Leaf mustard plants

The frequency of genes for the absence of erucic acid in rape, turnip rape, and other closely related species appears to be very low. If seed oils low in erucic acid content were available within leaf mustard (Brassica juncea) this species, now grown for edible oil in India and China, could become an edible oil crop in other countries. Efforts to find genes for the absence of erucic acid in this species have been under way for a number of years in several countries, and individual plants from 8. juncea which produce seed oils essentially free from erucic acid have been isolated recently (Kirk and Oram, 1981). 

Inhibitory potency (%) against the growth of plants in the greenhouse, 0 (no effect), 100 % (completely kill) Brj leaf mustard Amr common amaranth Eel white eclipta... 

Leaf Disc Fluorescence. Discs or leaf pieces approximately 10 mm in diameter were cut from recently unfolded soybean trifoliates or fully expanded mustard leaves. Inhibitor stock solutions were prepared in acetone. Discs were floated abaxial side downward in solutions containing water, 0.3% acetone, 0.05% Tween 20, and 10 pM atrazine, diuron or LY181977. After 150 min. incubation, each disc was removed from the soaking solution, blotted dry and the adaxial side of the disc was placed under the probe of a Model SF-20 Brancker Plant Productivity Fluorometer for 10 s in the dark followed by 10 s of illumination. 

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