scholarly journals Application of seaweed organic components increases tolerance to Fe deficiency in tomato plants

2019 ◽  
Author(s):  
Sandra Carrasco-Gil ◽  
Raúl Allende-Montalbán ◽  
Lourdes Hernández-Apaolaza ◽  
Juan José Lucena
Keyword(s):  
Plant Growth ◽  
Organic Compounds ◽  
Growth Promotion ◽  
Abiotic Stress Tolerance ◽  
Fe Deficiency ◽  
Tomato Plants ◽  
Hydroponic System ◽  
Beneficial Effects ◽  
Relevant Role ◽  
The Individual

AbstractThe beneficial effects of seaweed extracts have been related to plant growth regulators present in seaweeds. However, algae extracts comprise other organic compounds such as phenols, mannitol, alginates, laminarins and fucoidans that may have a relevant role regarding abiotic stress tolerance due to Fe deficiency. Therefore, we evaluated the individual effect of these organic compounds on the mitigation of Fe deficiency applying a range of concentrations (x1/10, x1, x10) in agar Petri dishes (in tomato seeds) and in the nutrient solution of a hydroponic system (tomato plants). Germination and plant growth promotion, root morphology, chlorophyll content and antioxidant activity were determined. Results showed that the lowest concentration x1/10 and phenolics, laminarin and fucose compounds contributed to increase the tolerance to Fe deficiency in tomato plants.

scholarly journals Application of Seaweed Organic Components Increases Tolerance to Fe Deficiency in Tomato Plants

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 507
Author(s):  
Sandra Carrasco-Gil ◽  
Raúl Allende-Montalbán ◽  
Lourdes Hernández-Apaolaza ◽  
Juan J. Lucena
Keyword(s):  
Plant Growth ◽  
Organic Compounds ◽  
Growth Promotion ◽  
Abiotic Stress Tolerance ◽  
Nutrient Deficiency ◽  
Fe Deficiency ◽  
Tomato Plants ◽  
Beneficial Effects ◽  
Relevant Role ◽  
The Individual

The beneficial effects of seaweed extracts have been related to plant growth regulators present in seaweeds. However, algae extracts comprise other organic compounds such as phenols, mannitol, alginates, laminarins, and fucoidans that may have a relevant role regarding abiotic stress tolerance due to nutrient deficiency. Therefore, we evaluated the individual effect of these organic compounds in a range of concentrations on the mitigation of Fe deficiency in tomato plants. Germination and plant growth promotion, root morphology, chlorophyll content, and antioxidant activity were determined. Results showed that the lowest concentration of phenolics, laminarin, and fucose compounds contributed to increasing the tolerance to Fe deficiency in tomato plants.

scholarly journals The Mycorrhiza-and Trichoderma-Mediated Elicitation of Secondary Metabolism and Modulation of Phytohormone Profile in Tomato Plants

Horticulturae ◽  
2021 ◽  
Vol 7 (10) ◽  
pp. 394
Author(s):  
Giusy Iula ◽  
Begoña Miras-Moreno ◽  
Luigi Lucini ◽  
Marco Trevisan
Keyword(s):  
Plant Growth ◽  
Secondary Metabolism ◽  
Plant Growth Promotion ◽  
Biosynthetic Pathway ◽  
Growth Promotion ◽  
Tomato Plants ◽  
Biochemical Processes ◽  
Beneficial Effects ◽  
Tomato Roots ◽  
Mutualistic Relationship

Arbuscular mycorrhiza and Trichoderma are well-known beneficial fungi whose plant growth promotion and defense elicitation effects are known. However, the molecular and biochemical processes underlying the beneficial effects of these priming microorganisms have not been fully elucidated yet. On this basis, the present work aimed to use metabolomics to dissect comprehensively the modulation of secondary metabolism induced by mycorrhiza and Trichoderma, using tomato as a model plant. To this aim, either mycorrhiza or Trichoderma were applied to tomato roots at transplanting using a commercial formulation and then harvested once the mutualistic relationship was well established. Shoots were analyzed using an MS-based untargeted metabolomics approach, and differential metabolites identified by multivariate statistics were subjected to pathway analysis. Together with promoting plant growth, the treatments induced a broad molecular reprogramming with the phenylpropanoid biosynthetic pathway (including defense phenolics like coumarins and glycosylated anthocyanins) being strongly elicited. An accumulation of auxins, cytokinins, and jasmonate (especially after treatment with Trichoderma) could be observed concerning phytohormone profiles. Overall, the broad and distinctive effects triggered by mycorrhiza and Trichoderma in tomato secondary metabolism supported both plant growth promotion and immunity.

