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水杨酸诱导苜蓿对霜霉病抗性的研究

Gansu Nongye Daxue xuebao(2006)

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Abstract
对陇东苜蓿、大叶苜蓿、甘农3号和关中苜蓿4个感霜霉病品种进行了水杨酸喷雾试验,研究了水杨酸对苜蓿霜霉病的诱导抗性.结果表明,陇东苜蓿的诱导抗病效果最好,诱导效果可达61.8 %,用不同浓度的SA诱导处理陇东苜蓿幼苗发现,SA诱导的最宜浓度为50 μg/μL;SA诱导处理后,苜蓿幼苗体内过氧化物酶(POD)和苯丙氨酸解氨酶(PAL)活性明显增强,POD、PAL在处理后第7 d、第5 d达到最大,分别为9.8(μ/g*hfw)和4.87(ΔOD/0.01 gfw),是对照的2.5倍和3.2倍.
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