verbascum {drcte}

Germination time-course for three species of the Verbascum genus

Description

This dataset relates to a germination assay with three species of Verbascum, four replicated Petri dishes and 25 seeds per Petri dish (12 dishes in all). Inspections were made daily for 15 days.

Usage

data("verbascum")

Format

A data frame with 192 observations on the following 6 variables.

Dish

a numeric vector with the coding for Petri dishes

Species

a factor with the name of the species

timeBef

a numeric vector with the start date for the each assessment interval

timeAf

a numeric vector with the end date for the each assessment interval. It contains the value Inf (Infinity), that indicates the final interval of time, after the final assessment time

nSeeds

a numeric vector with the number of germinated seeds in each interval. Relating to final interval of time, from the last assessment date to Infinity, 'nSeeds' contains the final number of ungerminated seeds

nCum

a numeric vector with the cumulative number of germinated seeds in each interval of time

Source

Data are kindly provided by Antonietta Cristaudo (University of Catania, Italy).

References

Catara, S., Cristaudo, A., Gualtieri, A., Galesi, R., Impelluso, C., Onofri, A., 2016. Threshold temperatures for seed germination in nine species of Verbascum (Scrophulariaceae). Seed Science Research 26, 30–46.

Examples

data(verbascum)
head(verbascum)