Enhanced tomato plant growth in soil under reduced P supply through microbial inoculants and microbiome shifts

2019 ◽  
Vol 95 (9) ◽  
Author(s):  
Namis Eltlbany ◽  
Mohamed Baklawa ◽  
Guo-Chun Ding ◽  
Dinah Nassal ◽  
Nino Weber ◽  
...  
Keyword(s):  
Plant Growth ◽  
Root Growth ◽  
Growth Promotion ◽  
Bacterial Community Composition ◽  
Soil Microbial Communities ◽  
Rrna Gene ◽  
Pseudomonas Sp ◽  
Tomato Plants ◽  
Soil P ◽  
Bacterial Inoculants

ABSTRACT Soil microbial communities interact with roots, affecting plant growth and nutrient acquisition. In the present study, we aimed to decipher the effects of the inoculants Trichoderma harzianum T-22, Pseudomonas sp. DSMZ 13134, Bacillus amyloliquefaciens FZB42 or Pseudomonas sp. RU47 on the rhizosphere microbial community and their beneficial effects on tomato plants grown in moderately low phosphorous soil under greenhouse conditions. We analyzed the plant mass, inoculant colony forming units and rhizosphere communities on 15, 22, 29 and 43 days after sowing. Selective plating showed that the bacterial inoculants had a good rhizocompetence and accelerated shoot and root growth and nutrient accumulation. 16S rRNA gene fingerprints indicated changes in the rhizosphere bacterial community composition. Amplicon sequencing revealed that rhizosphere bacterial communities from plants treated with bacterial inoculants were more similar to each other and distinct from those of the control and the Trichoderma inoculated plants at harvest time, and numerous dynamic taxa were identified. In conclusion, likely both, inoculants and the rhizosphere microbiome shifts, stimulated early plant growth mainly by improved spatial acquisition of available nutrients via root growth promotion. At harvest, all tomato plants were P-deficient, suggesting a limited contribution of inoculants and the microbiome shifts to the solubilization of sparingly soluble soil P.

scholarly journals The Internal Glycine-Rich Motif and Cysteine Suppress Several Effects of the HpaGXooc Protein in Plants

2006 ◽  
Vol 96 (10) ◽  
pp. 1052-1059 ◽  
Author(s):  
Fengquan Liu ◽  
Hongxia Liu ◽  
Qin Jia ◽  
Xiaojing Wu ◽  
Xiaojing Guo ◽  
...  
Keyword(s):  
Plant Growth ◽  
Pseudomonas Syringae ◽  
Growth Promotion ◽  
Marker Genes ◽  
Pathogen Defense ◽  
Hypersensitive Cell Death ◽  
Tobacco Plants ◽  
Tomato Plants ◽  
Aerial Parts ◽  
Stimulate Plant Growth

HpaGXooc, produced by Xanthomonas oryzae pv. oryzicola, is a member of harpin group of proteins that stimulate plant growth, hypersensitive cell death (HCD), and pathogen defense. The protein contains two copies of the glycine-rich motif (GRM), a characteristic of harpins, and a cysteine, which is absent in other harpins. Genetic modification generated the pro-tein mutants HpaGXoocMG (MG) by deleting GRMs and HpaGXoocC47T (C47T) by replacing cysteine with threonine. When applied to tobacco plants, C47T and MG were 1.2- and 1.7-fold stronger, respectively, than HpaGXooc in inducing HCD, which occurred consistently with expression of the marker genes hin1 and hsr203. The proteins markedly alleviated infection of tobacco by Tobacco mosaic virus and Arabidopsis and tomato by Pseudomonas syringae. Treating tobacco plants with HpaGXooc, C47T, and MG decreased the viral infection by 58, 81, and 92%, respectively. In Arabidopsis and tomato plants treated with HpaGXooc, C47T, or MG, P. syringae multiplication was inhibited; bacterial population multiplied in 5 days in these plants were ca. 160-, 1,260-, or 15,860-fold smaller than that in control plants. So pathogen defense was induced in both plants. Defense-related genes Chia5, NPR1, and PR-1a were expressed consistently with resistance. In response to HpaGXooc, C47T, and MG, aerial parts and roots of tomato plants increased growth by 15 and 53%, 25 and 77%, and 46 and 106%, relative to controls. The expansin gene, EXP2, involved in the cell expansion and plant growth was expressed coordinately with plant growth promotion. These results suggest that the presence of GRM and cysteine in HpaGXooc represses the effects of the protein in plants.

