Hussey R S, Barker K R
J Nematol. 1976 Jan;8(1):48-52.
The influence of nematodes on nodulation of soybean varied according to their modes of parasitism. In the greenhouse, nodule formation was stimulated by the endoparasites, Meloidogyne hapla and Pratylenchus penetrans, but was inhibited slightly by the ectoparasite, Belonolaimus longicaudatus. In an experiment under controlled conditions in a phytotron, Heterodera glycines severely inhibited nodule formation, whereas plants inoculated with B. longicaudatus and P. penetrans had more nodules per g root than nematode-free plants. Nitrogen-fixing capacity, however, was inhibited by all three nematode species. Different light sources used in the phytotron experiment also influenced growth and nodulation of soybean. A fluorescent plus incandescent light regime resulted in plants with the greatest shoot weight, pod number, and nodules per g root. Plants grown under Lucalox lamps had excessive stem elongation.
线虫对大豆结瘤的影响因其寄生方式而异。在温室中，内寄生线虫北方根结线虫和穿刺短体线虫刺激了根瘤形成，但外寄生线虫长针线虫对其有轻微抑制作用。在人工气候箱控制条件下进行的一项实验中，大豆胞囊线虫严重抑制了根瘤形成，而接种长针线虫和穿刺短体线虫的植株每克根上的根瘤数比未接种线虫的植株更多。然而，这三种线虫均抑制了固氮能力。人工气候箱实验中使用的不同光源也影响了大豆的生长和结瘤。荧光灯加白炽灯的光照条件下生长的植株地上部重量、荚果数和每克根上的根瘤数最多。在卤钨灯下生长的植株茎过度伸长。
