| dc.description.abstract | Abiotic stress is one of the most serious causes that pose a detrimental impact on
the growth and survival of plants. The plant-specific NAC (NAM, ATAF1/2, CUC2)
transcription factors have been suggested to play important roles in the regulation
of the transcriptional activities associated with plant stress responses. Soybean
(Glycine max) GmNAC109 has been recently demonstrated for its importance in
enhancing the post-drought survival in transgenic Arabidopsis plants ectopically
expressing this gene. In this study, several comparisons of biochemical
characteristics were carried out between these GmNAC109-transgenic Arabidopsis
lines and the wild-type plants. According to the data analysis, upon drought stress,
the transgenic Arabidopsis had lower hydrogen peroxide contents and higher
activities of antioxidant enzymes superoxide dismutase, peroxidase and catalase
than those in the non-transgenic counterparts. These results indicated that the
higher antioxidant capacity in the transgenic Arabidopsis partially attributed to the
better plant tolerance under water-deficit stress conditions, which is related to the
regulation of GmNAC109 on activities of reactive oxygen species – scavenging
enzymes. | en_US |
