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Functional & Integrative Genomics

, Volume 10, Issue 4, pp 533–546 | Cite as

Auxin-related gene families in abiotic stress response in Sorghum bicolor

  • SuiKang Wang
  • YouHuang Bai
  • ChenJia Shen
  • YunRong Wu
  • SaiNa Zhang
  • DeAn Jiang
  • Tom J. Guilfoyle
  • Ming Chen
  • YanHua Qi
Original Paper

Abstract

Sorghum, a C4 model plant, has been studied to develop an understanding of the molecular mechanism of resistance to stress. The auxin-response genes, auxin/indole-3-acetic acid (Aux/IAA), auxin-response factor (ARF), Gretchen Hagen3 (GH3), small auxin-up RNAs, and lateral organ boundaries (LBD), are involved in growth/development and stress/defense responses in Arabidopsis and rice, but they have not been studied in sorghum. In the present paper, the chromosome distribution, gene duplication, promoters, intron/exon, and phylogenic relationships of Aux/IAA, ARF, GH3, and LBD genes in sorghum are presented. Furthermore, real-time PCR analysis demonstrated these genes are differently expressed in leaf/root of sorghum and indicated the expression profile of these gene families under IAA, brassinosteroid (BR), salt, and drought treatments. The SbGH3 and SbLBD genes, expressed in low level under natural condition, were highly induced by salt and drought stress consistent with their products being involved in both abiotic stresses. Three genes, SbIAA1, SbGH3-13, and SbLBD32, were highly induced under all the four treatments, IAA, BR, salt, and drought. The analysis provided new evidence for role of auxin in stress response, implied there are cross talk between auxin, BR and abiotic stress signaling pathways.

Keywords

Abiotic stress Aux/IAA ARF GH3 LBD Sorghum bicolor 

Notes

Acknowledgements

We gratefully acknowledge Ping Lu, the Institute of Crop Germplasm Resource in the Chinese academy of agricultural sciences for providing the seeds of Sorghum bicolor (L.) Moench. The research is supported by the National Natural Science Foundation of China (Grant No.30770213 and 30971743), The National High Technology Research and Development Program of China (863 Program; Grant No. 2007AA10Z188, 2007AA10Z191, and 2008AA10Z125), and the Natural Science Foundation of Zhejiang province, China (Grant No. Y3080111).

Supplementary material

10142_2010_174_MOESM1_ESM.doc (244 kb)
Supplementary S1 Analysis of the members of the five gene families Aux/IAA, ARF, GH3, LBD, and SAUR in sorghum (DOC 243 kb)
10142_2010_174_MOESM2_ESM.doc (2.2 mb)
Supplementary S2 Multiple sequence alignments (DOC 2272 kb)
10142_2010_174_MOESM3_ESM.doc (768 kb)
Supplementary S3 Phylogenetic relationship among the sorghum proteins (DOC 768 kb)
10142_2010_174_MOESM4_ESM.doc (300 kb)
Supplementary S4 Phylogenetic relationship in Arabidopsis, rice, and sorghum genome (DOC 299 kb)
10142_2010_174_MOESM5_ESM.doc (2.8 mb)
Supplementary S5 Analysis of cis-elements in promoters (DOC 2856 kb)
10142_2010_174_MOESM6_ESM.doc (154 kb)
Supplementary S6 Primer list for real-time PCR (DOC 154 kb)
10142_2010_174_MOESM7_ESM.doc (44 kb)
Supplementary S7 Real-time PCR of SbIAA, SbARF, SbGH3, and SbLBD genes in leaf and root (DOC 43 kb)
10142_2010_174_MOESM8_ESM.doc (43 kb)
Supplementary S8 Real-time PCR of SbIAA genes under IAA, BR, salt, and drought treatments (DOC 43 kb)
10142_2010_174_MOESM9_ESM.doc (42 kb)
Supplementary S9 Real-time PCR of SbARF genes under IAA, BR, salt, and drought treatments (DOC 42 kb)
10142_2010_174_MOESM10_ESM.doc (40 kb)
Supplementary S10 Real-time PCR of SbGH3 genes under IAA, BR, salt, and drought treatments (DOC 40 kb)
10142_2010_174_MOESM11_ESM.doc (45 kb)
Supplementary S11 Real-time PCR of SbLBD genes under IAA, BR, salt, and drought treatments (DOC 45 kb)

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • SuiKang Wang
    • 1
  • YouHuang Bai
    • 2
    • 3
  • ChenJia Shen
    • 1
  • YunRong Wu
    • 1
  • SaiNa Zhang
    • 1
  • DeAn Jiang
    • 1
  • Tom J. Guilfoyle
    • 4
  • Ming Chen
    • 1
    • 2
    • 3
  • YanHua Qi
    • 1
  1. 1.State Key Laboratory of Plant Physiology and Biochemistry, College of Life SciencesZhejiang UniversityZijingang Campus, HangzhouChina
  2. 2.Department of Bioinformatics, College of Life SciencesZhejiang UniversityHangzhouChina
  3. 3.James D. Watson Institute of Genome SciencesZhejiang UniversityHangzhouChina
  4. 4.Department of BiochemistryUniversity of MissouriColumbiaUSA

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