Polycaprolactone microcapsules containing citric acid and naringin for plant growth and sustainable agriculture: physico-chemical properties and release behavior

Cesari, Adriana Belén; Loureiro, Mónica V.; Vale, Mário; Yslas, Edith Inés; Dardanelli, Marta Susana; Marques, Ana C.

doi:10.1016/j.scitotenv.2019.135548

Cited by 36 publications

(14 citation statements)

References 53 publications

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“…The colonization of PGPR involves a complex process of signal exchange and mutual recognition. Flavonoids are the most extensive secondary metabolites in plants and play important roles as signaling molecules in plant-rhizobacteria interactions ( Cesari et al, 2020 ). Isoflavonoids represent a subclass of flavonoids and signaling molecules secreted by plants and are believed to play an important role in plant–microbe interactions ( Rolfe, 1988 ).…”

Section: Discussionmentioning

confidence: 99%

Phosphate-Solubilizing Pseudomonas sp. Strain WS32 Rhizosphere Colonization-Induced Expression Changes in Wheat Roots

Cai

et al. 2022

Front. Microbiol.

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Rhizosphere colonization is a pre-requisite for the favorable application of plant growth-promoting rhizobacteria (PGPR). Exchange and mutual recognition of signaling molecules occur frequently between plants and microbes. Here, the luciferase luxAB gene was electrotransformed into the phosphate-solubilizing strain Pseudomonas sp. WS32, a type of plant growth-promoting rhizobacterium with specific affinity for wheat. A labeled WS32 strain (WS32-L) was applied to determine the temporal and spatial traits of colonization within the wheat rhizosphere using rhizoboxes experimentation under natural condition. The effects of colonization on wheat root development and seedling growth were evaluated, and RNA sequencing (RNA-seq) was performed to explore the transcriptional changes that occur in wheat roots under WS32 colonization. The results showed that WS32-L could survive in the wheat rhizosphere for long periods and could expand into new zones following wheat root extension. Significant increases in seedling fresh and dry weight, root fresh and dry weight, root surface area, number of root tips, and phosphorus accumulation in the wheat leaves occurred in response to WS32 rhizosphere colonization. RNA-seq analysis showed that a total of 1485 genes in wheat roots were differentially expressed between the inoculated conditions and the uninoculated conditions. Most of the transcriptional changes occurred for genes annotated to the following functional categories: “phosphorus and other nutrient transport,” “hormone metabolism and organic acid secretion,” “flavonoid signal recognition,” “membrane transport,” and “transcription factor regulation.” These results are therefore valuable to future studies focused on the molecular mechanisms underlying the growth-promoting activities of PGPR on their host plants.

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Section: Discussionmentioning

confidence: 99%

Phosphate-Solubilizing Pseudomonas sp. Strain WS32 Rhizosphere Colonization-Induced Expression Changes in Wheat Roots

Cai

et al. 2022

Front. Microbiol.

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“…Cesari et al obtained PCL microcapsules with the objective of encapsulating signal molecules, such as citric acid and naringin, an organic acid, and a flavonoid. This encapsulation was motivated to maintain the stability and activity of these signal molecules and to allow slow or controlled release by a period of time, selected according to the needs of plants (Figure 44) [134]. This study made it possible to manufacture intelligent materials for sustainable agricultural practices.…”

Section: (B) Poly(lactic Acid)mentioning

confidence: 99%

Biodegradable Polymers for Microencapsulation Systems

Parente

Sousa

Marques

et al. 2022

Advances in Polymer Technology

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Environmentally friendly alternatives have become sought after upon the development of scientific research and industrial processes. Recent trends suggest biodegradable polymers as the most promising solution for synthetic microcapsule systems. Safety, efficiency, biocompatibility, and biodegradability are some of the properties that biodegradable systems in microencapsulation can provide for a broad spectrum of applications. The controlled release of encapsulated active agents is a research field that, over the years, has been constantly innovating due to the promising applications in the areas of pharmaceutical, cosmetic, textile industry, among others. This article presents an overview of different polymers with potential for microcapsule synthesis, namely, biodegradable polymers. First, natural polymers are discussed, which are divided into two categories: polysaccharide-based polymers (cellulose, starch, chitosan, and alginate) and protein polymers (gelatin). Second, synthetic polymers are described, where biodegradable polymers such as polyesters, polyamides, among others appear as examples. For each polymer, this review presents its origin, relevant properties, applications, and examples found in the literature regarding its use in biodegradable microencapsulation systems.

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“…The PCL layer spectra shows the characteristic peaks at 1163 and 1239 cm À1 , ascribed to COC stretching vibration, peaks at 1401 and 1365 cm À1 were attributed to CH 2 bending modes, a characteristic sharp peak at 1720 cm À1 , assigned to the carbonyl stretching vibration and broader CH 2 stretching peaks at 2943 and 2867 cm À1. 66,67 The PVA_KF nanofibrous layer yield absorption peaks at 2979 cm À1 , attributed to CH 2 stretching, the peak at 2893 cm À1 was assigned to CH stretching, the characteristic peak at 1371 cm À1 from residual CHO-AC from vinyl acetate, the observed C-H bending, C-O and C-C stretching peaks between 1250 and 850 cm À1 represent the characteristic fingerprint region of saccharide structure and stretching modes of carbohydrates. 22,68,69 The spectra of double-layered materials which contained the pigment are represented in dotted lines in Figure 2, with no evident peak shift, only an increased intensity at specific wavelengths.…”

Section: Atr-ftir Analysismentioning

confidence: 99%

Novel functional material incorporating flexirubin‐type pigment in polyvinyl alcohol_kefiran/polycaprolactone nanofibers

Amorim

Fangueiro

Gouveia

2022

J of Applied Polymer Sci

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In this study, needleless electrospinning technology was used to obtain flexirubin (F)‐loaded polyvinyl alcohol (PVA)_kefiran (KF)/polycaprolactone (PCL) electrospun nanofibers. The SEM images of PVA_KF_ F and PCL_F nanofibers displayed beadless morphology with average diameters of 211.90 ± 96.08 and 1610.71 ± 996.68 nm, respectively. FTIR‐ATR analysis revealed increased intensity at specific wavelengths, after pigment incorporation. The high porosity exhibited by each layer and the mechanical properties of the double‐layered nanofibrous material remained unaffected after flexirubin‐type pigment incorporation. In addition, PVA_KF_F/PCL_F nanofibers showed antioxidant activity of 41.03 ± 0.29%, evaluated by the scavenging of the ABTS radical as well as the ability to reduce enzymatic browning of apple slices. Thus, we believe that the fabricated PVA_KF_F/PCL_F double‐layered material can be considered for application in active food packaging systems.

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Polycaprolactone microcapsules containing citric acid and naringin for plant growth and sustainable agriculture: physico-chemical properties and release behavior

Cited by 36 publications

References 53 publications

Phosphate-Solubilizing Pseudomonas sp. Strain WS32 Rhizosphere Colonization-Induced Expression Changes in Wheat Roots

Phosphate-Solubilizing Pseudomonas sp. Strain WS32 Rhizosphere Colonization-Induced Expression Changes in Wheat Roots

Biodegradable Polymers for Microencapsulation Systems

Novel functional material incorporating flexirubin‐type pigment in polyvinyl alcohol_kefiran/polycaprolactone nanofibers

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