Seed Germination Responses of Some Verbascum L. Species to Different Cold-Wet Pre-Treatments and Photoperiod Processes

Abstract

Seed germination responses of six Verbascum L. species to different cold-wet pre-treatments and photoperiod processes were examined. V. dudleyanum, V. natolicum, V. serratifolium and V. suworowianum var. suworowianum had the highest germination percentage at 22 degrees C fixed temperature, 8 h light/16 h dark photoperiod application after ten-day long cold-wet pre-treatment. V. orientale had the highest germination percentage at 8 hrs light/16 highest germination percentage at 16 hrs light/8 hrs dark photoperiod application after ten-day long cold-wet pre-treatment.