Table 2.

Identification of Leaf-Fed Deuterated GA4 in Arabidopsis Shoot Apices

SampleRatio (m/z 420→392)/(m/z 418→390)
Nonlabeled GA4 standard0.13
Shoot apices in 2H2-GA4 leaf-fed plants0.21
  • 2H2-GA4 transport was detected by measuring endogenous and labeled GA4 in apex samples and GA4 standards with GC-MS in selected reaction monitoring mode and comparing the ratio of endogenous and labeled GA4 in the sample and GA4 standard. m/z, mass-to-charge ratio.