Antarctic Pseudomonas spp. promote wheat germination and growth at low temperatures

The development of cold-active biofertilizers and biopesticides could help improve sustainable agriculture in mountainous regions. With this aim, both psychrophilic and psychrotolerant microorganisms have been prospected in cold regions around the world and tested for their plant-growth promoting (P...

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Vydáno v:Polar biology Ročník 41; číslo 11; s. 2343 - 2354
Hlavní autoři: Yarzábal, Luis Andrés, Monserrate, Lorena, Buela, Lenys, Chica, Eduardo
Médium: Journal Article
Jazyk:angličtina
Vydáno: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2018
Springer
Springer Nature B.V
Témata:
Acetic acid
Biofertilizers
Biomedical and Life Sciences
Biopesticides
Calcium
Calcium phosphates
Carbon sources
Cold
Cold regions
Cyanides
Ecology
Elongation
Fertilizers
Fungi
Fusarium oxysporum
Germination
Growth
Growth chambers
Hydrogen cyanide
Indoleacetic acid
Inoculation
Life Sciences
Low temperature
Metabolites
Microbiology
Microorganisms
Mountain regions
Oceanography
Original Paper
Pesticides
Phosphates
Phytophthora infestans
Plant Sciences
Pseudomonas
Psychrophiles
Pythium ultimum
Secondary metabolites
Seedlings
Seeds
Siderophores
Soil
Soil temperature
Sugar
Sustainable agriculture
Triticum aestivum
Wheat
Zoology
Psychrotolerant
Plant-growth promoting bacteria
Antarctica
Biofertilizers
ISSN:0722-4060, 1432-2056
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Shrnutí:The development of cold-active biofertilizers and biopesticides could help improve sustainable agriculture in mountainous regions. With this aim, both psychrophilic and psychrotolerant microorganisms have been prospected in cold regions around the world and tested for their plant-growth promoting (PGP) effects. Interestingly, very little is known about the PGP effects of polar microorganisms in commercial crops. This study aimed at isolating cold-active plant-growth promoting Pseudomonas spp. from Antarctic soils and testing their PGP effects, both in vitro and on wheat ( Triticum aestivum ). Twenty-five Pseudomonas spp. strains isolated from Antarctic soils at Greenwich Island (South Shetland Islands, Antarctic Peninsula) were tested. The isolates grew well at temperatures ranging from 4 to 30 °C and were therefore considered as eury-psychrophiles. The isolates solubilized tri-calcium phosphate at 8 and 16 °C in the presence of different sugars as sole carbon sources. Besides producing indole-acetic acid, siderophores and hydrogen cyanide, several isolates inhibited growth of three plant pathogenic fungi ( Fusarium oxysporum , Pythium ultimum and Phytophtora infestans ) by means of both soluble- and volatile-secondary metabolites. Bacterization of T. aestivum seeds with selected isolates significantly enhanced root elongation. Moreover, when grown in sterile soil and in a temperature-controlled growth chamber at 14 ± 1 °C, inoculated T . aestivum seedlings showed a significant increase in their root- and shoot-lengths compared to untreated controls. Overall, the results suggest that some of these Antarctic Pseudomonas spp. isolates could act as cold-active biofertilizers.
Bibliografie:ObjectType-Article-1
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ISSN:0722-4060
1432-2056
DOI:10.1007/s00300-018-2374-6