Germination of Lettuce Seed at High Temperature Stimulated by Thiourea

Abstract

Ten strains of lettuce seed were soaked in a dilute soln. of thiourea in the dark at constant temp. The seeds were dried, stored 10 days at room temp., and tested for germination on wet filter paper in a germinator at 33[degree]-35[degree] C. The avg. germination of treated samples at this temp. was 87.2% compared with 0.88% for untreated samples of the 10 strains. When planted in soil subjected to high environ. temps., the treated seeds germinated rapidly and without abnormalities.