Physical characterisation of chia mucilage polymeric gel and its implications on rhizosphere science - Integrating imaging, MRI, and modelling to gain insights into plant and microbial amended soils

Williams, Katherine; Ruiz, Siul; Petroselli, Chiara; Walker, Nicole; Fletcher, Daniel McKay; Pileio, Giuseppe; Roose, Tiina

doi:10.1016/j.soilbio.2021.108404

Cited by 7 publications

(5 citation statements)

References 48 publications

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“…EPS will adhere to the dry surface without moisture and release water. Additionally, some studies have suggested that EPS can form fine filaments and two-dimensional structures in the soil to keep liquids connected; in the event of a water shortage, the network of two-dimensional structures will slow the diffusion of water vapor and hold the water in the soil [67,68].…”

Section: Discussionmentioning

confidence: 99%

Mineral-Solubilizing Soil Bacteria Permanently Green Rocky Slopes by Enhancing Soil Adhesion to the Surface of Rocky Slopes

Wang

Tang

Liu

et al. 2022

Forests

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Rocky slopes are vulnerable to landslides and mudslides, which pose a major threat to human life and property. Research is being conducted to improve the adhesion between soil and minerals by mineral-solubilizing bacteria to manage slopes scientifically and develop novel methods for slope greening. From the soil of Nanjing Mufu Mountain’s weathered rock walls, we isolated various soil mineral-solubilizing soil bacteria. During the soil bacterial solubilization test, we discovered that some soil bacteria could enhance the adherence of soil to minerals; therefore, we selected three soil bacteria (NL-7, NL-8, and NL-11) with higher performance for further investigation. Controlled experiments were used to investigate the effects of soil bacteria on soil characteristics (soil moisture content, soil pH, and soil exchangeable metal content) and soil adhesion to minerals. According to the findings, soil bacteria can improve the soil’s adhesion to minerals, improve the soil’s capacity to hold water, regulate soil pH, and solubilize and release exchangeable calcium, magnesium, sodium, and potassium ions. A structural equation modeling analysis was performed to thoroughly examine the relationship between soil characteristics and soil adherence to minerals. The analysis findings showed that soil moisture had the greatest total and direct positive impact on soil adherence to minerals. The most significant indirect impact of soil pH on soil adhesion to minerals is mainly caused by the exchangeable sodium and magnesium ions. Additionally, soil exchangeable sodium ions can only indirectly affect the adhesion of soil to minerals, which is accomplished by controlling soil exchangeable magnesium ions. Therefore, mineral-solubilizing soil bacteria primarily work by enhancing the soil’s water retention capacity to improve the soil’s adherence to minerals. Our study on the effect of mineral-solubilizing bacteria on the adhesion of soil and minerals demonstrates the significant potential of mineral-solubilizing bacteria in spray seeding greening, which will provide data and theoretical support for the formation, application, and promotion of mineral-solubilizing bacteria greening methods and gradually form a new set of scientific and efficient greening methods with Chinese characteristics.

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Section: Discussionmentioning

confidence: 99%

Mineral-Solubilizing Soil Bacteria Permanently Green Rocky Slopes by Enhancing Soil Adhesion to the Surface of Rocky Slopes

Wang

Tang

Liu

et al. 2022

Forests

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“…Sediaan harus memenuhi kriteria pH pada kulit yaitu antara 4,5-6,5. Hal ini menjadi salah satu faktor yang berikutnya digunakan sebagai acuan untuk sediaan yang aman dikulit dan tidak mengiritasi [23,27] e. Uji daya sebar Pengujian daya sebar ini bertujuan untuk mengamati dan menjamin bahwa sediaan lulur mampu tersebar merata pada pemberian ke kulit. Persyaratan yang memenuhi untuk nilai daya sebar untuk preparasi ataupun sediaan kosmetik topikal adalah 5-7 cm.…”

Section: Uji Nilai Phunclassified

Uji Sifat Fisik Sediaan Lulur Ekstrak Bayam Merah (Amaranthus tricolor L.) Serta Uji Efektivitas Kelembaban (Moisture) Dan Kehalusan (Evenness) Pada Kulit

