Endophytic bacteria affect sugarcane physiology without changing plant growth

Marcos, Fernanda Castro Correia; Iório, Raquel de Paula Freitas; Silveira, Adriana Parada Dias da; Ribeiro, Rafael Vasconcelos; Machado, Eduardo Caruso; Lagôa, Ana Maria Magalhães de Andrade

doi:10.1590/1678-4499.256

Cited by 27 publications

(15 citation statements)

References 27 publications

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“…Although there are many reports on the effects of K. radicincitans (formerly known as E. radicincitans ) on a range of plants, such as Arabidopsis thaliana, radish, and tomato ( Berger, Brock & Ruppel, 2013 ; Brock et al, 2013 ; Berger et al, 2015 ), there are no reports on the effects of this bacterial species on sorghum growth or root architecture modification. With respect to P. fluorescens, Marcos et al (2016) found that the strain IAC/BECa 141, when used as an inoculant applied to two sugarcane varieties, increased chlorophyll a content without changing plant growth. Kumar et al (2012) studying the effect of seven different fluorescent Pseudomonas spp.…”

Section: Discussionmentioning

confidence: 99%

Effect ofBurkholderia tropicaandHerbaspirillum frisingensestrains on sorghum growth is plant genotype dependent

Schlemper

Dimitrov

Gutiérrez

et al. 2018

PeerJ

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Sorghum is a multipurpose crop that is cultivated worldwide. Plant growth-promoting bacteria (PGPB) have important roles in enhancing sorghum biomass and nutrient uptake and suppressing plant pathogens. The aim of this research was to test the effects of the endophytic bacterial species Kosakonia radicincitans strain IAC/BECa 99, Enterobacter asburiae strain IAC/BECa 128, Pseudomonas fluorescens strain IAC/BECa 141, Burkholderia tropica strain IAC/BECa 135 and Herbaspirillum frisingense strain IAC/BECa 152 on the growth and root architecture of four sorghum cultivars (SRN-39, Shanqui-Red, BRS330, BRS509), with different uses and strigolactone profiles. We hypothesized that the different bacterial species would trigger different growth plant responses in different sorghum cultivars. Burkholderia tropica and H. frisingense significantly increased the plant biomass of cultivars SRN-39 and BRS330. Moreover, cultivar BRS330 inoculated with either strain displayed isolates significant decrease in average root diameter. This study shows that Burkholderia tropica strain IAC/BECa 135 and H. frisingense strain IAC/BECa 152 are promising PGPB strains for use as inocula for sustainable sorghum cultivation.

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Section: Discussionmentioning

confidence: 99%

Effect ofBurkholderia tropicaandHerbaspirillum frisingensestrains on sorghum growth is plant genotype dependent

Schlemper

Dimitrov

Gutiérrez

et al. 2018

PeerJ

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“…This high microbial diversity challenges the introduction of new bacterial inoculants due to a high competition for physical space and niches, justifying the importance of the search for different and more efficient bacterial plant-promoting strains able to colonize sugarcane roots. Recent studies recognized the endophytic bacteria Paraburkholderia caribensis IAC/BECa-088, Paraburkholderia tropica IAC/BECa-135, Kosakonia radicincitans IAC/BECa-095, Pseudomonas fluorescens IAC/BECa-141, and Herbaspirillum frisingense IAC/BECa-152 as suitable inocula for sugarcane cultivation with the potential for alleviating Al stress in sugarcane plantlets [6,13,17]. These bacteria possess desirable characteristics of PGPB, such as antagonistic activities against phytopathogens, siderophore, auxins, and cyanide production.…”

Section: Introductionmentioning

confidence: 99%

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

et al. 2021

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Beneficial plant–microbe interactions lead to physiological and biochemical changes that may result in plant-growth promotion. This study evaluated the effect of the interaction between sugarcane and endophytic bacterial strains on plant physiological and biochemical responses under two levels of nitrogen (N) fertilization. Six strains of endophytic bacteria, previously selected as plant growth-promoting bacteria (PGPB), were used to inoculate sugarcane mini stalks, with and without N fertilization. After 45 days, biomass production; shoot nutrient concentrations; foliar polyamine and free amino acid profiles; activities of nitrate reductase and glutamine synthase; and the relative transcript levels of the GS1, GS2, and SHR5 genes in sugarcane leaves were determined. All six endophytic strains promoted sugarcane growth, increasing shoot and root biomass, plant nutritional status, and the use efficiency of most nutrients. The inoculation-induced changes at the biochemical level altered the foliar free amino acid and polyamine profiles, mainly regarding the relative concentrations of citrulline, putrescine, glycine, alanine, glutamate, glutamine, proline, and aspartate. The transcription of GS1, GS2, and SHR5 was higher in the N fertilized seedlings, and almost not altered by endophytic bacterial strains. The endophytic strains promoted sugarcane seedlings growth mainly by improving nutrient efficiency. This improvement could not be explained by their ability to induce the production of amino acid and polyamine composts, or GS1, GS2, and SHR5, showing that complex interactions may be associated with enhancement of the sugarcane seedlings’ performance by endophytic bacteria. The strains demonstrated biotechnological potential for sugarcane seedling production.

