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Secretory and glandular trichomes (SGTs) are found on the surfaces of above ground plant tissues of approximately one third of all vascular plant species. Humans are familiar with these structures because they contain the essential oils that give cooking herbs their distinctive smell and taste. In addition to making foods taste better, these uni- and multi-cellular appendages are proposed to play a critical role in plant protection against various environmental stresses including herbivore attack, pathogen infection, extreme temperature, and excessive light.
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Related research:
Scientists at the Noble Foundation recently published a description of their TrichOME comparative 'omics database.
For past news click here.
Summer Internships Available:
The fifth annual Plant Genomics @ Michigan State University Summer Undergraduate Research Program is accepting applications for summer of 2010 (until 12 March 2010). For information click here. To download the application click here.
Updated 01/25
Recent publications from the project:
In press, open access:
Schilmiller, A.L*., F. Shi*, J. Kim, A.L. Charbonneau, D. Holmes, A.D. Jones, R.L. Last. 2010. Mass spectrometry screening reveals widespread diversity in trichome specialized metabolites of tomato chromosomal substitution lines. Plant J. In Press; doi: 10.111/j.1365-313X.2010.04154.x. Preprint and Supplementary Table 1.
Open Access: Kang, J.-H., F. Shi, A.D. Jones, M.D. Marks and G.A. Howe. 2009. Distortion of trichome morphology by the hairless mutation of tomato affects leaf surface chemistry. J. Exp. Bot. doi:10.1093/jxb/erp370.
Schilmiller*, A.L., I. Schauvinhold*, M. Larson, R. Xu, A.L. Charbonneau, A. Schmidt, R.L. Last and E. Pichersky 2009. Monoterpenes in the glandular trichomes of tomato are synthesized via a neryl diphosphate intermediate rather than geranayl diphosphate. Proc. Natl. Acad. Sci. U.S.A., 106:10865-10870.
To read this paper click
here.
To read a commentary on this article by J. Bohlmann and J. Gershenzon click here.
Schilmiller, A.L., R.L. Last and E. Pichersky. 2008. Harnessing plant trichome biochemistry for the production of useful compounds. Plant J. 54:702-711.
To read this paper click here.
DellaPenna, D and R.L. Last 2008. The expanding universe of genomics enabled plant biochemistry. Science. 320:479-481.
To read this paper click here.
For past news click here
2.3 Million project EST sequences available
in GenBank.
454 ESTs:
ESTs of total trichomes of S. lycopersicum LA3475 (M82 cultivated tomato) are available as experiment SRX004021.
ESTs of type VI glands of S. lycopersicum LA3475 (M82 cultivated tomato) are available as experiment SRX004022.
ESTs of total trichomes of S. pennellii LA0716 are available as experiment SRX011590.
ESTs of total trichomes of S. habrochaites LA1777 are available as experiment SRX011591.
ESTs of type VI glands of S. habrochaites LA1777 are available as experiment SRX011592.
ESTs of type VI glands of S. pimpinellifolium LA1589 are available as experiment SRX011593.
ESTs of type VI glands of S. arcanum LA1708 are available as experiment SRX011594.
Sanger ESTs:
A total of 26,000 Sanger EST sequences from the project are available from GenBank. These are from S. habrochaites PI126449 type VI glands, S. habrochaites LA1777 types I and IV glands, S. lycopersicum LA3475 types I and VII and S. pennellii LA0716 types IV and VI glands.
Computer assembled consensus assemblies for these trichome ESTs are available for search here. Note that these contigs have not been assessed by human annotation or experimentally validated.
Many thanks to Matt Larson (MSU RTSF and project member) for analysis and submission of these data.
The Solanum Trichome Project is a collaborative functional genomics project funded by a National Science Foundation grant to Michigan State University, The University of Michigan and The University of Arizona. Did you find a bug or an error? Please let us know.
