Growth-promoting bacteria and arbuscular mycorrhizal fungi differentially benefit tomato and corn depending upon the supplied form of phosphorus

Saia, Sergio; Aissa, Echrak; Luziatelli, Francesca; Ruzzi, Maurizio; Colla, G.; Ficca, Anna Grazia; Cardarelli, Mariateresa; Rouphael, Youssef

doi:10.1007/s00572-019-00927-w

Cited by 79 publications

(52 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, the co-inoculation with endophytic fungi stimulated the below ground root growth (higher root biomass) compared to PH, PH + Trichoderma and especially to the untreated control. A stimulation/modulation of root auxin production after the inoculation with AMF strains (Rhizoglomus irregulare BEG72 and Funneliformis mosseae BEG 234) may explain the increase of root biomass in mycorrhized plants, as reported previously in maize, tomato, pepper, lettuce, zucchini, and wheat (Colla et al, 2015a,b;Lucini et al, 2018;Saia et al, 2019Saia et al, , 2020.…”

Section: Discussionsupporting

confidence: 52%

“…Arbuscular mycorrhizal fungi and Trichoderma represent two major classes of beneficial microbes (López-Bucio et al, 2015;Rouphael et al, 2015). The biostimulant action of these endophytic fungi under both favorable and stressful soil or environmental conditions has been associated with several putative mechanisms including: (i) the production of key enzymes such as phosphatases and/or release of small peptides, volatiles, and active metabolites that have hormone-like activity, (ii) enhancing photosynthetic efficiency and water relations, (iii) the promotion of nitrate, phosphate and ammonia transporters, (iv) the accumulation of osmoprotectants and antioxidants, and (v) the modulation of plant root architecture through the increase of root length, density and branching, resulting in enhanced nutrient uptake (P, Fe, Mn, and Zn) (Contreras-Cornejo et al, 2009;Woo et al, 2014;López-Bucio et al, 2015;Rouphael et al, 2015;Fiorentino et al, 2018;Lucini et al, 2019;Saia et al, 2019Saia et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metabolomic Responses of Maize Shoots and Roots Elicited by Combinatorial Seed Treatments With Microbial and Non-microbial Biostimulants

et al. 2020

Self Cite

View full text Add to dashboard Cite

Microbial and non-microbial plant biostimulants have been successfully used to improve agriculture productivity in a more sustainable manner. Since the mode of action of biostimulants is still largely unknown, the present work aimed at elucidating the morphophysiological and metabolomic changes occurring in maize (Zea mays L.) leaves and roots following seed treatment with (i) a consortium of two beneficial fungi [arbuscular mycorrhizal fungi (AMF) and Trichoderma koningii TK7] and rhizobacteria, (ii) a protein hydrolyzate-based biostimulant (PH) alone, or (iii) in combination with a consortium of T. koningii TK7 and rhizobacteria. The application of PH alone or in combination with Trichoderma elicited significant increases (+16.6%) in the shoot biomass compared to untreated maize plants, whereas inoculation with AMF + Trichoderma elicited significant increases in root dry biomass (+48.0%) compared to untreated plants. Distinctive metabolomic signatures were achieved from the different treatments, hence suggesting that different molecular processes were involved in the plants response to the biostimulants. The metabolic reprogramming triggered by the treatments including the protein hydrolyzate was hierarchically more pronounced than the application of microorganisms alone. Most of the differential metabolites could be ascribed to the secondary metabolism, with phenylpropanoids and terpenes being the most represented compounds. The application of PH triggered an accumulation of secondary metabolites, whereas the opposite trend of accumulation was seen in the case of microorganisms alone. The increase in biomass could be related to two processes, namely the modulation of the multilayer phytohormone interaction network and a possible increase in nitrogen use efficiency via the GS-GOGAT system.

show abstract

Section: Discussionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Metabolomic Responses of Maize Shoots and Roots Elicited by Combinatorial Seed Treatments With Microbial and Non-microbial Biostimulants

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…When a treatment was considered significant at p < 0.05, LSmeans p-differences were computed and corrected by the Tukey-Kramer adjustment at 0.05. See the supplementary material in Saia et al [24] for both a description of the procedure and the SAS package model applied.…”

Section: Discussionmentioning

confidence: 99%

Admixing Chaff with Straw Increased the Residues Collected without Compromising Machinery Efficiencies

et al. 2020

Self Cite

View full text Add to dashboard Cite

The collection of residues from staple crop may contribute to meet EU regulations in renewable energy production without harming soil quality. At a global scale, chaff may have great potential to be used as a bioenergy source. However, chaff is not usually collected, and its loss can consist of up to one-fifth of the residual biomass harvestable. In the present work, a spreader able to manage the chaff (either spreading [SPR] on the soil aside to the straw swath or admixed [ADM] with the straw) at varying threshing conditions (with either 1 or 2 threshing rotors [1R and 2R, respectively] in the combine, which affects the mean length of the straw pieces). The fractions of the biomass available in field (grain, chaff, straw, and stubble) were measured, along with the performances of both grain harvesting and baling operations. Admixing chaff allowed for a slightly higher amount of straw fresh weight baled compared to SPR (+336 kg straw ha −1 ), but such result was not evident on a dry weight basis. At the one time, admixing chaff reduced the material capacity of the combine by 12.9%. Using 2R compared to 1R strongly reduced the length of the straw pieces, and increased the bale unit weight; however, it reduced the field efficiency of the grain harvesting operations by 11.9%. On average, the straw loss did not vary by the treatments applied and was 44% of the total residues available (computed excluding the stubble). In conclusion, admixing of chaff with straw is an option to increase the residues collected without compromising grain harvesting and straw baling efficiencies; in addition, it can reduce the energy needs for the bale logistics. According to the present data, improving the chaff collection can allow halving the loss of residues. However, further studies are needed to optimise both the chaff and the straw recoveries.

