10 Endophytic Actinobacteria Associated …
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Table 10.2 Bioactivities related to nutrient uptake of endophytic actinobacteria from mycorrhizal
spores
Mycorrhiza
Taxa
Bioactivities References
Glomus mosseae
Streptomyces avermitilis
Streptomyces canus
Leifsonia poae
• Production
of
siderophore
Mohandas
et al.
(2013);
Poovarasan
et al.
(2013);
Poovarasan
et al. (2015)
Streptomyces avermitilis
Streptomyces canus
Leifsonia poae
Streptomyces fradiae
Streptomyces netropis
Streptomyces scabies
Streptomyces griseus
Streptomyces violarus
Streptomyces albidoflavus
Streptomyces cinnamonenesis
• Phosphate
and zinc
solubilization
• Organic
acid
production
(such as
gluconic
acid)
Rhizophagus
intraradices isolate
IMA6
Streptomyces spp.
Nocardiodes albus
• Phosphate
and phytate
solubilization
Battini
et al. (2016)
Arthrobacter phenanthrenivorans
• Siderophore
production
Funneliformis
mosseae CMU-RYA08
Pseudonocardia sp. isolate SP
• Streptomyces pilosus isolate S4
• Streptomyces pilosus isolate S4-1
• Streptomyces thermocarboxydus
isolate 48
• Siderophore
production
Lasudee
et al. (2018)
• Streptomyces spinoverrucosus isolate
S1
• Streptomyces thermocarboxydus
isolate S3
• Siderophore
production
• Phosphate
solubilization
in insoluble forms which plants cannot uptake (Glick 2012). In soils, phosphorus
usually exists in two forms insoluble inorganic and insoluble organic forms. Phosphorus can be bound with hydrated oxides such as aluminum (Al), iron (Fe), and
manganese (Mn) that are poorly dissolved and assimilated (Behera et al. 2014).
Similar to bacteria in soil, actinobacteria solubilize phosphate via mechanism: (i)
production of organic acids (ii) secretion of enzymes. Some actinobacteria synthesize organic acids to solubilize inorganic phosphorus. Actinobacteria isolated from
G. mosseae were able to solubilize tricalcium phosphate and aluminum phosphate
by producing at least four organic acids (Poovarasan et al. 2015). In general, these