Rhizobacteria cooperative effect against Meloidogyne javanica in rhizosphere of legume seedlings

Q3 Agricultural and Biological Sciences
F. Tabatabaei, A. Saeedizadeh
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引用次数: 15

Abstract

Summary Root-knot nematodes are major pests of legume fields in Iran. This research evaluated the effect of Rhizobium leguminosarum bv. phaseoli and Pseudomonas fluorescens CHA0 (stand alone and combination treatment) on galling and reproduction of root-knot nematode, Meloidogyne javanica, in legum (chickpea, bean, lentil, pea) seedling rhizosphere, and the growth properties of the host plants. The legumes seeds were sown in 1kg sterilized sandy loam soil. Inocula were 5 J2/g of soil, in the case of the nematode, while considering the bacteria 1×107 cfu/kg soil. A treatment of nematicide (cadusafos) was performed, as a commonly used nematicide in Iran, at 2g/kg soil. Two months after inoculation, the following parameters were recorded: the number of knots, egg masses and reproduction factor of the nematode, bacterial nodules per root, and growth properties of seedlings in the treatments (control, nematode, nematode+nematicide, and nematode+rhizobacteria). The greatest bacterial effect on the control of the nematode was observed in the rhizosphere of the bean treatments. Inoculation with Rhizobium in the soil decreased the galling on the legumes’ roots, and the combined inoculation with Pseudomonas and Rhizobium resulted in a higher decrease of the galling.
豆科植物幼苗根际根瘤菌对爪哇曲线虫的协同作用
根结线虫是伊朗豆科作物的主要害虫。本研究评价了豆科根瘤菌的抑菌效果。研究了相绿单胞菌和荧光假单胞菌CHA0(单独和联合处理)对豆科植物(鹰嘴豆、蚕豆、扁豆、豌豆)根际根结线虫侵染繁殖及寄主植物生长特性的影响。将豆科植物种子播种在1kg消毒过的沙质壤土中。接种量为5 J2/g土壤,以线虫为例,考虑细菌为1×107 cfu/kg土壤。将杀线虫剂(cadusafos)作为伊朗常用的杀线虫剂,按2g/kg土壤进行处理。接种2个月后,记录不同处理(对照、线虫、线虫+杀线虫剂、线虫+根杆菌)下线虫结数、虫卵数、繁殖因子、每根细菌结数、幼苗生长特性。细菌对线虫的控制效果最大的是在豆类处理的根际。土壤中接种根瘤菌可减少豆科植物根系的剥落,其中假单胞菌和根瘤菌联合接种对根瘤菌剥落的影响更大。
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来源期刊
Hellenic Plant Protection Journal
Hellenic Plant Protection Journal Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
1.50
自引率
0.00%
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