show abstract

“…Due to the increasing demand of high-quality planting materials through agamic propagation and, in particular, tissue culture techniques ( Twaij et al, 2020 ), there is rising interest in the use of microbial and nonmicrobial biostimulants in the improvement of micropropagation methods for industrial, ornamental, and food vegetable and fruit crops ( Campobenedetto et al, 2020 ; Cardarelli et al, 2020 ; Cirillo et al, 2020 ; de Azevedo et al, 2020 ; Dong et al, 2020 ; Gulzar et al 2020 ; Luziatelli et al 2020b ; Umanzor et al, 2020 ). In this respect, beneficial microorganisms able to synthesize or metabolize plant hormones are of particular importance because they can modulate the balance between plant growth and defense against stresses and pathogens, by changing the concentration of specific phytohormones ( Tsukanova et al, 2017 ; Saia et al, 2019 , 2020 ; Rouphael et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the whole genome of P. agglomerans C1 was sequenced, providing insights into heavy metal resistance and metabolic capacities of this strain ( Luziatelli et al, 2019b , 2020a ). In addition, it was demonstrated that inoculation with C1 cells improved the growth in pots of tomato ( Solanum lycopersicum L.) and corn ( Zea mays L.) fertilized with rock phosphates ( Saia et al, 2020 ) and, also, that metabolites secreted by this strain can be utilized as biostimulants to improve the root surface area in cuttings of tomato ( Luziatelli et al, 2020a ), Prunus rootstocks GF/677, and Corylus avellana L. ( Luziatelli et al, 2020b ).…”

Section: Introductionmentioning

confidence: 99%

Metabolites Secreted by a Plant-Growth-Promoting Pantoea agglomerans Strain Improved Rooting of Pyrus communis L. cv Dar Gazi Cuttings

et al. 2020

Self Cite

View full text Add to dashboard Cite

Strains belonging to Pantoea agglomerans species are known for their ability to produce metabolites that can act in synergy with auxins to induce the adventitious root (AR) formation. The latter is critically important in the agamic propagation of several woody species, including pear ( Pyrus communis L.), playing a considerable role in the commercial nursery farms including those using micropropagation techniques. When grown on a medium amended with tryptophan, the plant-growth-promoting (PGP) strain P. agglomerans C1 produces a cocktail of auxin and auxin-like molecules that can be utilized as biostimulants to improve the rooting of vegetable ( Solanum lycopersicum L.) and woody crop species ( Prunus rootstock GF/677 and hazelnut). In this study, we evaluated the morphological and molecular responses induced by strain C1 exometabolites in microcuttings of P. communis L. cv Dar Gazi and the potential benefits arising from their application. Results showed that exometabolites by P. agglomerans C1 induced a direct and earlier emergence of roots from stem tissues and determined modifications of root morphological parameters and root architecture compared to plants treated with the synthetic hormone indole-3-butyric acid (IBA). Transcription analysis revealed differences in the temporal expression pattern of ARF17 gene when IBA and C1 exometabolites were used alone, while together they also determined changes in the expression pattern of other key auxin-regulated plant genes. These results suggest that the phenotypic and molecular changes triggered by P. agglomerans C1 are dependent on different stimulatory and inhibitory effects that auxin-like molecules and other metabolites secreted by this strain have on the gene regulatory network of the plant. This evidence supports the hypothesis that the strategies used to harness the metabolic potential of PGP bacteria are key factors in obtaining novel biostimulants for sustainable agriculture. Our results demonstrate that metabolites secreted by strain C1 can be successfully used to increase the efficiency of micropropagation of pear through tissue culture techniques.

show abstract

Growth-promoting bacteria and arbuscular mycorrhizal fungi differentially benefit tomato and corn depending upon the supplied form of phosphorus

Cited by 79 publications

References 65 publications

Metabolomic Responses of Maize Shoots and Roots Elicited by Combinatorial Seed Treatments With Microbial and Non-microbial Biostimulants

Metabolomic Responses of Maize Shoots and Roots Elicited by Combinatorial Seed Treatments With Microbial and Non-microbial Biostimulants

Admixing Chaff with Straw Increased the Residues Collected without Compromising Machinery Efficiencies

Metabolites Secreted by a Plant-Growth-Promoting Pantoea agglomerans Strain Improved Rooting of Pyrus communis L. cv Dar Gazi Cuttings

Contact Info

Product

Resources

About