PGPR in Coniferous Trees

Cardoso, Elke Jurandy Bran Nogueira; Vasconcellos, Rafael Leandro de Figueiredo; Ribeiro, Carlos; Miyauchi, Marina Yumi Horta

doi:10.1007/978-3-642-18357-7_12

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Although our understanding of the effects and mechanisms of microbial action on plants is growing, there is no doubt that it is limited. The practical use and routine application of microorganisms remains a challenge, and it may take many years before our understanding is adequate to ensure their successful application in different systems (Cardoso et al, 2011). In this study, we could not determine that rhizosphere microorganisms contribute directly to the trunk types of P. yunnanensis, but the results provide us with some useful information for future studies on the causes of twisted trunk formation.…”

Section: Discussionmentioning

confidence: 87%

“…Regarding conifers, Timonin (1964) found that disinfecting seeds of P. banksiana and P. glauca caused a significant reduction in seedling emergence. It was only later that researchers discovered that the lack of certain microorganisms on the seed surface may negatively affect seed germination and be detrimental to plant growth and development (Cardoso et al, 2011). Subsequent studies have found that rhizosphere microorganisms influence conifers in every way (Garcìa et al, 2004;Heredia-Acuña et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

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Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Gan

et al. 2023

Front. Microbiol.

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BackgroundPinus yunnanensis is a major silvicultural species in Southwest China. Currently, large areas of twisted-trunk Pinus yunnanensis stands severely restrict its productivity. Different categories of rhizosphere microbes evolve alongside plants and environments and play an important role in the growth and ecological fitness of their host plant. However, the diversity and structure of the rhizosphere microbial communities between P. yunnanensis with two different trunk types—straight and twisted—remain unclear.MethodsWe collected the rhizosphere soil of 5 trees with the straight and 5 trees with the twisted trunk type in each of three sites in Yunnan province. We assessed and compared the diversity and structure of the rhizosphere microbial communities between P. yunnanensis with two different trunk types by Illumina sequencing of 16S rRNA genes and internal transcribed spacer (ITS) regions.ResultsThe available phosphorus in soil differed significantly between P. yunnanensis with straight and twisted trunks. Available potassium had a significant effect on fungi. Chloroflexi dominated the rhizosphere soils of the straight trunk type, while Proteobacteria was predominant in the rhizosphere soils of the twisted trunk type. Trunk types significantly explained 6.79% of the variance in bacterial communities.ConclusionThis study revealed the composition and diversity of bacterial and fungal groups in the rhizosphere soil of P. yunnanensis with straight and twisted trunk types, providing proper microbial information for different plant phenotypes.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Gan

et al. 2023

Front. Microbiol.

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“…Conifers have adapted to survive in harsh environments, a wide range of climatic condition, soil types, drought and temperature stresses (Cardoso et al . ). Systematic data are unavailable regarding the potential of Pinus roxburghii bacteria as bio‐inoculants for wheat.…”

Section: Introductionmentioning

confidence: 97%

Assessment of microbial diversity in the rhizosphere of Pinus roxburghii (Sarg.) and bio‐inoculant potential of selected pine bacterial isolates for wheat varieties based on cultureindependent and culture‐dependent techniques

2017

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Evidence is lacking regarding compatibility of pine bacteria as bio-inoculants for crops. The diversity and abundance of rhizosphere bacteria of Pinus roxburghii has never been investigated with simultaneous application of culture-dependent and culture-independent techniques. The present study was aimed to isolate, characterise, check the bio-inoculant potential of pine bacteria and assess rhizosphere bacterial diversity using culture-independent advanced approaches. Forty bacteria isolated from the rhizoplane of P. roxburghii growing in a cold climate at high altitude in Murree, were morphologically characterised; nine were identified by 16S rRNA sequence analyses and used in experiments. Diversity and abundance of the 16S rRNA gene and nifH gene in the rhizosphere was assessed by cloning, RFLP analysis, 454-amplicon pyrosequencing and qPCR. The bacterial isolates significantly improved dry weight of shoot, root, root area, IAA and GA content, number of grains plant , weight of grains plant in wheat varieties Chakwal-50 and Fareed-06 under axenic and field conditions. The number of 16S rRNA sequences (2979) identified by pyrosequencing shared similarity with 13 phyla of bacteria and archaea. The results confirm the existence of diverse bacteria of agricultural and industrial importance in the rhizosphere and compatibility of rhizoplane bacteria as bio-inoculants for wheat varieties.

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“…In addition to symbiotic fungi, rhizobacteria were also isolated from the rhizosphere of white spruce host naturally regenerating on the Sigma-Lamaque mining site. Like mycorrhizae, bacterial strains can increase plant performance as observed in coniferous tree species ( Cardoso et al, 2011 ). As a matter of fact, the use of biofertilizers in agriculture is gaining popularity worldwide ( Humphry et al, 2007 ; Baset Mia and Shamsuddin, 2010 ; Damir et al, 2011 ; Hrynkiewicz and Baum, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Mycorrhizae and Rhizobacteria on Precambrian Rocky Gold Mine Tailings: I. Mine-Adapted Symbionts Promote White Spruce Health and Growth

Nadeau¹,

Laur

Khasa

2018

Front. Plant Sci.

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White spruce [Picea glauca (Moench) Voss] is a commercially valuable boreal tree that has been known for its ability to colonize deglaciated rock tailings. Over the last decade, there has been an increasing interest in using this species for the revegetation and successful restoration of abandoned mine spoils. Herein, we conducted a glasshouse experiment to screen mycorrhizal fungi and rhizobacteria capable of improving the health and growth of white spruce seedlings growing directly on waste rocks (WRs) or fine tailings (FTs) from the Sigma-Lamaque gold mine located in the Canadian Abitibi region. After 32 weeks, measurements of health, growth, and mycorrhizal colonization variables of seedlings were performed. Overall, symbionts isolated from roots of healthy white spruce seedlings growing on the mining site, especially Cadophora finlandia Cad. fin. MBN0213 GenBank No. KC840625 and Pseudomonas putida MBN0213 GenBank No. AY391278, were more efficient in enhancing seedling health and growth than allochthonous species and constitute promising microbial symbionts. In general, mycorrhizae promoted plant health and belowground development, while rhizobacteria enhanced aboveground plant biomass. The observed beneficial effects were substrate-, strain-, and/or strains combination-specific. Therefore, preliminary experiments in control conditions such as the one described here can be part of an efficient and integrated strategy to select ecologically well-adapted symbiotic microorganisms, critical for the success of a long-term revegetation program.

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PGPR in Coniferous Trees

Cited by 5 publications

References 27 publications

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Assessment of microbial diversity in the rhizosphere of Pinus roxburghii (Sarg.) and bio‐inoculant potential of selected pine bacterial isolates for wheat varieties based on cultureindependent and culture‐dependent techniques

Mycorrhizae and Rhizobacteria on Precambrian Rocky Gold Mine Tailings: I. Mine-Adapted Symbionts Promote White Spruce Health and Growth

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