Characterization of DWARF14 Genes in Populus
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Northeast Normal Univ., Changchun (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education
- Univ. of Tennessee, Knoxville, TN (United States). Department of Biochemistry and Cellular and Molecular Biology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. for Biological Sciences
- Northeast Normal Univ., Changchun (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education; Univ. of Tennessee, Knoxville, TN (United States). Genome Science and Technology Program
We report that strigolactones are a new class of plant hormones regulating shoot branching and symbiotic interactions with arbuscular mycorrhizal fungi. Studies of branching mutants in herbaceous plants have identified several key genes involved in strigolactone biosynthesis or signaling. The strigolactone signal is perceived by a member of the α/β-fold hydrolase superfamily, known as DWARF14 (D14). However, little is known about D14 genes in the woody perennial plants. Here we report the identification of D14 homologs in the model woody plant Populus trichocarpa. We showed that there are two D14 homologs in P. trichocarpa, designated as PtD14a and PtD14b that are over 95% similar at the amino acid level. Expression analysis indicated that the transcript level of PtD14a is generally more abundant than that of PtD14b. However, only PtD14a was able to complement Arabidopsis d14 mutants, suggesting that PtD14a is the functional D14 ortholog. Amino acid alignment and structural modeling revealed substitutions of several highly conserved amino acids in the PtD14b protein including a phenylalanine near the catalytic triad of D14 proteins. In conclusion, this study lays a foundation for further characterization of strigolactone pathway and its functions in the woody perennial plants.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Chinese Academy of Sciences (CAS)
- Grant/Contract Number:
- AC05-00OR22725; 201019
- OSTI ID:
- 1259854
- Alternate ID(s):
- OSTI ID: 1311227
- Journal Information:
- Scientific Reports, Vol. 6; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Strigolactone defective mutants of Arabidopsis exhibit delayed sepal senescence | preprint | January 2020 |
Does Drought Stress on Seedlings Have Longer Term Effects on Sapling Phenology, Reshooting, Growth and Plant Architecture in Quercus robur, Q. petraea and Their Morphological Intermediates?
|
journal | November 2019 |
Perception and Signaling of Strigolactones
|
journal | August 2016 |
Strigolactones in an experimental context
|
journal | May 2019 |
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