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“…Hence, these results document the ability of Paenibacillus strain s37 to enhance the concentrations of both free and storage carbohydrates and affect their allocation in the different plant tissues. Other bacterial inoculants have been reported to increase affect plant carbohydrate levels ( Marcos et al, 2016 ; Qin et al, 2016 ) but the mechanism behind the effect of bacterial inoculations on the concentrations of plant carbohydrates is still poorly understood ( Magel et al, 2000 ; Gagné-Bourque et al, 2016 ). In consequence, there is a need to implement physiological phenotyping into a holistic phenomics approach ( Großkinsky et al, 2015 , 2018 ) to clarify how bacterial inoculation affects the regulation of carbohydrate metabolism in A. nordmanniana.…”

Section: Discussionmentioning

confidence: 99%

“…Sucrose is the form in which most carbon is transported in the plant ( El-Lithy et al, 2010 ), whereas small size monosaccharides are actively used for growth ( Schiestl-Aalto et al, 2019 ). Hence, the concentration and distribution of NSC is indicative of the accumulated carbohydrate reserves available for growth, and can be affected by bacterial inoculants, even sometimes without affecting growth ( Vardharajula et al, 2011 ; Gagné-Bourque et al, 2016 ; Marcos et al, 2016 ), indicating that carbohydrate levels may be sensitive markers of inoculant impact on plant physiology.…”

Section: Introductionmentioning

confidence: 99%

Identification of Root-Associated Bacteria That Influence Plant Physiology, Increase Seed Germination, or Promote Growth of the Christmas Tree Species Abies nordmanniana

et al. 2020

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Abies nordmanniana is used for Christmas tree production but poor seed germination and slow growth represent challenges for the growers. We addressed the plant growth promoting potential of root-associated bacteria isolated from A. nordmanniana . Laboratory screenings of a bacterial strain collection yielded several Bacillus and Paenibacillus strains that improved seed germination and produced indole-3-acetic acid. The impact of three of these strains on seed germination, plant growth and growth-related physiological parameters was then determined in greenhouse and field trials after seed inoculation, and their persistence was assessed by 16S rRNA gene-targeted bacterial community analysis. Two strains showed distinct and significant effects. Bacillus sp. s50 enhanced seed germination in the greenhouse but did not promote shoot or root growth. In accordance, this strain did not increase the level of soluble hexoses needed for plant growth but increased the level of storage carbohydrates. Moreover, strain s50 increased glutathione reductase and glutathione-S-transferase activities in the plant, which may indicate induction of systemic resistance during the early phase of plant development, as the strain showed poor persistence in the root samples (rhizosphere soil plus root tissue). Paenibacillus sp. s37 increased plant root growth, especially by inducing secondary root formation, under in greenhouse conditions, where it showed high persistence in the root samples. Under these conditions, it further it increased the level of soluble carbohydrates in shoots, and the levels of starch and non-structural carbohydrates in roots, stem and shoots. Moreover, it increased the chlorophyll level in the field trial. These findings indicate that this strain improves plant growth and vigor through effects on photosynthesis and plant carbohydrate reservoirs. The current results show that the two strains s37 and s50 could be considered for growth promotion programs of A. nordmanniana in greenhouse nurseries, and even under field conditions.

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Endophytic bacteria affect sugarcane physiology without changing plant growth

Cited by 27 publications

References 27 publications

Effect ofBurkholderia tropicaandHerbaspirillum frisingensestrains on sorghum growth is plant genotype dependent

Effect ofBurkholderia tropicaandHerbaspirillum frisingensestrains on sorghum growth is plant genotype dependent

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

Identification of Root-Associated Bacteria That Influence Plant Physiology, Increase Seed Germination, or Promote Growth of the Christmas Tree Species Abies nordmanniana

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