Effect of Daylength on the Ability of Salicylic Acid to Induce Flowering in the Long-day Plant Lemna gibba G3 and the Short-day Plant Lemna paucicostata 6746

AUTOR(ES)

Cleland, Charles F.

RESUMO

When the long-day plant Lemna gibba L., strain G3 is grown on control medium the critical daylength is just under 10 hours. With 3.2 micromolar salicylic acid added to the medium substantial flower promotion is obtained on 9-, 10-, and 11-hour daylengths. On an 8-hour daylength salicylic acid treatment results in only a very small flowering response, and with daylengths less than 8 hours flowering is never obtained. Thus, salicylic acid treatment causes a shift in the critical daylength of about 2 hours, from just under 10 hours to just under 8 hours.

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