Evidence that heavy grazing may promote the germination of Lolium multiflorum seeds via phytochrome-mediated perception of high red/far-red ratios

摘要: 1. Field and laboratory experiments were conducted to test the hypothesis that heavy grazing promotes Lolium multiflorum seed germination at least partially via phytochrome perception of red (R)/far-red (FR) ratios. 2. The crucial with «field seeds», in contrast most previous work this area which used only dry-stored seeds. 3. Germination was promoted by severe canopy defoliation even absence animal treading, preventing canopy-filtered light from reaching seeds exposed a R pulse subsequently placed bottom natural sward (in experiments) pulses perceived