scholarly journals Bacterial Formulations in Induction of Resistance and Growth Promotion of Tomato Plants

2018 ◽  
Vol 10 (10) ◽  
pp. 493
Author(s):  
José R. M. Campos Neto ◽  
Rafael Ribeiro Chaves ◽  
Diogo Herison Silva Sardinha ◽  
Luiz Gustavo de Lima Melo ◽  
Antônia Alice Costa Rodrigues
Keyword(s):  
Plant Growth ◽  
Fusarium Wilt ◽  
Seed Treatment ◽  
Dry Matter ◽  
Growth Promotion ◽  
Systemic Resistance ◽  
Tomato Plants ◽  
Vigor Index ◽  
Promote Plant Growth ◽  
Induction Of Resistance

The objective of this work was to evaluate the effectiveness of seed treatment with fresh suspensions and powder formulations with Bacillus methylotrophicus to promote plant growth and induction of resistance against fusarium wilt (Fusarium oxysporum f. sp. lycopersici) in tomato plants under greenhouse conditions, verifying the occurrence of morphological and biochemical changes in the evaluated plants. Powder formulations based on Cassava (Manihot esculenta), Arrowroot (Maranta arundinacea) and sodium alginate containing Bacillus, in addition to the commercial product Quartz®, were used to microbiolize the tomato seeds of the cultivar Santa Cruz. The formulations promoted plant growth, with a seedling vigor index greater than 50% for all treatments containing B. mthylotrophicus, in addition to a significant increase in total dry matter. The treatments induced systemic resistance, controlling the fusarium wilt with a 75% reduction of the disease and activation of enzymes such as peroxidase and polyphenoloxidase, only β-1,3-glucanase presented less activity than controls (treatments without B. mthylotrophicus). Thus, the use of formulations containing Bacillus are efficient in promoting plant growth of tomato plants and in inducing resistance to the control of fusarium wilt.

scholarly journals Comparative Genomics Reveals Potential Mechanisms of Plant Beneficial Effects of a Novel Bamboo-Endophytic Bacterial Isolate Paraburkholderia sacchari Suichang626

2021 ◽  
Vol 12 ◽  
Author(s):  
Kai Wang ◽  
Ying Wu ◽  
Mengyuan Ye ◽  
Yifan Yang ◽  
Fred O. Asiegbu ◽  
...  
Keyword(s):  
Comparative Genomics ◽  
Plant Growth ◽  
Growth Promotion ◽  
Moso Bamboo ◽  
Associated Bacteria ◽  
Beneficial Effects ◽  
Genome Wide ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Genome Information

Plant-beneficial microbes have drawn wide attention due to their potential application as bio-control agents and bio-fertilizers. Moso bamboo, which is among the monocots with the highest growth rate, lives perennially with abundant microbes that may benefit annually growing crops. Genome information of moso bamboo associated bacteria remains underexplored. We isolated and identified a novel Paraburkholderia strain Suichang626 from moso bamboo roots. Growth promoting effects of Suichang626 on both moso bamboo and seedlings of the model dicot Arabidopsis thaliana were documented in laboratory conditions. To gain insight into the genetic basis of this growth promotion effect, we sequenced the genome of Suichang626. Evidenced by genome-wide phylogeny data, we propose that Suichang626 is a novel strain of Paraburkholderia sacchari. Gene homologs encoding biosynthesis of the plant growth-promoting chemicals, acetoin and 2,3-butanediol, were identified in the genome of Suichang626. Comparative genomics was further performed with plant-beneficial and plant/animal pathogenic species of Paraburkholderia and Burkholderia. Genes related to volatile organic compounds, nitrogen fixation, and auxin biosynthesis were discovered specifically in the plant growth-promoting species of both genera.

