INVESTIGADORES
KAMENETZKY Laura
congresos y reuniones científicas
Título:
Asr1 protein levels associated with changes in growth and development of tomato plants
Autor/es:
DOMINGUEZ G.; KAMENETZKY L.; BALBO I.; IUSEM N.; INSANI M.; IRIBARNE M. M.; FERNIE A. R.; CARRARI F.
Lugar:
Mar de Plata Argentina
Reunión:
Congreso; XLIII SAIB; 2007
Resumen:
ASR transcription factor family (abscicic
acid -ABA-, stress and ripening) is widely distributed in higher plants such as
tomato, potato, grape and others. Isolated evidences suggest these proteins to
be involved in a common transduction signaling pathway of carbohydrates and
ABA. Understanding the functionality of these proteins will render in their use
for metabolic engineer approaches. Transgenic tomato plants silenced and
overexpressing were obtained.An exhaustive phenotypic analysis of these plants
showed dramatic alterations in their growth and development patterns both during
vegetative and reproductive stages. Plant high and dry matter accumulation were
significantly reduced in silenced lines. Moreover, flowering and fruit set
patterns resulted significantly reduced in these transgenic in comparison with
the overexpressing lines and their controls. These changes correlated with
reductions in transpiration rate and stomata conductance measurements recorded during
early vegetative stages. In addition, silenced lines showed a decrease of total
yield and an increase in soluble solid contents of the fruits (SSC).
Preliminary analysis of total phenolic contents of these fruits showed no
differences between the lines and their corresponding controls.Adetailed
biochemical analysis of sink and source organs should allow to understand the
proposed cross-talk mechanisms.