Cited by 75Plant Molecular Biology ResearchWheat and Barley Genetics and PathologyPlant Parasitism and Resistance

Overexpression of the maize Teosinte Branched1 gene in wheat suppresses tiller development

Lewis, Janet M., Mackintosh, Caroline A., Shin, Sanghyun, Gilding, Edward, Kravchenko, Sasha, Baldridge, Gerald, Zeyen, Richard, Muehlbauer, Gary J.·2008·Plant Cell Reports

Abstract

The number of viable shoots influences the overall architecture and productivity of wheat (Triticum aestivum L.). The development of lateral branches, or tillers, largely determines the resultant canopy. Tillers develop from the outgrowth of axillary buds, which form in leaf axils at the crown of the plant. Tiller number can be reduced if axillary buds are not formed or if the outgrowth of these buds is restricted. The teosinte branched1 (tb1) gene in maize, and homologs in rice and Arabidopsis, genetically regulate vegetative branching. In maize, increased expression of the tb1 gene restricts the outgrowth of axillary buds into lateral branches. In this study, the maize tb1 gene was introduced through transformation into the wheat cultivar "Bobwhite" to determine the effect of tb1 overexpression on wheat shoot architecture. Examination of multiple generations of plants reveals that tb1 overexpression in wheat results in reduced tiller and spike number. In addition, the number of spikelets on the spike and leaf number were significantly greater in tb1-expressing plants, and the height of these plants was also reduced. These data reveal that the function of the tb1 gene and genetic regulation of lateral branching via the tb1 mode of action is conserved between wheat, rice, maize and Arabidopsis. Thus, the tb1 gene can be used to alter plant architecture in agriculturally important crops like wheat.

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Crossref · 10.1007/s00299-008-0543-8

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  • Expression of maize TB1 in wheat or OsTB1 in rice did not decrease plant growth but specifically affected outgrowth of axillary buds.

    “Expression of maize TB1 in wheat from its native maize promoter (Lewis et al., 2008) or OsTB1 in rice using the strong and constitutive rice actin promoter (Takeda et al., 2003) did not decrease plant growth but specifically affected outgrowth of axillary buds.”

    From Shaping plant architecture (2015) · cites this paper as Lewis et al., 2008

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Authors
Lewis, J. M., Mackintosh, C. A., Shin, S., Gilding, E., Kravchenko, S., Baldridge, G., Zeyen, R., & Muehlbauer, G. J.
Affiliations
  • University of Minnesota (US)
  • Michigan State University (US)
Corresponding author
Muehlbauer, Gary J.
Venue
Plant Cell Reports
Published
2008-04-05
Volume
27
Issue
7
Pages
1217-1225
ISSN
  • 0721-7714 (ISSN-L)
  • 1432-203X
OpenAlex
W1993890452
Cited by
75
References
33
Citations by year
2026: 3 · 2025: 5 · 2024: 4 · 2023: 2 · 2022: 8 · 2021: 2 · 2020: 7 · 2019: 3 · 2018: 8 · 2017: 4 · 2016: 5 · 2015: 4 · 2014: 4 · 2013: 1 · 2012: 2
FWCI
5.24
Type
journal article
Language
en
Open access
closed
Locations
  • Plant Cell Reports (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Wheat and Barley Genetics and Pathology
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
Keywords
TEOSINTE BRANCHED1, wheat, tiller development, axillary bud outgrowth, plant architecture, transgenic overexpression, spike number, spikelet number, leaf number, plant height, gene function conservation
MeSH terms
Zea mays, Phenotype, Triticum, Blotting, Southern, Genes, Plant, Gene Expression Regulation, Plant, Plant Leaves, Meristem, Plant Shoots, Reverse Transcriptase Polymerase Chain Reaction, Plants, Genetically Modified, Flowers

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