"Transcriptomic view of survival during early seedling growth of the ex" by Ligang Fan, Guannan Wang et al.

Faculty Publications

Title

Transcriptomic view of survival during early seedling growth of the extremophyte Haloxylon ammodendron

Authors

Ligang Fan, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
Guannan Wang, Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA, 70803, USA.
Wei Hu, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
Pramod Pantha, Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA, 70803, USA.
Kieu-Nga Tran, Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA, 70803, USA.
Hua Zhang, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
Lizhe An, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
Maheshi Dassanayake, Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, LA, 70803, USA. Electronic address: maheshid@lsu.edu.

Document Type

Article

Publication Date

11-1-2018

Abstract

Seedling establishment in an extreme environment requires an integrated genomic and physiological response to survive multiple abiotic stresses. The extremophyte, Haloxylon ammodendron is a pioneer species capable of colonizing temperate desert sand dunes. We investigated the induced and basal transcriptomes in H. ammodendron under water-deficit stress during early seedling establishment. We find that not only drought-responsive genes, but multiple genes in pathways associated with salt, osmotic, cold, UV, and high-light stresses were induced, suggesting an altered regulatory stress response system. Additionally, H. ammodendron exhibited enhanced biotic stress tolerance by down-regulation of genes that were generally up-regulated during pathogen entry in susceptible plants. By comparing the H. ammodendron basal transcriptome to six closely related transcriptomes in Amaranthaceae, we detected enriched basal level transcripts in H. ammodendron that shows preadaptation to abiotic stress and pathogens. We found transcripts that were generally maintained at low levels and some induced only under abiotic stress in the stress-sensitive model, Arabidopsis thaliana to be highly expressed under basal conditions in the Amaranthaceae transcriptomes including H. ammodendron. H. ammodendron shows coordinated expression of genes that regulate stress tolerance and seedling development resource allocation to support survival against multiple stresses in a sand dune dominated temperate desert environment.

Publication Source (Journal or Book title)

Plant physiology and biochemistry : PPB

First Page

475

Last Page

489

Recommended Citation

Fan, L., Wang, G., Hu, W., Pantha, P., Tran, K., Zhang, H., An, L., & Dassanayake, M. (2018). Transcriptomic view of survival during early seedling growth of the extremophyte Haloxylon ammodendron. Plant physiology and biochemistry : PPB, 132, 475-489. https://doi.org/10.1016/j.plaphy.2018.09.024

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