Transcriptome Analysis of Drought-Resistant and Drought-Sensitive Sorghum (Sorghum bicolor) Genotypes in Response to PEG-Induced Drought Stress

Abdel-Ghany, Salah E.; Ullah, Fahad; Ben-Hur, Asa; Reddy, Anireddy S.  N.

doi:10.3390/ijms21030772

Transcriptome Analysis of Drought-Resistant and Drought-Sensitive Sorghum (Sorghum bicolor) Genotypes in Response to PEG-Induced Drought Stress

Journal Article · Thu Jan 23 23:00:00 EST 2020 · International Journal of Molecular Sciences (Online)

DOI:https://doi.org/10.3390/ijms21030772· OSTI ID:1802159

Abdel-Ghany, Salah E. ^[1]; Ullah, Fahad ^[2]; ^[2]; Reddy, Anireddy S. N. ^[3]

Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology and Cell and Molecular Biology Program; OSTI
Colorado State Univ., Fort Collins, CO (United States). Computer Science Dept.
Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology and Cell and Molecular Biology Program

Drought is a major limiting factor of crop yields. In response to drought, plants reprogram their gene expression, which ultimately regulates a multitude of biochemical and physiological processes. The timing of this reprogramming and the nature of the drought-regulated genes in different genotypes are thought to confer differential tolerance to drought stress. Sorghum is a highly drought-tolerant crop and has been increasingly used as a model cereal to identify genes that confer tolerance. Also, there is considerable natural variation in resistance to drought in different sorghum genotypes. Here, we evaluated drought resistance in four genotypes to polyethylene glycol (PEG)-induced drought stress at the seedling stage and performed transcriptome analysis in seedlings of sorghum genotypes that are either drought-resistant or drought-sensitive to identify drought-regulated changes in gene expression that are unique to drought-resistant genotypes of sorghum. Our analysis revealed that about 180 genes are differentially regulated in response to drought stress only in drought-resistant genotypes and most of these (over 70%) are up-regulated in response to drought. Among these, about 70 genes are novel with no known function and the remaining are transcription factors, signaling and stress-related proteins implicated in drought tolerance in other crops. This study revealed a set of drought-regulated genes, including many genes encoding uncharacterized proteins that are associated with drought tolerance at the seedling stage.

View Accepted Manuscript (DOE)

Research Organization:: Colorado State Univ., Fort Collins, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: SC0010733

OSTI ID:: 1802159

Journal Information:: International Journal of Molecular Sciences (Online), Journal Name: International Journal of Molecular Sciences (Online) Journal Issue: 3 Vol. 21; ISSN IJMCFK; ISSN 1422-0067

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
59 BASIC BIOLOGICAL SCIENCES
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drought
drought resistance
gene expression
polyethylene glycol (PEG)
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transcriptome

Transcriptome Analysis of Drought-Resistant and Drought-Sensitive Sorghum (Sorghum bicolor) Genotypes in Response to PEG-Induced Drought Stress

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