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Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model.
Mol Genet Genomics. 2012 Apr; 287(4):295-11.MG

Abstract

Auxin plays key roles in a wide variety of plant activities, including embryo development, leaf formation, phototropism, fruit development and root initiation and development. Auxin/indoleacetic acid (Aux/IAA) genes, encoding short-lived nuclear proteins, are key regulators in the auxin transduction pathway. But how they work is still unknown. In order to conduct a systematic analysis of this gene family in Solanaceae species, a genome-wide search for the homologues of auxin response genes was carried out. Here, 26 and 27 non redundant AUX/IAAs were identified in tomato and potato, respectively. Using tomato as a model, a comprehensive overview of SlIAA gene family is presented, including the gene structures, phylogeny, chromosome locations, conserved motifs and cis-elements in promoter sequences. A phylogenetic tree generated from alignments of the predicted protein sequences of 31 OsIAAs, 29 AtIAAs, 31 ZmIAAs, and 26 SlIAAs revealed that these IAAs were clustered into three major groups and ten subgroups. Among them, seven subgroups were present in both monocot and dicot species, which indicated that the major functional diversification within the IAA family predated the monocot/dicot divergence. In contrast, group C and some other subgroups seemed to be species-specific. Quantitative real-time PCR (qRT-PCR) analysis showed that 19 of the 26 SlIAA genes could be detected in all tomato organs/tissues, however, seven of them were specifically expressed in some of tomato tissues. The transcript abundance of 17 SlIAA genes were increased within a few hours when the seedlings were treated with exogenous IAA. However, those of other six SlIAAs were decreased. The results of stress treatments showed that most SIIAA family genes responded to at least one of the three stress treatments, however, they exhibited diverse expression levels under different abiotic stress conditions in tomato seedlings. SlIAA20, SlIAA21 and SlIAA22 were not significantly influenced by stress treatments even though at least one stress-related cis-element was identified in their promoter regions. In conclusion, our comparative analysis provides an insight into the evolution and expression patterns in various tissues and in response to auxin or stresses of the Aux/IAA family members in tomato, which will provide a very useful reference for cloning and functional analysis of each member of AUX/IAA gene family in Solanaceae crops.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Wu J
Key Laboratory of Horticultural Plant Growth, Development and Biotechnology, Agricultural Ministry of China, Department of Horticulture, Zhejiang University, 310058 Hangzhou, People’s Republic of China.
Peng Z
No affiliation info available
Liu S
No affiliation info available
He Y
No affiliation info available
Cheng L
No affiliation info available
Kong F
No affiliation info available
Wang J
No affiliation info available
Lu G
No affiliation info available

MeSH

Amino Acid SequenceGene Expression Regulation, PlantGenome-Wide Association StudyIndoleacetic AcidsLycopersicon esculentumMolecular Sequence DataPhylogenyPlant ProteinsSequence AlignmentSolanaceae

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22314799

Citation

Wu, Jian, et al. "Genome-wide Analysis of Aux/IAA Gene Family in Solanaceae Species Using Tomato as a Model." Molecular Genetics and Genomics : MGG, vol. 287, no. 4, 2012, pp. 295-11.
Wu J, Peng Z, Liu S, et al. Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model. Mol Genet Genomics. 2012;287(4):295-11.
Wu, J., Peng, Z., Liu, S., He, Y., Cheng, L., Kong, F., Wang, J., & Lu, G. (2012). Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model. Molecular Genetics and Genomics : MGG, 287(4), 295-11. https://doi.org/10.1007/s00438-012-0675-y
Wu J, et al. Genome-wide Analysis of Aux/IAA Gene Family in Solanaceae Species Using Tomato as a Model. Mol Genet Genomics. 2012;287(4):295-11. PubMed PMID: 22314799.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model. AU - Wu,Jian, AU - Peng,Zhen, AU - Liu,Songyu, AU - He,Yanjun, AU - Cheng,Lin, AU - Kong,Fuling, AU - Wang,Jie, AU - Lu,Gang, PY - 2011/10/16/received PY - 2012/01/10/accepted PY - 2012/2/9/entrez PY - 2012/2/9/pubmed PY - 2012/5/9/medline SP - 295 EP - 11 JF - Molecular genetics and genomics : MGG JO - Mol Genet Genomics VL - 287 IS - 4 N2 - Auxin plays key roles in a wide variety of plant activities, including embryo development, leaf formation, phototropism, fruit development and root initiation and development. Auxin/indoleacetic acid (Aux/IAA) genes, encoding short-lived nuclear proteins, are key regulators in the auxin transduction pathway. But how they work is still unknown. In order to conduct a systematic analysis of this gene family in Solanaceae species, a genome-wide search for the homologues of auxin response genes was carried out. Here, 26 and 27 non redundant AUX/IAAs were identified in tomato and potato, respectively. Using tomato as a model, a comprehensive overview of SlIAA gene family is presented, including the gene structures, phylogeny, chromosome locations, conserved motifs and cis-elements in promoter sequences. A phylogenetic tree generated from alignments of the predicted protein sequences of 31 OsIAAs, 29 AtIAAs, 31 ZmIAAs, and 26 SlIAAs revealed that these IAAs were clustered into three major groups and ten subgroups. Among them, seven subgroups were present in both monocot and dicot species, which indicated that the major functional diversification within the IAA family predated the monocot/dicot divergence. In contrast, group C and some other subgroups seemed to be species-specific. Quantitative real-time PCR (qRT-PCR) analysis showed that 19 of the 26 SlIAA genes could be detected in all tomato organs/tissues, however, seven of them were specifically expressed in some of tomato tissues. The transcript abundance of 17 SlIAA genes were increased within a few hours when the seedlings were treated with exogenous IAA. However, those of other six SlIAAs were decreased. The results of stress treatments showed that most SIIAA family genes responded to at least one of the three stress treatments, however, they exhibited diverse expression levels under different abiotic stress conditions in tomato seedlings. SlIAA20, SlIAA21 and SlIAA22 were not significantly influenced by stress treatments even though at least one stress-related cis-element was identified in their promoter regions. In conclusion, our comparative analysis provides an insight into the evolution and expression patterns in various tissues and in response to auxin or stresses of the Aux/IAA family members in tomato, which will provide a very useful reference for cloning and functional analysis of each member of AUX/IAA gene family in Solanaceae crops. SN - 1617-4623 UR - https://www.unboundmedicine.com/medline/citation/22314799/Genome_wide_analysis_of_Aux/IAA_gene_family_in_Solanaceae_species_using_tomato_as_a_model_ L2 - https://doi.org/10.1007/s00438-012-0675-y DB - PRIME DP - Unbound Medicine ER -