Metabolic shifts associated with drought-induced senescence in Brachypodium

Ahkami, Amir H.; Wang, Wenzhi; Wietsma, Thomas W.; Winkler, Tanya; Lange, Iris; Jansson, Christer; Lange, B. Markus; McDowell, Nate G.

doi:10.1016/j.plantsci.2019.110278

Title: Metabolic shifts associated with drought-induced senescence in Brachypodium

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Abstract

The metabolic underpinnings of plant survival under severe drought-induced senescence conditions are poorly understood. In this study, we assessed the morphological, physiological and metabolic responses to sustained water deficit in Brachypodium distachyon, a model organism for research on temperate grasses. Relative to control plants, fresh biomass, leaf water potential, and chlorophyll levels decreased rapidly in plants grown under drought conditions, demonstrating an early onset of senescence. The leaf C/N ratio and protein content showed an increase in plants subjected to drought stress. The concentrations of several small molecule carbohydrates and amino acid-derived metabolites previously implicated in osmotic protection increased rapidly in plants experiencing water deficit.

Authors:: Ahkami, Amir H.; Wang, Wenzhi; Wietsma, Thomas W.; Winkler, Tanya; Lange, Iris; Jansson, Christer; Lange, B. Markus; McDowell, Nate G.

Publication Date:: Sun Dec 01 00:00:00 EST 2019

Research Org.:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

OSTI Identifier:: 1571702

Alternate Identifier(s):: OSTI ID: 1570767

Report Number(s):: PNNL-SA-145496
Journal ID: ISSN 0168-9452; S0168945219306697; 110278; PII: S0168945219306697

Grant/Contract Number:: AC05-76RL01830

Resource Type:: Published Article

Journal Name:: Plant Science

Additional Journal Information:: Journal Name: Plant Science Journal Volume: 289 Journal Issue: C; Journal ID: ISSN 0168-9452

Publisher:: Elsevier

Country of Publication:: Ireland

Language:: English

Subject:: 59 BASIC BIOLOGICAL SCIENCES; drought; senescence; Brachypodium; mortality; metabolites; model grasses; abiotic stress

Citation Formats


                    Ahkami, Amir H., Wang, Wenzhi, Wietsma, Thomas W., Winkler, Tanya, Lange, Iris, Jansson, Christer, Lange, B. Markus, and McDowell, Nate G. Metabolic shifts associated with drought-induced senescence in Brachypodium.  Ireland: N. p., 2019. 
Web.  doi:10.1016/j.plantsci.2019.110278.

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                    Ahkami, Amir H., Wang, Wenzhi, Wietsma, Thomas W., Winkler, Tanya, Lange, Iris, Jansson, Christer, Lange, B. Markus, & McDowell, Nate G. Metabolic shifts associated with drought-induced senescence in Brachypodium.  Ireland.  https://doi.org/10.1016/j.plantsci.2019.110278

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                    Ahkami, Amir H., Wang, Wenzhi, Wietsma, Thomas W., Winkler, Tanya, Lange, Iris, Jansson, Christer, Lange, B. Markus, and McDowell, Nate G. Sun .  
"Metabolic shifts associated with drought-induced senescence in Brachypodium".  Ireland.  https://doi.org/10.1016/j.plantsci.2019.110278.

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@article{osti_1571702,

  title        = {Metabolic shifts associated with drought-induced senescence in Brachypodium},

  author       = {Ahkami, Amir H. and Wang, Wenzhi and Wietsma, Thomas W. and Winkler, Tanya and Lange, Iris and Jansson, Christer and Lange, B. Markus and McDowell, Nate G.},

  abstractNote = {The metabolic underpinnings of plant survival under severe drought-induced senescence conditions are poorly understood. In this study, we assessed the morphological, physiological and metabolic responses to sustained water deficit in Brachypodium distachyon, a model organism for research on temperate grasses. Relative to control plants, fresh biomass, leaf water potential, and chlorophyll levels decreased rapidly in plants grown under drought conditions, demonstrating an early onset of senescence. The leaf C/N ratio and protein content showed an increase in plants subjected to drought stress. The concentrations of several small molecule carbohydrates and amino acid-derived metabolites previously implicated in osmotic protection increased rapidly in plants experiencing water deficit.},

  doi          = {10.1016/j.plantsci.2019.110278},

  journal      = {Plant Science},

  number       = C,

  volume       = 289,

  place        = {Ireland},

  year         = {Sun Dec 01 00:00:00 EST 2019},

  month        = {Sun Dec 01 00:00:00 EST 2019}

}

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