Ficus septica
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| DRR018373.fastq.gz | Fastqsanger.gz | |||
| DRR018374.fastq.gz | Fastqsanger.gz | |||
| DRR018375.fastq.gz | Fastqsanger.gz | |||
| DRR018376.fastq.gz | Fastqsanger.gz | |||
| DRR018377.fastq.gz | Fastqsanger.gz |
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Project description:Plant response to insect feeding appears to be highly specific with regard to the organisms in the system. Here, we report on the interaction between grapevine Vitis vinifera plants and a phloem-feeding insect pest, the vine mealybug Planococcus ficus. Plants were exposed to P. ficus for periods of 6 hours and 96 hours, after which they were analysed for gene expression levels using microarrays and quantitative real-time PCR (qPCR). Both methods showed that grapevine displayed only a minimal response to mealybug feeding at the transcript level at both time periods. Intermediate grapevine exposure times (24, 48 and 72 hours) to P. ficus feeding were investigated using qPCR analysis of ten additional genes associated with known plant defense responses. Results showed that only a single gene, pathogenesis-related protein 1, was differentially expressed after 48 hours of mealybug feeding. During the course of mealybug feeding, however, a number of other genes were significantly up- or down-regulated at certain time points. Thus, it appears as if grapevine responds minimally to feeding by P. ficus as well as within a very narrow time period. The relative lack of grapevine plant defense mechanisms may be a result of the feeding strategies of mealybugs.
2012-12-01 | GSE32343 | GEO
Project description:Plant response to insect feeding appears to be highly specific with regard to the organisms in the system. Here, we report on the interaction between grapevine Vitis vinifera plants and a phloem-feeding insect pest, the vine mealybug Planococcus ficus. Plants were exposed to P. ficus for periods of 6 hours and 96 hours, after which they were analysed for gene expression levels using microarrays and quantitative real-time PCR (qPCR). Both methods showed that grapevine displayed only a minimal response to mealybug feeding at the transcript level at both time periods. Intermediate grapevine exposure times (24, 48 and 72 hours) to P. ficus feeding were investigated using qPCR analysis of ten additional genes associated with known plant defense responses. Results showed that only a single gene, pathogenesis-related protein 1, was differentially expressed after 48 hours of mealybug feeding. During the course of mealybug feeding, however, a number of other genes were significantly up- or down-regulated at certain time points. Thus, it appears as if grapevine responds minimally to feeding by P. ficus as well as within a very narrow time period. The relative lack of grapevine plant defense mechanisms may be a result of the feeding strategies of mealybugs. Eight samples were analysed. Two replicates each were included for each treatment (6 hour and 96 hour feeding), resulting in four samples. Two control replicates were included for each treatment (6 hour and 96 hour feeding controls), resulting in a further four samples.
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Project description:The use of hybrid-poplar tree plantations as a source for biofuels and biomass production in temperate regions of the Northern Hemisphere has also, unintentionally, increased forest isoprene emissions to the atmosphere. The consequences of increased isoprene emissions include higher rates of tropospheric ozone production and increases in atmospheric aerosol production. Using RNA interference (RNAi) to suppress isoprene emission in several gene insertion events of hybrid-poplars, we show that this trait, which has been assumed as a requisite for the tolerance of abiotic stress, is not required for high rates of woody biomass production, even in extremely hot and dry climates. Biomass production over four years in experimental poplar plantations in Arizona and Oregon was similar among genetic lines that emitted or did not emit significant amounts of isoprene. Lines that had substantially reduced isoprene emission rates also showed decreases in flavonol pigments, which reduce oxidative damage during extremes of abiotic stress; a pattern that would be expected to amplify metabolic dysfunction during abiotic stress. Compensatory increases in the expression of other proteomic components, however, such as those that disable superoxide and other free radicals, and the fact that most biomass is produced during the spring, prior to the hottest and driest part of the growing season, explains the apparent paradox of high biomass production with low isoprene emission. The results of this study provide optimism for designing agroforest plantations of the future that provide high rates of lignocellulose production while eliminating detrimental effects of isoprene emission on atmospheric quality.
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