SciELO - Scientific Electronic Library Online

 
vol.21 issue4Changes in growth variables and potassium content in leaves of Black Barley in response to NaClInfluence of shoot inclination on irradiance and morphophysiological leaf traits along shoots in cerrado trees with distinct leaf deciduousness author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Brazilian Journal of Plant Physiology

Print version ISSN 1677-0420

Abstract

BOOZ, Maristela Raitz; KERBAUY, Gilberto B.; GUERRA, Miguel Pedro  and  PESCADOR, Rosete. The role of γ -aminobutyric acid (Gaba) in somatic embryogenesis of Acca sellowiana Berg. (Myrtaceae). Braz. J. Plant Physiol. [online]. 2009, vol.21, n.4, pp. 271-280. ISSN 1677-0420.  http://dx.doi.org/10.1590/S1677-04202009000400003.

The γ-aminobutyric acid (Gaba) is a non-protein amino acid found in prokaryotes and eukaryotes. Its role in plant development has not been fully established. This study reports a quantification of the levels of endogenous Gaba, as well as investigation of its role in different stages of somatic embryogenesis in Acca sellowiana Berg. (Myrtaceae). Zygotic embryos were used as explants and they were inoculated into the culture medium contained different concentrations of Gaba (0,2, 4, 6, 8 and 10 µM). The highest concentrations of endogenous Gaba were detected between the third and nine days after inoculation, reaching the value of 12.77 µmol.g-1FW. High frequency of somatic embryogenesis was observed in response to 10 µM Gaba. This treatment also resulted in a large number of normal embryos, and the lowest percentage of formation of fused somatic embryos, phenotypic characteristic of most deformed embryos in all treatments. Also, all treatments promoted the formation of the somatic embryos with positive characteristics of development resumption, which however did not originate the seedlings.

Keywords : Amino acid; pineapple guava; plant growth.

        · abstract in Portuguese     · text in English     · pdf in English