铜绿假单胞菌防治几种杂草及其对土壤微生物的影响

Ghada S. Ibrahim
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引用次数: 0

摘要

杂草的生物防治是利用天敌将密度降低到可容忍的水平。这样做的目标不是清除杂草,而是将杂草数量减少到经济上的低水平。铜绿假单胞菌在这里用作生物防治剂。在体外作为添加物进行了两次杂草生物测定实验,与对照进行了比较。第一个实验是假单胞菌肉汤培养。结果表明,在不同处理条件下,水草(Echinochloa crus galli、Phalaris minor、Beta vulgaris L和Pennisetum purpuremum schumach Gramineae)的生长参数(长度、鲜重、干重和发芽率)显著降低(40 ~ 85%)。二是采用乙酸乙酯假单胞菌粗提物(有机提取物)。杂草生长参数降低幅度达(55 ~ 100%)。在体内,与对照相比,使用假单胞菌有机提取物,杂草生长参数显著降低,达到(21-82%)。对玉米生长参数无负面影响。他们发现杂草根部和土壤微生物之间的相互作用并不明确。它导致杂草根际微生物数量减少。除杂草后,在同一盆中栽培玉米,玉米在土壤中一个月的土壤微生物数量增加。假单胞菌有机提取物经HPLC-MS鉴定为:喹啉及其衍生物(奎宁酸、喹诺酮2-庚基-4-羟基喹诺酮- n -氧化物、3-喹啉羧酸、1-乙基- 1,4 -二氢-7-甲氧基-4-氧和喹啉二醇)。我们建议使用铜绿假单胞菌来减少杂草,特别是玉米种植和添加生物肥料。杂草根对土壤微生物的影响尚不清楚,需要进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Using to Pseudomonas aeruginosa Control some Kinds of Weeds and its Effect on Soil Microbes
Biological control of weeds is the use of natural enemies to reduce the density to a tolerable level. The target of this is not removal but the reduction of the weed population to an economically low. Pseudomonas aeruginosa used here as bio control agent. In vitro, used as addition in two bioassay experiments on weeds compared to control. First experiment was using Pseudomonas broth culture. As results, there was significant reduction reached to (40–85%) in growth parameters (lengths, fresh & dry weights and germination %) of weeds ( Echinochloa crus galli , Phalaris minor , Beta vulgaris L and Pennisetum purpuremum schumach Gramineae ). The second experiment was using Pseudomonas ethyl acetate crude extract (organic extract). There were reductions in weeds growth parameters reached to (55-100%). In vivo, using Pseudomonas organic extract compared to control, there were significant reductions of weeds growth parameters reached to (21-82%). There was no negative effect on Zea mays growth parameters. There found unclear interactions between weed roots and soil microbes. It caused reductions in weeds rhizosphere microbes' counts. After weeds removed and Maize cultivated in same pots, soil microbes' counts increased during a month of Maize life in soil. Pseudomonas organic extract was identified by HPLC-MS to: Quinoline and Quinoline derivatives (Quinic acid, Quinolone 2-heptyl-4-hydroxyquinolone-N-oxide, 3-Quinolinecarboxylic acid, 1-ethyl-1, 4-dihydro-7-methoxy-4-oxo-and Quinolinediol. We recommend use Pseudomonas aeruginosa to reduce weeds especially with Zea mays cultivation and add biofertilizers. Effect of weed roots on soil microorganisms is unclear and needs more future studies.
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