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腐植酸促进候选细菌丰富植物微生物群以抑制病原体
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作者 Maura Santos Reis de Andradeda Silva Orlando Carlos Huertas Tavares +12 位作者 Thiago Gonçalves Ribeiro Camilla Santos Reis de Andradeda Silva Carolina Santos Reis de Andradeda Silva JoséMaria García-Mina Vera Lúcia Divan Baldani Andrés Calderín García Ricardo Luiz Louro Berbara Ederson da Conceição Jesus 李子东(译) 熊传教(译) 周欣(译) 余玲玲(译) 刘可星(译) 《腐植酸》 2022年第3期103-115,共13页
腐植酸(HA)通过调节植物的激素和氧化还原代谢来刺激几种植物种类的生长,然而,关于HA与植物相关菌群的关系鲜有报道。本文中,我们假设HA效应与植物相关细菌群落的调控同时发生,水稻在施用或不施用HA(80 mg/L)的营养液中生长264 h,每24 ... 腐植酸(HA)通过调节植物的激素和氧化还原代谢来刺激几种植物种类的生长,然而,关于HA与植物相关菌群的关系鲜有报道。本文中,我们假设HA效应与植物相关细菌群落的调控同时发生,水稻在施用或不施用HA(80 mg/L)的营养液中生长264 h,每24 h评价1次植株生长,施用240 h后取样品进行16S rRNA基因测序。第1次施用HA后,从100 h到264 h植株净同化率、绝对生长率和相对生长率增加,根系体积和其他生长变量在植物生长周期的不同时间受到刺激。宏基因组分类揭示,使用HA后细菌群落结构和组成受到影响,HA处理的根部,群落成员间的相互作用增强,显示更多关联更密切的细菌群落,鞘氨醇菌属(Chitinophaga)和粘液杆菌属(Mucilaginibacter)是HA处理后根系的优势菌属。据报道,这些细菌能产生酶,降解真菌、卵菌和线虫卵壁中的化合物。铁载体产生者和植物生长促进者——假单胞菌(Pseudomonas)和酸杆菌Gp1(Acidobacteria Gp1)均富集,虽然丰度较低。鉴于这些结果,我们认为植物组建这些微生物是为了应对HA—根互作引起的胁迫。我们的研究结果首次表明,受HA刺激的植物可能采用组建细菌群落成员的生态策略,这些细菌群落成员是抑制病原体的候选者,因而参与植物防御. 展开更多
关键词 腐殖质 宏基因组分类 植物微生物群 植物生长促进 植物-微生物互作 植物防御
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Are our endoscopy patients at risk for pyogenic liver abscess?
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作者 Herwig Cerwenka Peter Schemmer 《World Journal of Gastroenterology》 SCIE CAS 2017年第30期5457-5459,共3页
This is an editorial comment on a recent publication reporting an increased rate of pyogenic liver abscesses(PLAs) after upper gastrointestinal panendoscopy. Its aim is to critically highlight the findings, limitation... This is an editorial comment on a recent publication reporting an increased rate of pyogenic liver abscesses(PLAs) after upper gastrointestinal panendoscopy. Its aim is to critically highlight the findings, limitations and potential clinical implications of this study. Issues of the mucosal barrier, the microbial flora, administration of antibiotics and underlying diseases are discussed. The probability of PLAs after endoscopies is not exactly known and the length of the "incubation period" remains unclear, but a possible causality should already suffice to make us think how to avoid them. Especially in patients with risk factors such as diabetes mellitus, end-stage renal disease, liver cirrhosis, biliary tract infection, and malignancies, the potential risk for PLAs should be considered. Unnecessary insufflation during endoscopy(causing mucosal stretching and microscopic tears) as well as mucosal damage(by direct abrasion with the scope) should be avoided in order to limit the invasiveness of the procedure as much as possible. And, in everyday routine, it should be kept in mind that in patients after endoscopy, especially in those with a breach of the mucosal barrier and significant comorbidities, PLAs can potentially develop and require timely administration of antibiotics as well as further diagnostic and therapeutic steps. 展开更多
关键词 内视镜检查法 Pyogenic 肝脓肿 Mucosal 障碍 胃肠的微生物引起的植物 COMORBIDITIES
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