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Populus tremula

ABSTRACT: A time series of autumn senescence leaves from populus tremula

PROVIDER: PRJNA343084 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4244310_1.fastq.gz	Fastqsanger.gz
	SRR4244310_2.fastq.gz	Fastqsanger.gz
	SRR4244320_1.fastq.gz	Fastqsanger.gz
	SRR4244320_2.fastq.gz	Fastqsanger.gz
	SRR4244311.fastq.gz	Fastqsanger.gz

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A time series of autumn senescence leaves from populus tremula

Project description:A gene expression analysis of the changes in in popolulus tremula during the autumn sensencece. Leaves were analyzed from late summer and late into autumn. Cytokinins are plant hormones that typically block or delay leaf senescence. We profiled 34 different cytokinins/cytokinin metabolites (including precursors, conjugates and degradation products) in leaves of a free-growing mature aspen (Populus tremula) before and after the initiation of autumnal senescence over three consecutive years. The levels and profiles of individual cytokinin species, or classes/groups, varied greatly between years, despite the fact that the onset of autumn senescence was at the same time each year, and senescence was not associated with depletion of either active or total cytokinin levels. Levels of aromatic cytokinins (topolins) were low and changed little over the autumn period. Diurnal variations and weather-dependent variations in cytokinin content were relatively limited. We also followed the expression patterns of all aspen genes implicated as having roles in cytokinin metabolism or signaling, but neither the pattern of regulation of any group of genes nor the expression of any particular gene supported the notion that decreased cytokinin signaling could explain the onset of senescence. Based on the results from this tree, we therefore suggest that cytokinin depletion is unlikely to explain the onset of autumn leaf senescence in aspen.

2016-12-11 | GSE86960 | GEO

Transcription profiling of autumn senescence in populus Leaves

Project description:Gene expression profiling in leaves of a free-growing aspen tree (Populus tremula) in Umea in northern Sweden during natural autumn senescence (from August 17 to September 21).

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24-hour herbivory exposure of VHb-expressing Populus tremula x Populus tremuloides

Project description:The expression of stress-related genes induced by feeding of chestnut moth larvae (Conistra vaccinii L.) was studied with Vitreoscilla hemoglobin-expressing (VHb) and non-transgenic hybrid aspen lines (Populus tremula x P. tremuloides). Besides the herbivore-injured leaves (L1), cDNA microarray analyses were conducted using uninjured leaves of hybrid aspen lines positioned above (A) and below (B) the herbivory exposed leaves. Two-condition experiment, control vs. herbivory exposure. Two hybrid aspen lines: non-transgenic V617 and VHb expressing V617 /45. Of each plant, three leaf types were analysed: the injured/uninjured leaf (L1) and nonorthostichous leaf positioned above (A) and below (B). Biological replicates: 3. On each array, two samples representing L1, A or B leaf type of control and herbivory treatment of either V617 or V617/45 line. line V617: wt_A_rep1-3, wt_B_rep1-3, wt_L1_rep1-3 line V617/45: VHb_A_rep1-3, VHb_B_rep1-3, VHb_L1_rep1-3 leaf type A: wt_A_rep1-3, VHb_A_rep1-3 leaf type B: wt_B_rep1-3, VHb_B_rep1-4 leaf type L1: wt_L1_rep1-3, VHb_L1_rep1-5

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poplar estradiol study-TRANSCRIPTOMIC ANALYSIS OF POPLAR STEM ACCOMMODATION TO REPEATED BENDING Species: Populus tremula x Populus aba

Project description:affy_pop_2011_08 - poplar estradiol study - genes regulated by PtaZFP2 in absence of mechanical stress - genes regulated by PtaZFP2 after one bending.Species: Populus tremula x Populus alba-The laboratory previously established a poplar transgenic line overexpressing PtaZFP2 under the control of an estradiol-inducible promoter. - the experiment, conducted on 3-month-old hydroponically-grown poplars, consists in the comparison of WT poplars treated with estradiol and the PtaZFP2-overexpressing line treated with estradiol. We also compared unbent and bent PtaZFP2-overexpressing poplars. The applied strain is quantitatively controlled (Coutand & Moulia, 2000, JExpBot; coutand et al., 2009, Plant Physiology)

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poplar estradiol study-TRANSCRIPTOMIC ANALYSIS OF POPLAR STEM ACCOMMODATION TO REPEATED BENDING Species: Populus tremula x Populus aba

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Hybrid aspen (Populus tremula x tremuloides) cambial zone RNA-sequencing with 35um wide fraction scheme

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