Journal
ENVIRONMENTAL RESEARCH
Volume 197, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111030
Keywords
TAZ; Proteins; Domain; Rice; Apple
Funding
- National Science and Technology Supporting Project [2013BAD20B03]
- China Apple Research System [CARS-28]
- National Spark Plan Program [2014GA850002]
- Science and Technology Innovative Engineering Project in Shaanxi province, China [2015NY114]
- China Postdoctoral Science Foundation [2014M56806]
- Yangling Subsidiary Center Project of the National Apple Improvement Center
- Collaborative Innovation of the Center for Shaanxi Fruit Industry Development
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The study evaluated the role of TAZ domain-containing genes in response to various heavy metals in different plant genomes. The results showed that TAZ genes could trigger plant resistance against different heavy metals, and their functions were further characterized by overexpressing specific genes in Arabidopsis.
TAZ (transcriptional coactivator with PDZ-binding) zinc finger domains, also known as transcription adaptor putative zinc finger domains, that control diverse function in plant growth and development. Here, in the present study, we evaluated the role of the TAZ domain-containing gene in response to various heavy metals. Initially, we found a total of 3, 7, 8, 9, 9, 9, 7, 14, 6, 10, and 6 proteins containing TAZ domain in stiff brome, millet, sorghum, potato, pepper, maize, rice, apple, peach, pear, and tomato genome that could trigger the plant resistance against various heavy metals, respectively. Various in-silico approaches were applied such as duplication, phylogenetic analysis, and gene structure, to understand the basic features of the TAZ domain-containing genes in plants. Gene expression analyses were also performed under heavy metals (Cr, Zn, Ni, Cd, Co, Fe, Mn, and Pb). The results of quantitative real-time PCR analysis indicated that the TAZ gene family members were differentially expressed under different heavy metals. We further characterized the functions of the TAZ domain-containing gene under the heavy metal stresses by overexpressing the OsTAZ4 gene in Arabidopsis. The TAZ genes could promote plant resistance against various heavy metals by interacting with OsMYB34 and OsFHA9 transcription factors. The results will contribute to elucidate the relationship of TAZ proteins with heavy metals stresses and also ascertain the biological function in plant growth and development.
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