Physiological characterization and electron microscopic investigation of cyanobacteria associated with wheat rhizosphere
Jazyk angličtina Země Spojené státy americké Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- elektronová mikroskopie MeSH
- kořeny rostlin růst a vývoj mikrobiologie MeSH
- kyseliny indoloctové metabolismus MeSH
- pšenice růst a vývoj mikrobiologie MeSH
- půdní mikrobiologie * MeSH
- sinice izolace a purifikace fyziologie účinky záření ultrastruktura MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- indoleacetic acid MeSH Prohlížeč
- kyseliny indoloctové MeSH
Physiological attributes of a set of cyanobacterial strains, isolated from the rhizosphere of wheat (var. HD 2687), identified as belonging to the genera Calothrix (n = 3), Westiellopsis (1), Hapalosiphon (2) and Nostoc (2), were axenized and evaluated. The concentrated culture filtrates of three cyanobacterial strains - C. ghosei, H. intricatus and Nostoc sp. were able to enhance germination percentage, radicle and coleoptile length in inhibition experiments with wheat seeds. Indole-3-acetic acid (IAA) production was recorded in light and dark (+0.5 % glucose) incubated cultures. Incubation in the presence of tryptophan significantly enhanced IAA production. Acetylene-reducing activity was higher in light incubated cultures of Nostoc sp. followed by C. ghosei, while in the dark, C. ghosei recorded highest values. TLC of the filtrates revealed the presence of several amino acids such as histidine, and auxin-like compounds. Co-culturing with selected strains recorded significant enhancement in plant chlorophyll. Root sections of wheat seedlings co-cultured with C. ghosei revealed the presence of short filaments inside the root hairs and cortical region. Such strains can be promising candidates for developing plant growth promoting associations for wheat crop, besides serving as model systems for understanding the metabolic interactions of cyanobacteria with host plant, such as wheat.
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World J Microbiol Biotechnol. 1992 Mar;8(2):132-6 PubMed
Crit Rev Microbiol. 1995;21(1):1-18 PubMed
FEMS Microbiol Ecol. 2006 Mar;55(3):382-90 PubMed
Bacteriol Rev. 1971 Jun;35(2):171-205 PubMed
Planta. 2002 Jun;215(2):229-38 PubMed
Folia Microbiol (Praha). 2008;53(4):333-41 PubMed
Planta. 1986 Jan;167(1):1-8 PubMed
J Chromatogr. 1968 Feb 6;32(3):592-5 PubMed
Plant Physiol. 1951 Jan;26(1):192-5 PubMed
FEMS Microbiol Lett. 2005 Apr 1;245(1):139-44 PubMed
Proc R Soc Lond B Biol Sci. 1952 Apr 24;139(896):372-97 PubMed
Appl Environ Microbiol. 1997 Nov;63(11):4479-84 PubMed
Folia Microbiol (Praha). 2006;51(5):455-8 PubMed
Folia Microbiol (Praha). 2008;53(1):35-43 PubMed
