Jasmonate levels in leaves of grazed and non-grazed field-grown Arabidopsis plants. JA levels (in ng JA/mg leaf tissue) were quantified in individual plants of wild-type and npq4 genotypes, that has been grazed or not. Error bars denote ± SE.
Frenkel et al. BMC Plant Biology 2009 9:12 doi:10.1186/1471-2229-9-12