Acinetobacter不动杆菌属

不动杆菌属学名Acinetobacter)为假单胞菌目莫拉氏菌科的一好氧或兼性厌氧发酵型革兰氏阴性杆菌。杆状菌。广泛存在于自然界的土壤、水和污物中。此属的模式种为乙酸钙不动杆菌(Acinetobacter calcoaceticus)。

1、NEW Bing 的回答

根际微生物群落中的Acinetobacter是一种革兰氏阴性的细菌属,属于拟杆菌门,广泛分布在土壤、水体和植物根际中。Acinetobacter对植物有以下几种作用:

综上所述,Acinetobacter是一种对植物有益的根际微生物,它能够降解有机污染物、促进植物生长和抑制植物病原菌。

2、Chat GPT的回答

根际微生物群落中的 Acinetobacter 可以发挥多种作用,但其作用通常较为复杂,不同的 Acinetobacter 物种和菌株可能对植物产生不同的影响。以下是 Acinetobacter 可能对植物产生的一些作用:

  1. 有机物降解:一些 Acinetobacter 物种具有分解有机物的能力,包括分解废弃物和有机化合物。它们有助于改善土壤质地并提供植物所需的养分。

  2. 生防作用:一些 Acinetobacter 菌株可能产生抗生素或抑制植物病原体的生长的化合物,从而有助于保护植物免受根际病害的侵害。

  3. 益生作用:一些 Acinetobacter 菌株可以与植物根系建立益生关系,通过促进植物生长和健康来提供利益。

  4. 氮循环:Acinetobacter 细菌可以参与土壤中氮的循环,包括氮的硝化和反硝化过程,有助于提供植物所需的氮源。

  5. 抵抗逆境:一些 Acinetobacter 物种具有适应能力,可以帮助植物对抗逆境条件,如干旱、盐碱地或污染土壤中的重金属。

  6. 阶段性互惠作用:不同的 Acinetobacter 物种和菌株可能在不同的生长阶段对植物产生不同的作用。例如,一些物种可能在植物幼苗阶段有益,而其他物种可能在植物成熟阶段更有益。

需要注意的是,Acinetobacter 物种的确切作用因物种和环境条件而异。因此,在研究和应用中,通常需要具体考虑 Acinetobacter 物种的种类和其与植物的相互作用,以更好地理解其在特定生态系统中的角色。此外,由于 Acinetobacter 中存在多样性,其作用也可能因具体的 Acinetobacter 菌株而异。

3、Acinetobacter sp. SG-5 inoculation alleviates cadmium toxicity in differentially Cd tolerant maize cultivars as deciphered by improved physio-biochemical attributes, antioxidants and nutrient physiology

接种不动杆菌SG-5可通过改善玉米耐镉品种的生理生化特性、抗氧化剂和营养生理来减轻镉中毒

Cadmium is a phytotoxic metal which threatens the global food safety owing to its higher retention rates and
non-biodegradable nature. Optimal study of microbe-assisted bioremediation is a potential way to minimize the
adversities of Cd on plants. Current study was aimed to isolate, identify and characterize Cd tolerant PGPBs from
industrially contaminated soil and to evaluate the potential of plant-microbe synergy for the growth augmen­
tation and Cd remediation. The Acinetobacter sp. SG-5, identified through 16S rRNA gene sequence analysis, was
able to tolerate 1000 mg/l of applied Cd stress and ability of in vitro indole-3-acetic acid production, phosphate
solubilization, as well as 1-aminocyclopropane-1-carboxylic acid deaminase activity. A Petri plate experiment
was designed to investigate the impact of Acinetobacter sp. SG-5 on applied Cd toxicity (0, 6, 12, 18, 24, 30 μM) in
maize cultivars (3062-Cd tolerant, 31P41–Cd susceptible). Results revealed that non-inoculated maize plants
were drastically affected with applied Cd treatments for growth, antioxidants and mineral ions acquisition
predominantly in susceptible cultivar (31P41). PGPB inoculation positively influenced the maize growth by
enhanced anti-oxidative potential coupled with optimum level of nutrients (K, Ca, Mg, Zn). Analysis of morpho-
physio-biochemical traits after PGPB application revealed that substantial Cd tolerance was acquired by sus­
ceptible cv. 31P41 than tolerant cv. 3062 under applied Cd regimes. Research outcomes may be important for
understanding the growth responses of Cd susceptible and tolerant maize cultivars under Acinetobacter sp. SG-5
inoculation and likely to provide efficient approaches to reduce Cd retention in edible plant parts and/or Cd
bioremediation.