scholarly journals Phenotype Switching in Metal-Tolerant Bacteria Isolated from a Hyperaccumulator Plant

Biology ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 879
Author(s):  
Artur Banach ◽  
Agnieszka Kuźniar ◽  
Anna Marzec-Grządziel ◽  
Anna Gałązka ◽  
Agnieszka Wolińska
Keyword(s):  
Plant Growth ◽  
Organic Compounds ◽  
Growth Promotion ◽  
Stress Factors ◽  
Dual Function ◽  
Azolla Filiculoides ◽  
Auxin Production ◽  
Promote Plant Growth ◽  
Achromobacter Sp ◽  
Metal Tolerant Bacteria

As an adaptation to unfavorable conditions, microorganisms may represent different phenotypes. Azolla filiculoides L. is a hyperaccumulator of pollutants, but the functions of its microbiome have not been well recognized to date. We aimed to reveal the potential of the microbiome for degradation of organic compounds, as well as its potential to promote plant growth in the presence of heavy metals. We applied the BiologTM Phenotypic Microarrays platform to study the potential of the microbiome for the degradation of 96 carbon compounds and stress factors and assayed the hydrolytic potential and auxin production by the microorganisms in the presence of Pb, Cd, Cr (VI), Ni, Ag, and Au. We found various phenotype changes depending on the stress factor, suggesting a possible dual function of the studied microorganisms, i.e., in bioremediation and as a biofertilizer for plant growth promotion. Delftia sp., Staphylococcus sp. and Microbacterium sp. exhibited high efficacy in metabolizing organic compounds. Delftia sp., Achromobacter sp. and Agrobacterium sp. were efficient in enzymatic responses and were characterized by metal tolerant. Since each strain exhibited individual phenotype changes due to the studied stresses, they may all be beneficial as both biofertilizers and bioremediation agents, especially when combined in one biopreparation.

scholarly journals Identifying Beneficial Qualities ofTrichoderma parareeseifor Plants

2014 ◽  
Vol 80 (6) ◽  
pp. 1864-1873 ◽  
Author(s):  
M. Belén Rubio ◽  
Narciso M. Quijada ◽  
Esclaudys Pérez ◽  
Sara Domínguez ◽  
Enrique Monte ◽  
...  
Keyword(s):  
Time Course ◽  
Plant Cell Wall ◽  
Growth Promotion ◽  
Expression Patterns ◽  
Hyphal Growth ◽  
Defense Responses ◽  
Tomato Plants ◽  
Lateral Root Development ◽  
Beneficial Effects

ABSTRACTTrichoderma parareeseiandTrichoderma reesei(teleomorphHypocrea jecorina) produce cellulases and xylanases of industrial interest. Here, the anamorphic strain T6 (formerlyT. reesei) has been identified asT. parareesei, showing biocontrol potential against fungal and oomycete phytopathogens and enhanced hyphal growth in the presence of tomato exudates or plant cell wall polymers inin vitroassays. ATrichodermamicroarray was used to examine the transcriptomic changes in T6 at 20 h of interaction with tomato plants. Out of a total 34,138Trichodermaprobe sets deposited on the microarray, 250 showed a significant change of at least 2-fold in expression in the presence of tomato plants, with most of them being downregulated.T. parareeseiT6 exerted beneficial effects on tomato plants in terms of seedling lateral root development, and in adult plants it improved defense againstBotrytis cinereaand growth promotion under salt stress. Time course expression patterns (0 to 6 days) observed for defense-related genes suggest that T6 was able to prime defense responses in the tomato plants against biotic and abiotic stresses. Such responses undulated, with a maximum upregulation of the jasmonic acid (JA)/ethylene (ET)-relatedLOX1andEIN2genes and the salt toleranceSOS1gene at 24 h and that of the salicylic acid (SA)-relatedPR-1gene at 48 h after T6 inoculation. Our study demonstrates that theT. parareeseiT6-tomato interaction is beneficial to both partners.

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