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Figure 2. Effect of 2-hydroxy-6-(10-hydroxypentadec-11-enyl)benzoic acid (HHPEBA) on coleoptile and root growth of ryegrass seedlings. Ryegrass seeds were incubated in aqueous solution of HHPEBA for 48 d, and the length of coleoptiles and roots of ryegrass seedlings were measured as described previously.2 Inhibition % was then determined as described in Figure 1.
