摘要
2001年和2012年分别用不同浓度2.4-D+Frankia菌悬液灌注小麦、水稻、玉米、黄秋葵和小决明等植物根系,结果这些植物根系都产生了不同数量的结瘤,其中小决明和黄秋葵结瘤率最高,其值分别为80.0%和42.8%;小决明根瘤固氮酶活性和游离Frankia菌固氮活力也明显提高,分别相当于沙棘根糵苗根的71.79%和70.51%,这可能与小决明属于豆科植物以及根瘤内已有内共生的Frankia菌有关。相差12年的两次试验结果表明,Frankia菌是一种耐储、广普型菌,2.4-D是一种有效的诱导Frankia菌和宿主共生结瘤信息化物——结瘤因子。人工培养的Frankia菌可以提高植物自身固氮能力。
Which the plant roots of wheat, paddy rice, corn, okra, small semen cassiae, and so on were irrigated with different density liquid of 2,4-D＋the Frankia bacteria in 2001 and 2012 respectively made all different amount root nodulation, among them small semen cassiae （80%） and okra（42.8%） have the highest nodular rate. The nitrogenase activity of root nodulation and nitrogen-faxing activity of free Frankia bacteria were also obviously raised, equal to 71.79% and 70.51% of root system of sea- buckthorn root-seedlings, which have relevant to small semen cassiae belong probably to a leguminous plants and have already had inside the Frankia bacteria of the interior symbiosis. Two tests interval of 12 years show Frankia bacteria is a kind of resistant and wide application bacteria. 2.4 D is a kind of nodular factor which effective induces the nodular information compound between Frankia bacteria and host symbiotic. Man-made Frankia bacteria can improve nitrogen faxing ability by itself
