Biphasic Fluence Response Curves for Induction of Seed Germination

Abstract
Fluence-response curves for the induction of seed germination after 24 hours pretreatment at 35°C of Rumex obtusifolius and Arabidopsis thaliana show two phases of response: (a) a very low fluence-response (10−4 - 10−1 micromoles per square meter) and (b) a low fluence-response (1 - 103 micromoles per square meter).