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首页> 外文期刊>Journal of Soil Science and Environmental Management >Performance studies of free-living tomato (Lycopersicon exculentum L.) rhizospheric Bacillus for their multiple plant growth promoting activity
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Performance studies of free-living tomato (Lycopersicon exculentum L.) rhizospheric Bacillus for their multiple plant growth promoting activity

机译：自由生活番茄（Lycopersicon exculentum L.）根际芽孢杆菌对多种植物生长的促进作用

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The present investigation is based on the study of the diversity of?Bacillus?spp. isolated from tomato rhizosphere and their evaluation as plant growth promoter. A total of twenty eight rhizospheric gram positive rod-shaped bacteria (DPNSB-1 to DPNSB-28) were isolated on nutrient agar and confirmed as?Bacillus?spp. on the basis of phenotypic characterization. Carbon source utilization pattern based on BIOLOG and 16S rDNA-RFLP analysis of these isolates using three tetra cutter restriction enzymes (AluI,?HaeIII and?MspI) was employed for diversity studies. All the 28 strains deliberated with multiple plant growth promotion (PGP) attributes such as production of Indole acetic acid (IAA), siderophore, ammonia, HCN and phosphate solubilization. The diversity pattern followed amongst isolates was based on carbon utilization profiling, which revealed 9 distinct clusters ranging from 10 to 50%, whereas RFLP based resulted into pattern 5 determined distinct clusters with a range of 10 to 70%. However, all the isolates were endowed with variable range of PGP activities. Among them, DPNSB-2, DPNSB-11 and DPNSB-28 produced significant levels of IAA production 503.65, 687.94 and 845.28 μg mg-1?respectively. While 19 (67%) isolates were capable of solubilizing phosphate, 13 (46%) isolates produced siderophore, 21 (75%) isolates produced Ammonia and 20 (71%) were produced HCN. The positive isolates appeared attractive for exploring their plant growth- promoting activity and may be useful for control of?Fusarium?wilt in tomato field.
机译：本研究基于对芽孢杆菌属物种的多样性的研究。从番茄根际中分离得到，并作为植物生长促进剂进行评估。在营养琼脂上分离出总共二十八根根际革兰氏阳性杆状细菌（DPNSB-1至DPNSB-28），并确认为杆状芽孢杆菌。在表型表征的基础上。基于BIOLOG和16S rDNA-RFLP分析这些分离物的碳源利用模式，使用三种四刀限制酶（AluI，？HaeIII和？MspI）进行多样性研究。所有28个菌株均具有多种植物生长促进（PGP）特性，例如吲哚乙酸（IAA），铁载体，氨水，HCN和磷酸盐增溶的生产。分离物之间遵循的多样性模式是基于碳利用谱，揭示了9个不同的簇，范围从10％到50％，而基于RFLP的模式则是5个确定的不同簇，范围在10％到70％之间。但是，所有分离株都具有不同范围的PGP活性。其中，DPNSB-2，DPNSB-11和DPNSB-28分别产生显着水平的IAA产量503.65、687.94和845.28μgmg-1？尽管有19种（67％）分离物能够溶解磷酸盐，但有13种（46％）分离物产生了铁载体，有21种（75％）分离物产生了氨，有20种（71％）产生了六氯化萘。阳性分离株对于探索其促进植物生长的活性似乎具有吸引力，并且可能对控制番茄田中的枯萎病有用。

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