镉是一种植物毒性金属,因其较高的保留率和不可生物降解性而威胁着全球食品安全。微生物辅助生物修复的优化研究是最大限度地减少镉对植物危害的潜在途径。本研究旨在从工业污染土壤中分离、鉴定和表征耐镉的PGPBs,并评价植物-微生物协同增效促进生长和Cd修复的潜力。通过16S rRNA基因序列分析鉴定出的不动杆菌sp. SG-5能够耐受1000 mg/l的Cd胁迫,具有体外产生吲哚-3-乙酸、增磷和1-氨基环丙烷-1-羧酸脱氨酶的能力。以玉米品种(3062-Cd耐型,31P41-Cd敏感型)为材料,采用培养皿试验研究了不动杆菌SG-5对Cd(0、6、12、18、24、30 μM)毒性的影响。结果表明,Cd处理对未接种玉米植株的生长、抗氧化剂和矿物离子获取的影响显著(31P41)。PGPB接种可增强玉米抗氧化潜能,并配合适宜的营养水平(K、Ca、Mg、Zn)。施用PGPB后的形态生理生化性状分析表明,菌株对Cd具有明显的耐受能力。31P41比耐受性强。3062。研究结果对于了解Cd敏感和耐Cd玉米品种在不动杆菌SG-5接种下的生长反应具有重要意义,并可能为减少Cd在可食用植物部分的残留和/或Cd的生物修复提供有效途径。

4、A total of 31 Acinetobacter isolates were obtained from the rhizosphere of Pennisetum glaucum and evaluated for their plant-growth-promoting traits. Two isolates, namely Acinetobacter sp. PUCM1007 and A. baumannii PUCM1029, produced indole acetic acid (10-13 microgram/ml). A total of 26 and 27 isolates solubilized phosphates and zinc oxide, respectively. Among the mineral-solubilizing strains, A. calcoaceticus PUCM1006 solubilized phosphate most efficiently (84 mg/ml), whereas zinc oxide was solubilized by A. calcoaceticus PUCM1025 at the highest solubilization efficiency of 918%. All the Acinetobacter isolates, except PUCM1010, produced siderophores. The highest siderophore production (85.0 siderophore units) was exhibited by A. calcoaceticus PUCM1016. Strains PUCM1001 and PUCM1019 (both A. calcoaceticus) and PUCM1022 (Acinetobacter sp.) produced both hydroxamate- and catechol-type siderophores, whereas all the other strains only produced catechol-type siderophores. In vitro inhibition of Fusarium oxysporum under iron-limited conditions was demonstrated by the siderophore-producing Acinetobacter strains, where PUCM1018 was the most potent inhibitor of the fungal phytopathogen. Acinetobacter sp. PUCM1022 significantly enhanced the shoot height, root length, and root dry weights of pearl millet seedlings in pot experiments when compared with controls, underscoring the plant-growth-promoting potential of these isolates.

这项研究从珍珠米(Pennisetum glaucum)的根际环境中分离了共计31株不动杆菌属(Acinetobacter)细菌,并对它们的植物生长促进特性进行了评估。其中,两株分别为Acinetobacter sp. PUCM1007和A. baumannii PUCM1029的细菌产生吲哚乙酸(10-13微克/毫升)。总共有26株和27株细菌溶解了磷酸盐和氧化锌。在溶解矿物质方面,A. calcoaceticus PUCM1006以最高的溶解效率溶解了磷酸盐(84毫克/毫升),而A. calcoaceticus PUCM1025以最高的溶解效率溶解了氧化锌(918%)。除了PUCM1010之外,所有的不动杆菌属细菌都产生了铁载体。A. calcoaceticus PUCM1016表现出了最高的铁载体产量(85.0铁载体单位)。株系PUCM1001和PUCM1019(都是A. calcoaceticus)以及PUCM1022(Acinetobacter sp.)产生了羟酸和邻苯二酚型铁载体,而所有其他株系只产生邻苯二酚型铁载体。在铁限制条件下,产生铁载体的Acinetobacter株系在体外抑制了福斯克里螺旋孢子菌(Fusarium oxysporum),其中PUCM1018是最有效的抑制剂。在盆栽实验中,Acinetobacter sp. PUCM1022显著提高了珍珠米幼苗的茎高、根长和根干重,与对照组相比,强调了这些细菌株系的植物生长促进潜力。

 
posted @ 2023-09-06 16:39  王哲MGG_AI  阅读(1493)  评论(0)    收藏  举报