Gene expression of a putative glutathione S-transferase is responsive to abiotic stress in embryogenic cell cultures of Cyclamen persicum
Electron. j. biotechnol
; 15(1): 6-6, Jan. 2012. ilus, tab
Article
en En
| LILACS
| ID: lil-640532
Biblioteca responsable:
CL1.1
ABSTRACT
Background:
Cyclamen persicum is an economically important ornamental crop that is propagated exclusively through seeds as vegetative propagation using cuttings is not possible. Therefore a micropropagation method through somatic embryogenesis is of high interest; however the method suffers from low reliability concerning quality and quantity of the produced plantlets. A crucial step of the protocol is the removal of plant growth regulators (PGRs) that triggers embryo development. In order to get a better insight in this crucial step of the propagation process, a gene expression analysis has been set up using five different genes of glutathione S-transferases (GST) as these are known to be auxin responsive as well as stress reactive.Results:
One out of the five genes of glutathione S-transferases (CpGST1) displayed a clear down-regulation 72 hrs after removal of PGRs compared to 4 hrs after, implying auxin responsiveness. However, a more detailed analysis including the time points 0, 4 and 72 hrs revealed an initial strong up-regulation after 4 hrs before it was down-regulated after 72 hrs. In comparison fold-changes of the additional four GST-genes were marginal. Comparing cultures on semisolid medium to that in suspension, transcript abundances of CpGST1 were clearly decreased in suspension culture.Conclusions:
Against the initial hypothesis CpGST was not auxin responsive but stress reactive, probably especially indicating drought stress imposed on the cells upon transfer from submerged suspension culture to semisolid medium. Mechanical stress caused by shaking of suspensions cultures seemed to be less important.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Expresión Génica
/
Cyclamen
/
Glutatión Transferasa
Idioma:
En
Revista:
Electron. j. biotechnol
Asunto de la revista:
BIOTECNOLOGIA
Año:
2012
Tipo del documento:
Article
/
Project document
País de afiliación:
Alemania
Pais de publicación:
Chile