Iskandar,

Tarigan,

Leny

et al. 2023

Maj. Farmasetika

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Sediaan lulur atau“body scrub” merupakan salah satu dari banyaknya sediaan kosmetik, lulur tersendiri berfungsi membuang ataupun mengangkat sel mati. Bayam merah (Amaranthus tricolor L.) adalah tanaman ataupun lebih tepatnya jenis sayuran yang biasa dikonsumsi sehari-hari yang bisa dimanfaatkan sebagai bahan baku dari sediaan lulur karena tingginya kandungan antosianin. Antosianin pada bayam merah bermanfaat sebagai antioksidan yang mampu menghambat radikal bebas. Bayam merah juga kaya akan kandungan vitamin A, Vitamin C, protein, kalsium, dan lainnya. Adapun tujuan dari studi ini adalah untuk mengetahui bayam merah yang dapat diformulasikan menjadi sediaan lulur atau body scrub yang memiliki karakteristik yang stabil dan mampu memperbaiki, meningkatkan kadar air pada kulit serta kehalusan pada kulit. Proses dan metode studi ini dengan mengekstraksi daun bayam merah (Amaranthus tricolor L.) dengan maserasi, kemudian formulasi sediaan lulur dibuat dengan beberapa variasi konsentrasi yaitu 0,5%, 1% dan 1,5%. Pengujian sediaan meliputi organoleptis, homogenitas, pH, daya sebar, iritasi, uji stabilitas, uji efektivitas kelembaban dan kehalusan dengan menggunakan instrumen skin analyzer pada kulit sukarelawan. Hasil studi yang dibuktikan dengan membandingkan hasil sebelum dan setelah cycling test menunjukan bahwa sedian lulur dari masing-masing formula memenuhi persyaratan organoleptis, homogenitas, pH lulur 5,7-5,9 (persyaratan pH sediaan ke kulit yaitu 4,5-6,5), daya sebar 5,3-5,6 (persyaratan 5-7 cm), tidak mengiritasi kulit, serta uji efektivitas kelembaban (moisture) dan kehalusan (evenness) pada kulit sukarelawan menunjukkan hasil analisis studi yang signifikan (p ≤ 0,05) pada F1, F2, F3 dan tidak menunjukkan hasil analisis yang signifikan (p ≥ 0,05) pada F0. Kesimpulan yang dapat diambil dari studi ini bahwa ekstrak daun bayam merah (Amaranthus tricolor L.) dapat diformulasikan serta memenuhi persyaratan uji sifat fisik sediaan lulur atau body scrub, tidak menyebabkan iritasi pada kulit, serta dapat memberikan kenaikan nilai persentase efek yang melembabkan kulit dan menghaluskan kulit dengan menggunakan skin analyzer.

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“…Others used simplified laboratory settings to investigate physical properties, e.g. Williams et al (35) studied liquid bridge formation between plates on the pore scale in different water-mucilage mixtures. Recently Landl et al (36) analyzed rhizodeposition patterns with the help of simulations at the plant scale, but not dealing with the pore scale explicitly.…”

Section: Introductionmentioning

confidence: 99%

Pore scale modeling of the mutual influence of roots and soil aggregation in the rhizosphere

Rötzer,

Prechtel,

Ray

2023

Front. Soil Sci.

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Investigating plant/root-soil interactions at different scales is crucial to advance the understanding of soil structure formation in the rhizosphere. To better comprehend the underlying interwoven processes an explicit, fully dynamic spatial and image-based modeling at the pore scale is a promising tool especially taking into account experimental limitations. We develop a modeling tool to investigate how soil aggregation, root growth and root exudates mutually interact with each other at the micro-scale. This allows the simultaneous simulation of the dynamic rearrangement of soil particles, the input and turnover of particulate organic matter, root growth and decay as well as the deposition, redistribution and decomposition of mucilage in the rhizosphere. The interactions are realized within a cellular automaton framework. The most stable configuration is determined by the amount and attractiveness of surface contacts between the particles, where organo-mineral associations preferably lead to the formation of soil aggregates. Their break-up can be induced by root growth or the degradation of gluing agents previously created after the decomposition of particulate organic matter and mucilage. We illustrate the capability of our model by simulating a full life cycle of a fine root in a two-dimensional, horizontal cross section through the soil. We evaluate various scenarios to identify the role of different drivers such as soil texture and mucilage. We quantify the displacement intensity of individual particles and the variations in local porosity due to the change in available pore space as influenced by the root growth and observe compaction, gap formation and a biopore evolution. The simulation results support that the deposition of mucilage is an important driver for structure formation in the rhizosphere. Although mucilage is degraded within a few days after exudation, it leads to a persistent stabilization of the aggregated structures for both textures in the vicinity of the root within a time frame of 1000 days. Local porosity changes are quantified for exudation periods of 1, 10 and 100 days and are already pronounced for short-term exudation of mucilage. This stabilization is significantly different from the structures encountered when only POM could trigger the evolution of gluing spots, and is still present after complete degradation of the root.

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Physical characterisation of chia mucilage polymeric gel and its implications on rhizosphere science - Integrating imaging, MRI, and modelling to gain insights into plant and microbial amended soils

Cited by 7 publications

References 48 publications

Mineral-Solubilizing Soil Bacteria Permanently Green Rocky Slopes by Enhancing Soil Adhesion to the Surface of Rocky Slopes

Mineral-Solubilizing Soil Bacteria Permanently Green Rocky Slopes by Enhancing Soil Adhesion to the Surface of Rocky Slopes

Uji Sifat Fisik Sediaan Lulur Ekstrak Bayam Merah (Amaranthus tricolor L.) Serta Uji Efektivitas Kelembaban (Moisture) Dan Kehalusan (Evenness) Pada Kulit

Pore scale modeling of the mutual influence of roots and soil aggregation in the rhizosphere

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