milkweedData: Milkweed Chemical Defense Data

Description Usage Format Source Examples

Description

The milkweed (Asclepius syriaca) chemical defense data, milkweedData, has concentrations for 12 cardenolides from multiple tissues and plants with and without evidence of herbivorous weevil damage. These correspond to the milkweedVars dataframe, which contains the plant variables.

Usage

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	data("milkweedData")
	data("milkweedVars")
	

Format

milkweedData is a data frame with 101 observations of concentrations (μg per 0.1 g dry wt) for 12 cardenolides. Column names indicate the HPLC retention times for each compound (earlier RTs are more polar).

milkweedVars is a dataframe of 101 observations on the following 4 variables:

tissue

a character vector of five tissues analyzed: cortex, epidermis, leaf, pith, and vascular tissue

PlantID

a character vector of unique plant IDs

infectstatus

a character vector identifying whether a plant had weevil oviposition damage (D) or was undamaged (U)

total

a character vector indicating the highest hierarchical level

Source

Fordyce, J.A. and S.B. Malcolm (2000). Specialist weevil, Rhyssomatus lineaticollis, does not spatially avoid cardenolide defenses of common milkweed by oviposition into pith tissue. J. Chem. Ecol.. 26(12):2857–2874.

Examples

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