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35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Solanum lycopersicum

PROVIDER: GSE68641 | GEO | 2015/05/08

SECONDARY ACCESSION(S): PRJNA283281

REPOSITORIES: GEO

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35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2015-05-08 | E-GEOD-68641 | biostudies-arrayexpress

Expression data from leaf tissues of 35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

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Expression data from root tissues of 35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

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35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

Project description:35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

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Expression data from leaf tissues of 35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

Project description:Arabidopsis HMA4 transformation facilitates Zn root-to-shoot translocation, but in Zn-supply dependent manner. It implies that distinct effects of HMA4 expression on Zn root:shoot distribution in transgenics grown under different Zn supply regimes results from the interaction between the transgene activity and the molecular background of the host plant. Microarray analysis was performed to compare expression profiles in leaves of transgenic and WT-plants grown in the presence of 5 µM Zn to identify the molecular mechanism underlying the difference in Zn root:shoot distribution between 35S:AtHMA4-expressing and wild-type tomato. To recognize tissue specific alterations in gene transcription in tomato leaves invoked by AtHMA4 expression, spongy paerenchyma + lower epidermis and palisade paerenchyma + upper epidermis were isolated using LCM technique. Understanding the interplay between the transgene and the endogens is crucial for planning genetic modification for Zn-biofortification purpose. 10-day old tomato plant (35S:AtHMA4 expressing and WT) were subjected to 5 µM Zn (added as ZnSo4) for 15 days. Three independent experiments were performed. At the end of each experiment the 3rd and 4th leaf (counting upwards) were collected, 1-2 mm long and 2-3 mm wide fragments were cut out from between the vascular bundles in the middle part of each leaf, embedded in NEG-50 Frozen Section Medium (Thermo Scientific), and frozen in liquid nitrogen. Total RNA isolated from three batches of leaves was amplified and used for three independent microarray analysis.

2015-05-08 | E-GEOD-68640 | biostudies-arrayexpress

Expression data from root tissues of 35S:AtHMA4 and wild-type tomato plants grown in the presence of Zn

Project description:Ectopic expression of AtHMA4 in tomato modified Zn accumulation in a Zn-supply dependent manner. It suggests that HMA4-expression under a range of Zn-supply differentially modifies the expression of endogens, which contributes to different Zn-related phenotypes. To identify genes differentially regulated in 35S:AtHMA4-expressing and wild-type tomato, the transcription profiles were compared between roots of transgenic and WT-plants grown in the presence of 5 µM Zn. An effort was undertaken to recognize tissue specific alterations underlying the difference in Zn root:shoot distribution between tested plant lines and LCM technique was used to isolate epidermis+cortex and stele from roots.Understanding the interplay between the transgene and the endogens is crucial for planning genetic modification for Zn-biofortification purpose. 10-day old tomato plant (35S:AtHMA4 expressing and WT) were subjected to 5 µM Zn (added as ZnSo4) for 15 days. Three independent experiments were performed. At the end of each experiment 2.0 cm long root fragments from six plants (excluding 1.5 cm long apical fragments) were pooled, embedded in NEG-50 Frozen Section Medium (Thermo Scientific), and frozen in liquid nitrogen. Total RNA isolated from three batches of roots was amplified and used for three independent microarray analysis.

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Expression data from tobacco expressing 35S-AtHMA4 compared to the wild-type plants grown in the presence of Cd

Project description:Cd levels in the shoots, as well as in the roots were unexpectedly reduced in 35S:AtHMA4-expressing tobacco. Obtained results indicate that in the generation of the Cd-related phenotypes of transgenic plants substantial modifications of the host plant transcriptome was involved. Microarray based analysis was performed to compare expression profiles of the roots from tobacco expressing 35S-AtHMA4 with the wild-type (WT) plants, which were grown in the presence of 0.25 µM Cd. An effort was undertaken to understand which processes were modified in tobacco as a result of the expression of 35S:AtHMA4, which lead to decreased Cd uptake and lower accumulation in the shoots. Knowing underlying mechanisms is important for developing strategies to grow low cadmium tobacco.

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