I Iu Bakunina, O I Nedashkovskaia, S A Alekseeva, E P Ivanova, L A Romanenko, N M Gorshkova, V V Isakov, T N Zviagintseva, V V Mikhaĭlov
It was found that Pseudoalteromonas citrea strains KMM 3296 and KMM 3298 isolated from the brown algae Fucus evanescens and Chorda filum, respectively, and strain 3297 isolated from the sea cucumber Apostichopus japonicus are able to degrade fucoidans. The fucoidanases of these strains efficiently degraded the fucoidan of brown algae at pH 6.5-7.0 and remained active at 40-50 degrees C. The endo-type hydrolysis of fucoidan resulted in the formation of sulfated alpha-L-fucooligosaccharides. The other nine strains of P. citrea studied (including the type strain of this species), which were isolated from other habitats, were not able to degrade fucoidan.
{"title":"[Degradation of fucoidan by the marine proteobacterium Pseudoalteromonas citrea].","authors":"I Iu Bakunina, O I Nedashkovskaia, S A Alekseeva, E P Ivanova, L A Romanenko, N M Gorshkova, V V Isakov, T N Zviagintseva, V V Mikhaĭlov","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>It was found that Pseudoalteromonas citrea strains KMM 3296 and KMM 3298 isolated from the brown algae Fucus evanescens and Chorda filum, respectively, and strain 3297 isolated from the sea cucumber Apostichopus japonicus are able to degrade fucoidans. The fucoidanases of these strains efficiently degraded the fucoidan of brown algae at pH 6.5-7.0 and remained active at 40-50 degrees C. The endo-type hydrolysis of fucoidan resulted in the formation of sulfated alpha-L-fucooligosaccharides. The other nine strains of P. citrea studied (including the type strain of this species), which were isolated from other habitats, were not able to degrade fucoidan.</p>","PeriodicalId":502114,"journal":{"name":"Mikrobiologiia","volume":"71 1","pages":"49-55"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138809445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L M Polianskaia, O T Vedina, L V Lysak, D G Zviagintsev
New strains of Beijerinckia mobilis and Clostridium sp. isolated from the pea rhizosphere were studied with respect to their promoting effect on the growth and development of some agricultural crops. Seed soaking in bacterial suspensions followed by the soil application of the suspensions or their application by means of foliar spraying was found to be the most efficient method of bacterization. The application of B. mobilis and Clostridium sp. cultures in combination with mineral fertilizers increased the crop production by 1.5-2.5 times. The study of the population dynamics of B. mobilis by the method of genetic marking showed that this bacterium quickly colonized the rhizoplane of plants and, therefore, had characteristics of an r-strategist. At the same time, Clostridium sp. was closer to K-strategists, since this bacterium slowly colonized the econiches studied. The introduction of the bacteria into soil did not affect the indigenous soil bacterial complex. The presence of Clostridium sp. slowed down the colonization of roots by the fungal mycelium. The possible mechanisms of the plant growth-promoting activity of B. mobilis and Clostridium sp. are discussed.
研究了从豌豆根瘤菌群中分离出的贝氏酵母菌和梭状芽孢杆菌新菌株对一些农作物生长发育的促进作用。研究发现，将种子浸泡在细菌悬浮液中，然后在土壤中施用悬浮液或通过叶面喷洒施用悬浮液是最有效的增菌方法。在施用矿物肥料的同时施用 B. mobilis 和梭状芽孢杆菌培养物，可使作物产量提高 1.5-2.5 倍。通过基因标记法对莫比莱氏梭菌的种群动态进行的研究表明，这种细菌能迅速定殖到植物的根瘤中，因此具有 r 战略家的特征。与此同时，梭状芽孢杆菌更接近于 K-战略菌，因为这种细菌在所研究的经济植物上的定殖速度较慢。将这种细菌引入土壤不会影响土壤中的本地细菌群。梭状芽孢杆菌的存在减缓了真菌菌丝在根部的定殖。本文讨论了 B. mobilis 和梭状芽胞杆菌促进植物生长活性的可能机制。
{"title":"[The growth-promoting effect of Beijerinckia and Clostridium sp. cultures on some agricultural crops].","authors":"L M Polianskaia, O T Vedina, L V Lysak, D G Zviagintsev","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>New strains of Beijerinckia mobilis and Clostridium sp. isolated from the pea rhizosphere were studied with respect to their promoting effect on the growth and development of some agricultural crops. Seed soaking in bacterial suspensions followed by the soil application of the suspensions or their application by means of foliar spraying was found to be the most efficient method of bacterization. The application of B. mobilis and Clostridium sp. cultures in combination with mineral fertilizers increased the crop production by 1.5-2.5 times. The study of the population dynamics of B. mobilis by the method of genetic marking showed that this bacterium quickly colonized the rhizoplane of plants and, therefore, had characteristics of an r-strategist. At the same time, Clostridium sp. was closer to K-strategists, since this bacterium slowly colonized the econiches studied. The introduction of the bacteria into soil did not affect the indigenous soil bacterial complex. The presence of Clostridium sp. slowed down the colonization of roots by the fungal mycelium. The possible mechanisms of the plant growth-promoting activity of B. mobilis and Clostridium sp. are discussed.</p>","PeriodicalId":502114,"journal":{"name":"Mikrobiologiia","volume":"71 1","pages":"123-9"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138809564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The incubation of pea seedling roots with the surface agglutinins R1 and R2 of Rhizobium leguminosarum 252 brought about an increase in the activity of proteases, beta-glucosidase, and, especially, succinate dehydrogenase in the roots. The data presented show that rhizobial agglutinins play an important part in the formation and functioning of legume-rhizobial associations.
{"title":"[Effect of Rhizobium leguminosarum 252 agglutinins on the activity of some plant cell enzymes].","authors":"L V Karpunina, E F Soboleva","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The incubation of pea seedling roots with the surface agglutinins R1 and R2 of Rhizobium leguminosarum 252 brought about an increase in the activity of proteases, beta-glucosidase, and, especially, succinate dehydrogenase in the roots. The data presented show that rhizobial agglutinins play an important part in the formation and functioning of legume-rhizobial associations.</p>","PeriodicalId":502114,"journal":{"name":"Mikrobiologiia","volume":"70 3","pages":"348-51"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138809429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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