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显微观察表明，不同水稻（ Ｏｒｙｚａ ｓａｔｉｖｅ）品种对接种根瘤菌的效应不同．１７ 个品种间 Ｓ Ｔ Ｌ Ｒ 形成差异较大；不同菌株所诱导的 Ｓ Ｔ Ｌ Ｒ 形成率也有所不同．由茎瘤固氮根瘤菌（ Ａｚｏｒｈｉｚｏｂｉｕｍ ｃａｕｌｉｎｏｄｉａｎｓ） Ｏ Ｒ Ｓ ５７１所诱导的多系１ 号、福田糯和 Ｏ Ｓ４ ３ 个品种 Ｓ Ｔ Ｌ Ｒ 形成率较高（７０％ ～１００％ ），具有一定的固氮酶活性（６２．９～７０．７ ｎｍ ｏｌ·株－ １·ｄ－ １）．电镜观察表明， Ｓ Ｔ Ｌ Ｒ 细胞内有数量众多的根瘤菌菌体．本文还简要讨论了筛选水稻与根瘤菌最佳组合及 Ｓ Ｔ Ｌ Ｒ 成为稻／菌共生组织的可能性．
Microscopic observations showed that different rice (Oryza sative) varieties had different effects on rhizobia. There were significant differences in the formation of S T L R among 17 cultivars. The incidence of S T L R induced by different strains was also different. The formation rate of S T L R of the three strains of Duoyuan 1, Futian waxy and O S4 induced by Azorhizobium caulinodians O R S 571 was high (70% -100%) with a certain nitrogen fixation Enzyme activity (62.9 ~ 70.7 nm ol · -1 d -1). Electron microscopy showed that a large number of Rhizobial bacteria in S T L R cells. This article also briefly discusses the possibility of screening the best combination of rice and rhizobia and making S T L R rice / bacterial symbiosis.