Formulation technology: Macrocystis pyrifera extract is a suitable support/medium for Azospirillum brasilense

Iparraguirre, Julia; Llanes, Analía; Masciarelli, Oscar; Guilherme, J. Zocolo; Laura, Villasuso Ana; Luna, Virginia

doi:10.1016/j.algal.2022.102916

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…They were dried naturally in the shade until they reach 18% humidity, and then washed intensely with demineralized water to remove excess sodium. The extract was made with a hydroalcoholic solution (80% demineralized water and 20% propylene glycol) (Iparraguirre et al 2023).…”

Section: Biological Materialsmentioning

confidence: 99%

“…In summary, the root and shoot growth promotion found in the seedlings of the different horticultural species may be explained by the high concentrations of AIA, gibberellins and 6-BAP present in the biofertilization treatments applied in this work.The results obtained with the combined formula AE + Az39 demonstrate the role of Macrocystis pyrifera extract as an excellent culture medium, adeptly nurturing the bacteria's metabolic and physiological state. This extract effectively serves as a vehicle for the inoculant, underscoring its potential as a pivotal component in e cacious and environmentally friendly inoculation strategies(Iparraguirre et al 2023). This phenomenon can be attributed to the diverse array of polymers synthesized by brown macroalgae, including agars, carrageenans, fucans, and phlorotanins(Khan et al.…”

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confidence: 99%

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Technological innovation in bioformulation between algae and PGPR to optimize germination and early growth of horticultural species

Iparraguirre,

Llanes,

Cortés

et al. 2023

Preprint

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In recent years, the landscape of horticulture has undergone a transformation characterized by a reduction in cultivation area and a simultaneous surge in intensive production. This shift has been driven by the integration of cutting-edge technological innovations, with a notable emphasis on biofertilization techniques aimed at enriching soil nutrients. Within this context, our current study explores the efficiency of a novel biofertilizer originated from the synergy between Macrocystis pyrifera algal extracts and the plant growth–promoting bacterium Azospirillum argentinense. This study is focused on assessing the potential of this biofertilizer to enhance germination and the establishment phase of prevalent horticultural species, including tomato, lettuce, radish, chicory and cabbage. The seeds of the five species were inoculated and placed in germination trays in a growth chamber to evaluate germination and early seedling growth. The results showed a positive effect of the combined use of both biofertilizers on germination in lettuce, radish and chicory, where the co-inoculation produced significant differences. Moreover, early growth parameters were significantly improved in all the horticultural species studied, mainly with the combination of A. argentinense and algal extract. From the results obtained arise that the use of M. pyrifera algal extract is an interesting tool for agriculture that may improve the general plant growth and to provide stress protection. Moreover, a new biofertilizing formula is obtained when A. argentinense is combined with the algal extract, with promising effects on germination and early growth in the horticultural species used in this study.

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Section: Biological Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

Technological innovation in bioformulation between algae and PGPR to optimize germination and early growth of horticultural species

Iparraguirre,

Llanes,

Cortés

et al. 2023

Preprint

Self Cite

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“…[5] There are multiple methods to determine the plant growth promoting activity and its activation pathways; the most direct is by gene suppression test in models such as that using Arabidopsis thaliana mutants, [6,7] although this involves a lot of time and investment. Another method is through their evaluation in biological models such as rice leaf tilt test, [8] lettuce root development test, [9,10] bean internode elongation, [11] biomass increase in soybean bulbs. [12] These tests are associated with activation of various phytohormone receptors (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

22‐Oxocholestanes SPGP4 and SPGP8: in Silico and in Vitro Study as Activators of Plant Growth Promotion

Balbuena-Hernández

Miranda-Arámbula

Merino-Montiel

et al. 2023

Chemistry & Biodiversity

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The 22-oxocholestanes compounds have shown an outstanding plant growth promoting activity; they have similar bioactivity as brassinosteroids, so they are normally named as brassinosteroid analogs thinking that they also impact on the known receptor BRI1. However, in silico studies allow us to predict interactions with other receptors and thus it's possible to evaluate them, through receptors of gibberellins, auxins, jasmonates, strigolactones and the protein associated with the BRI1 gene. This article describes the bioactivity of structures SPGP4 and SPGP8 as plant growth-promoting compounds. Both structures present coupling energies and interactions at the same level as epibrassinolide in the protein associated with BRI1 gene. Additionally, interactions through the auxin pathway and to strigolactone receptor were found using selected tests. In the rice lamina tilt, a higher effect was obtained when SPGP4 and SPGP8 were compared to epibrassinolide, although in a lesser level vis à vis to homobrassinolide. In the same way, when SPGP4 and SPGP8 were tested in the Growth Root Model an activity as strigonolactones was observed, enhancing the relationship between the main and secondary roots. However, the growth of coleptiles, when applying auxins, compounds SPGP4 and SPGP8 did not reach the same level as controls. In the tests associated to gibberellins and jasmonic acid, an increased bioactivity was observed, although this behavior was not reflected from the in silico study, possibly due to secondary signaling cascades. This work demonstrates that the 22oxocolestane compounds SPGP4 and SPGP8 could be used as plant growth hormones, promoting several pathways.

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Cultivation of Gongolaria barbata (Fucales, Phaeophyceae) with a seaweed-derived biostimulant in order to improve photophysiological fitness and promote fertility to advance the restoration of marine macroalgal forests

et al. 2023

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As a result of several anthropogenic factors, Cystoseira sensu lato forests have declined or become regionally extinct in many coastal regions of the Mediterranean. Given the low natural recovery of lost populations, research efforts have been encouraged to develop sustainable and efficient restoration of macroalgal forests on a large scale. By promoting growth and fertility of collected thallus branches under controlled laboratory conditions, the availability of seedlings for restoration could be ensured without jeopardizing natural populations. Here we investigated the effect of a commercial algal biostimulant (AlgatronCifo®) on the photophysiology, growth and fertility of Gongolaria barbata (Stackhouse) Kuntze (Fucales, Phaeophyceae). In a factorial laboratory experiment, two different temperatures (10 ºC and 14 °C) and two culture media [i.e. seawater (SW) and Algatron (AT)] were tested. The photosynthetic performance of G. barbata doubled after three weeks of culture with AT, while it decreased by 25% when cultivated in SW. The highest photosynthetic performance and growth were achieved at 14ºC with AT, where fertile receptacles also developed, followed by seedling settlements. The thalli cultured in AT had similar or better photosynthetic performance than the initial control thalli. AT-cultured thalli had a greater ability to quench energy via photochemical pathways (qP) than those from the SW, which on the contrary, had higher levels of non-photochemical responses (qN, NPQmax). This limited photosynthetic performance was probably linked to the higher P-limitation experienced under that treatment. The algal biostimulant enhanced the physiological performance and induced fertility of G. barbata, demonstrating its valorization potential and setting a new path for improved restoration applications.

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Formulation technology: Macrocystis pyrifera extract is a suitable support/medium for Azospirillum brasilense

Cited by 6 publications

References 45 publications

Technological innovation in bioformulation between algae and PGPR to optimize germination and early growth of horticultural species

Technological innovation in bioformulation between algae and PGPR to optimize germination and early growth of horticultural species

22‐Oxocholestanes SPGP4 and SPGP8: in Silico and in Vitro Study as Activators of Plant Growth Promotion

Cultivation of Gongolaria barbata (Fucales, Phaeophyceae) with a seaweed-derived biostimulant in order to improve photophysiological fitness and promote fertility to advance the restoration of marine macroalgal forests

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