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J Chem Ecol

Title:		"Herbivores, vascular pathways, and systemic induction: facts and artifacts"
Author(s):		Orians C;
Address:		"Department of Biology, Tufts University, Medford, MA 02155, USA. Colin.Orians@Tufts.edu"
Journal Title:		J Chem Ecol
Year:		2005
Volume:		20050928
Issue:		10
Page Number:		2231 - 2242
DOI:		10.1007/s10886-005-7099-7
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"Over the past 10 years there has been tremendous growth in our understanding of molecular, chemical, and morphological induction of traits involved in the resistance of plants to herbivores. Although it is well established that the patterns of induction can be constrained by a plant's vascular architecture, studies often fail to account for these constraints. Failure to do so has the potential to severely underestimate both the patterns and extent of induction. Here I review (1) the evidence for vascular control of induced responses, (2) how interspecific variation in phyllotaxy influences spatial patterning of induction, (3) the factors, phloem transport and volatile production, that may break down vascular constraints and lead to more widespread induction, and (4) the experimental approaches that could be compromised when vascular architecture is not considered. I show that vascular constraints in systemic induction are commonplace, but vary among species. I suggest that when induction is more widespread than expected from patterns of phyllotaxy, differences in vascular connectivity and volatile production may be responsible. I argue that advances in the mechanisms of systemic induction, cross-talk between different signal transduction pathways, specificity of induction, costs and benefits of systemic induction, and the effects of induced changes on herbivores and their natural enemies require that experiments be designed to examine and/or control for vascular constraints in systemic induction"
Keywords:		"Animals *Ecosystem Feeding Behavior/*physiology Gene Expression Regulation, Plant/physiology *Plant Development Plant Diseases Plant Leaves/*chemistry *Plant Physiological Phenomena Plants/genetics/microbiology Signal Transduction/genetics;"
Notes:		"MedlineOrians, Colin eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Review 2005/10/01 J Chem Ecol. 2005 Oct; 31(10):2231-42. doi: 10.1007/s10886-005-7099-7. Epub 2005 Sep 28"