Acta biologica Cracoviensia. Series botanica (ACTA BIOL CRACOV BOT )

Publisher: Polska Akademia Nauk. Komisja Biologiczna


Acta Biologica Cracoviensia Series Botanica publishes original papers embodying the results of experimental or theoretical research, invited reviews, and brief communications in: Anatomy; Morphology; Cytology; Genetics; Karyology; Embryology; Tissue culture; Physiology; Biosystematics.

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    Acta biologica cracoviensia. Series. Botanica
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Cadmium is known to be reactive oxygen species (ROS) inducer and photosynthesis inhibitor, in addition its toxicity depends on CO2 concentration. Many microalgae respond to CO2 limitation by the induction of a carbon concentrating mechanism (CCM). There are evidences that a CCM is the result of an interaction between DIC transport system and a compartmentation of Rubisco and carbonic anhydrase (CA, EC. Cah3 is one of CAs located on the luminal side of thylakoid, functionally associated with the electron donor side of photosystem II. In this study we try to elucidate a role of Cah3 in tolerance of algal cells to cadmium induced oxidative stress.
    Acta biologica Cracoviensia. Series botanica 06/2014; 56, suppl. 2:36.
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    ABSTRACT: Carbonic anhydrase (CA, EC catalyze the reversible reaction CO2+H2O↔HCO3-+H+ providing a substrate (CO2) for Rubisco. To date, three gens families encoding distinct classes of CAs have been identified (α-, β- and γ-CA) in Chlamydomonas reinhardtii. Among them, α-type lumenal CAH3 is the key enzyme required for the optimal function of the water oxidation complex at the donor side of PSII. Cadmium inhibits photosynthesis, but the exact mechanism of this inhibition remains unclear. The aim of this work was to assess whether CAH3-deficiency affects photosynthetic activity of Chlamydomonas reinhardtii cells grown in Cd-induced stress conditions.
    Acta biologica Cracoviensia. Series botanica 06/2014; 56, suppl. 2:49.
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    ABSTRACT: Cryopreservation (i.e. storage at the temperature of liquid nitrogen; LN -196oC) is the most safe and cost-effective long-term conservation method of non-orthodox seed species. Somatic embryogenesis, on the other hand, is considered to be the most efficient (micro)propagation technique. By combining in vitro tissue culture techniques with cryoconservation it is possible to develop highly-diverse gene banks of both vegetatively and generatively propagated species on a small surface at reduced costs. The application of embryonic tissue for storage in LN is very beneficial, especially with endangered species, since it does not require injuring the mother plant (Lema-Rumińska and Kulus 2012). The seeds are very often stored at sub-zero temperatures. Their great advantage is the fact that they show a decrease in water content in comparison to vegetative tissues, which is the bottleneck for cryopreservation success. Overtime zygotic embryos or their axes of about 100 species, and somatic embryos of approximately 40 species of plants from different climates have been cryopreserved with variable survival and/or regrowth rates (Engelmann 2011). The cryopreservation procedures are developed better for the latter ones. For several species, an attempt of freezing embryogenic callus has been also made. This may be a good method for maintaining its embryonic potential. There are even some reports referring to embryogenic potential or metabolic activity growth of proembryogenic masses (PEMs) of some species observed after freezing. In the past various cryopreservation techniques have been applied. As for seeds direct immersion in liquid nitrogen, or simple air-drying (for 1-5 h) is possible. With some species these techniques can be even applied with embryos. Still, the so-called modern methods (e.g. preculture, vitrification, droplet-vitrification or their combinations) are usually more efficient. As for PEMs, the encapsulation-based techniques are the most often applied. There are also reports on employing slow-freezing for embryogenic tissues. All the protocols, however, need to be adjusted not only to the individual needs of species but also even to single cultivars. References Engelmann F. (2011). Cryopreservation of embryos: an overview. Methods in Molecular Biology 710: 155-154. Lema-Rumińska, J., Kulus, D. (2012). Induction of somatic embryogenesis in Astrophytum asterias (Zucc.) Lem. in the aspect of light conditions and auxin 2,4-D concentrations. Acta Scientiarum Polonorum – Hortortorum Cultus 11(4): 77-87.
    Acta biologica Cracoviensia. Series botanica 05/2014; 56(1):68.
  • Acta biologica Cracoviensia. Series botanica 01/2014; 56(1):1-7.