Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2011 Oct;6(10):1475-8.
doi: 10.4161/psb.6.10.17695. Epub 2011 Oct 1.

The role of transcriptional coactivator ADA2b in Arabidopsis abiotic stress responses

Konstantinos E Vlachonasios  1 , Athanasios Kaldis, Adriana Nikoloudi, Despoina Tsementzi
Affiliations
Review

The role of transcriptional coactivator ADA2b in Arabidopsis abiotic stress responses

Konstantinos E Vlachonasios et al. Plant Signal Behav. 2011 Oct.

Abstract

Plant growth and crop production can be greatly affected by common environmental stresses such as drought, high salinity and low temperatures. Gene expression is affected by several abiotic stresses. Stress-inducible genes are regulated by transcription factors and epigenetic mechanisms such as histone modifications. In this Mini-Review, we have explored the role of transcriptional adaptor ADA2b in Arabidopsis responses to abiotic stress. ADA2b is required for the expression of genes involved in abiotic stress either by controlling H3 and H4 acetylation in the case of salt stress or affecting nucleosome occupancy in low temperatures response.

PubMed Disclaimer

Figures

Figure 1
Figure 1
ADA2b is a key regulator of abiotic stress. (A) ada2b-1 mutants are drought tolerant; photo was taken 20 d after water starvation. (B) Whole plant transpiration of wild type (white square) and ada2b-1 (black square) mutant plants. Changes in soil water content during drought stress is indicated. (C) The effect of ADA2a, ADA2b and GCN5 on salt-induced RD29b expression. Wild-type Ws, ada2a-1, ada2a-2 and gcn5-1 plants were subjected to salt stress (100 mM NaCl) for various time as indicated. RNA were isolated from whole seedling and real-time Reverse Transcription PCR was performed using specific primers for RD29b. Fold induction of these genes after exposure to 100 mM NaCl were calculated by normalizing values from salt-treated plants with those from untreated samples. Values are presented on a logarithmic scale. For each mutant and wild-type plants, triplicate samples in each experiment were assayed twice. Three independent experiments were performed, error bars represent SE where n = 4. (D) Schematic representation of ADA2b function. ADA2b promotes histone acetyaltion in salt-induced genes and confers salt tolerance whereas it represses freezing and drought tolerant in Arabidopsis.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Boyer JS. Plant productivity and environment. Science. 1982;218:443–448. doi: 10.1126/science.218.4571.443. - DOI - PubMed
    1. Ghassemi F, Jakeman AJ, Nix HA. Salinisation of land and water resources: Human causes, extent, management and case studies. Sydney, Australia: UNSW Press; 1995. p. 540. Wallingford, UK: CAB International.
    1. Nakashima K, Ito Y, Yamaguchi-Shinozaki K. Transcriptional regulatory networks in response to abiotic stresses in Arabidopsis and grasses. Plant Physiol. 2009;149:88–95. doi: 10.1104/pp.108.129791. - DOI - PMC - PubMed
    1. Berger SL. The complex language of chromatin regulation during transcription. Nature. 2007;447:407–412. doi: 10.1038/nature05915. - DOI - PubMed
    1. Chinnusamy V, Zhu JK. Epigenetic regulation of stress responses in plants. Curr Opin Plant Biol. 2009;12:133–139. doi: 10.1016/j.pbi.2008.12.006. - DOI - PMC - PubMed

MeSH terms

LinkOut - more resources