Species-specific synergistic effects of two plant growth-Promoting microbes on green roof plant biomass and photosynthetic efficiency

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Xie , L , Lehvävirta , S , Timonen , S , Kasurinen , J , Niemikapee , J & Valkonen , J P T 2018 , ' Species-specific synergistic effects of two plant growth-Promoting microbes on green roof plant biomass and photosynthetic efficiency ' , PLoS One , vol. 13 , no. 12 , 0209432 . https://doi.org/10.1371/journal.pone.0209432

Title: Species-specific synergistic effects of two plant growth-Promoting microbes on green roof plant biomass and photosynthetic efficiency
Author: Xie, Long; Lehvävirta, Susanna; Timonen, Sari; Kasurinen, Jutta; Niemikapee, Juhamatti; Valkonen, Jari P. T.
Contributor organization: Department of Agricultural Sciences
Fifth Dimension - Vegetated roofs and walls in urban areas
Biosciences
Faculty of Biological and Environmental Sciences
Department of Microbiology
Sari Timonen / Research Group
Environmental Sciences
Viikki Plant Science Centre (ViPS)
Plant Production Sciences
Plant Pathology and Virology
Teachers' Academy
Date: 2018-12-31
Language: eng
Number of pages: 16
Belongs to series: PLoS One
ISSN: 1932-6203
DOI: https://doi.org/10.1371/journal.pone.0209432
URI: http://hdl.handle.net/10138/293612
Abstract: Rhizophagus irregularis, an arbuscular mycorrhizal fungus, and Bacillus amyloliquefaciens, a bacterium, are microorganisms that promote plant growth. They associate with plant roots and facilitate nutrient absorption by their hosts, increase resistance against pathogens and pests, and regulate plant growth through phytohormones. In this study, eight local plant species in Finland (Antennaria dioica, Campanula rotundifolia, Fragaria vesca, Geranium sanguineum, Lotus corniculatus, Thymus serpyllum, Trifolium repens, and Viola tricolor) were inoculated with R. irregularis and/or B. amyloliquefaciens in autoclaved substrates to evaluate the plant growth-promoting effects of different plant/microbe combinations under controlled conditions. The eight plant species were inoculated with R. irregularis, B. amyloliquefaciens, or both microbes or were not inoculated as a control. The impact of the microbes on the plants was evaluated by measuring dry shoot weight, colonization rate by the arbuscular mycorrhizal fungus, bacterial population density, and chlorophyll fluorescence using a plant phenotyping facility. Under dual inoculation conditions, B. amyloliquefaciens acted as a "mycorrhiza helper bacterium" to facilitate arbuscular mycorrhizal fungus colonization in all tested plants. In contrast, R. irregularis did not demonstrate reciprocal facilitation of the population density of B. amyloliquefaciens. Dual inoculation with B. amyloliquefaciens and R. irregularis resulted in the greatest increase in shoot weight and photosynthetic efficiency in T. repens and F. vesca.
Subject: ARBUSCULAR-MYCORRHIZAL FUNGI
BACILLUS-AMYLOLIQUEFACIENS
GLOMUS-INTRARADICES
HELPER BACTERIA
DROUGHT TOLERANCE
LACCARIA-LACCATA
SOIL
RHIZOSPHERE
SUBSTRATE
TRANSPORT
1183 Plant biology, microbiology, virology
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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