The University of Arizona
Trichomes Overview  
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Introduction of Proposal (first paragraph): Secretory and grandular trichomes (SGTs) populate the aerial surfaces of approximately 30% of all vascular plant speciess. These uni- and multi-cellular appendages are proposed to play a critical role in plant protection against various biotic and abiotic stresses including herbivore attack, pathogen infection, extreme temperature, and excessive light. One of the most remarkable features of SGTs is their capacity to synthesize, store, and secrete large amounts of secondary metabolites. Because they are not essential for plant viability, SGTs provide a unique opportunity to study complex and specialized metabolic pathways that operate within the confines of a simple and highly accessible developmental structure. It is noteworthy that many trichome-borne compounds have significant commercial value as pharmaceuticals, fragrances, food additives, and natural pesticides.

From Luckwill's taxonomic survey (1943)
Type Ilong multicellular stacksmall vesicle at the tip
Type IVshorter multicellular stalksmall gland at the tip
TYpe VIshort multicellular stalk4-celled glandular head
Type VIIunicellular stalkmulticellular head

Relevant Links
Wikipedia links: S.lycopersium, S.pimpinellifolium (the rest are not in wiki)
Resources at Cornell: SOL Genomics Network (SGN), Tomato Sequencing, Tomato Mutants
Trichome resources: Wiki, Basil Trichome ESTs

Email Comments To: pave@agcol.arizona.edu
Last Modified Friday December 19, 2008 17:37 PM and 30 seconds