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Dissecting Low Atmospheric Pressure Stress: Transcriptome Responses to the Components of Hypobaria in Arabidopsis [Experiment 2]

Metadata Updated: December 6, 2023

Controlled hypobaria presents biology with an environment that is never encountered in terrestrial ecology yet the apparent components of hypobaria are stresses typical of terrestrial ecosystems. High altitude for example presents terrestrial hypobaria always with hypoxia as a component stress since the relative partial pressure of O2 is constant in the atmosphere. Laboratory-controlled hypobaria however allows the dissection of pressure effects away from the effects typically associated with altitude in particular hypoxia as the partial pressure of O2 can be varied. In this study whole transcriptomes of plants grown in ambient (97 kPa/pO2 = 21 kPa) atmospheric conditions were compared to those of plants transferred to five different atmospheres of varying pressure and oxygen composition for 24 h: 50 kPa/pO2 = 10 kPa 25 kPa/pO2 = 5 kPa 50 kPa/pO2 = 21 kPa 25 kPa/pO2 = 21 kPa or 97 kPa/pO2 = 5 kPa. The plants exposed to these environments were 10 day old Arabidopsis seedlings grown vertically on hydrated nutrient plates. In addition 5 day old plants were also exposed for 24 h to the 50 kPa and ambient environments to evaluate age-dependent responses. The gene expression profiles from roots and shoots showed that the hypobaric response contained more complex gene regulation than simple hypoxia and that adding back oxygen to normoxic conditions did not completely alleviate gene expression changes in hypobaric responses.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date January 31, 2023
Metadata Updated Date December 6, 2023
Data Update Frequency irregular

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date January 31, 2023
Metadata Updated Date December 6, 2023
Publisher National Aeronautics and Space Administration
Identifier nasa_genelab_GLDS-136_hqvu-bwfr
Data First Published 2018-06-26
Data Last Modified 2023-01-26
Category Earth Science
Public Access Level public
Data Update Frequency irregular
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 778a36e6-edb8-4ad8-a97a-ae84f4beb43f
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Program Code 026:005
Source Datajson Identifier True
Source Hash f619df2c191772d165ba32efef5290547a1ac460b32032e1fd311041730b6b61
Source Schema Version 1.1

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