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研究根系发育能力不同的苜蓿品种在主根受到伤害时同工酶的变化规律。结果表明，主根受伤前，根系发育能力强、中和弱的无棣、陇东和北疆苜蓿，处理与对照间脂酶和超氧化物歧化酶同工酶无明显差异，根组织脂酶同工酶的酶带数多于叶片。根组织和叶片超氧化物歧化酶同工酶的酶带数相同。主根受伤后，无棣和陇东苜蓿根组织脂酶同工酶的酶带数均比对照多1个，但二者的变化方式不同。无棣苜蓿叶片脂酶同工酶的酶带数也多于对照，无棣和陇东苜蓿根组织超氧化物歧化酶同工酶的酶带数均比对照多2个，酶带出现的位置基本一致。结果表明，脂酶和超氧化物歧化酶同工酶与苜蓿侧根性状的基因表达有关。
To study the variation of isozymes in alfalfa cultivars with different root developmental ability when the main roots were damaged. The results showed that there was no significant difference in lipase and superoxide dismutase isozyme between the treatment and the control before the main root was injured, the root development ability was strong, the middle and weak were in the Wudi, Longdong and the northern Xinjiang alfalfa, Enzymes with more enzyme bands than leaves. Roots and leaves superoxide dismutase isozyme with the same number of bands. After the main root was injured, there were 1 more enzyme bands in the root tissues of alfalfa in Wudi and Longdong than in the control, but the two varied in different ways. The number of enzyme bands in the leaves of Medicago sativa was also higher than that in the control, and the number of enzyme bands of the superoxide dismutase isozyme in the root tissues of alfalfa in Wudi and Longdong were more than that of the control Basically the same. The results showed that lipase and superoxide dismutase isozymes were related to the gene expression of lateral root traits in alfalfa.