductance, transpiration rate and net photosynthetic rate decreased considerably 1 d after ex vitro transfer and increased thereafter. The gas exchange parameters were further decreased by ABA application and so wilting of these plants was limited. Chlorophyll (a+b) and beta-carotene contents were higher in ABA-treated plants, but the content of xanthophyll cycle pigments was not increased.
    Trvalý link: http://hdl.handle.net/11104/0180391