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对三叶草接种AM真菌根内球囊霉,用盆栽试验和分根试验测定根系的菌根侵染率和抗氧化酶活性,研究AM真菌对根系抗氧化酶活性的影响以及该影响的系统性。结果表明,盆栽试验中接种根内球囊霉显著提高了根系中SOD、POD、CAT的活性,表明AM真菌可以促进根系的抗氧化酶活性;分根试验中一半根系接种了根内球囊霉的植株,其另一半未接种的根系SOD、POD活性也增加,表明AM真菌对根系抗氧化酶系统的促进具有系统效应。由于抗氧化酶系统是植物产生抗逆性的生理生化基础,可以推测,AM真菌对根系抗氧化酶活性的系统性提高有助于保护根系整体,而非仅仅保护受侵染根段。
The inoculation with AM fungi inoculated with clover in clover, the mycorrhizal infection rate and antioxidant enzyme activity of root system were determined by pot experiment and root-branch test. The effects of AM fungi on antioxidant enzyme activity of root system and the systemicity of the effect were systematically studied. The results showed that inoculation with P. globosum in pot experiment significantly increased the activities of SOD, POD and CAT in root system, indicating that AM fungi can promote the antioxidant enzyme activity of root system; , While the activities of SOD and POD in the other unoccupied roots also increased, indicating that AM fungi had a systemic effect on the promotion of root antioxidant enzyme system. As the antioxidant enzyme system is the physiological and biochemical basis for plants to produce stress resistance, it can be speculated that the systemic improvement of root antioxidant enzyme activity by AM fungi helps to protect the whole root system, not just the infected roots.