147 research outputs found
Heat and water stress induce unique transcriptional signatures of heat-shock proteins and transcription factors in grapevine
Grapevine is an extremely important crop worldwide.
In southern Europe, post-flowering phases of the growth
cycle can occur under high temperatures, excessive light, and
drought conditions at soil and/or atmospheric level. In this
study, we subjected greenhouse grown grapevine, variety
Aragonez, to two individual abiotic stresses, water deficit stress
(WDS), and heat stress (HS). The adaptation of plants to stress
is a complex response triggered by cascades of molecular
networks involved in stress perception, signal transduction,
and the expression of specific stress-related genes and metabolites.
Approaches such as array-based transcript profiling allow
assessing the expression of thousands of genes in control
and stress tissues. Using microarrays, we analyzed the leaf
transcriptomic profile of the grapevine plants. Photosynthesis
measurements verified that the plants were significantly affected
by the stresses applied. Leaf gene expression was obtained
using a high-throughput transcriptomic grapevine array, the
23K custom-made Affymetrix Vitis GeneChip. We identified
1,594 genes as differentially expressed between control and
treatments and grouped them into ten major functional categories
using MapMan software. The transcriptome of Aragonez
was more significantly affected by HS when compared with
WDS. The number of genes coding for heat-shock proteins and
transcription factors expressed solely in response to HS suggesting
their expression as unique signatures of HS. However, a cross-talk between the response pathways to both stresses was
observed at the level of AP2/ERF transcription factors
Passband shaping of grating-based WDM using cylindrical microlenses
NRC publication: Ye
Polarization splitter/combiner in high index contrast Bragg reflection waveguides
NRC publication: Ye
Polarization devices based on Bragg ref lector waveguides
NRC publication: Ye
Phase-stepping an all-fibre Sagnac loop for full characterization of femtosecond PMD
NRC publication: Ye
Loop of the rings: amplification of the phases of counter-propagating waves by a ring resonator in a Sagnac loop
NRC publication: Ye
\u960-shifted Sagnac interferometer for characterization of femtosecond first- and second-order polarization mode dispersion
NRC publication: Ye
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