Cell Wall Composition and Extract

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Developmental Physiology, Biochemistry, and Molecular Biology".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 4786

Special Issue Editor


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Guest Editor
Laboratoire Peirene (EA7500), Faculté des Sciences et Techniques, Université de Limoges, 123, avenue Albert Thomas, F-87060 Limoges CEDEX, France
Interests: plant cell wall; biotic and abiotic stress; valorization of polysaccharides

Special Issue Information

Dear Colleagues,

The plant cell wall constitutes a complex structure whose components (polysaccharides, proteins, minerals, etc.) display a large degree of diversity among organisms and tissues. In addition, its structure and composition evolve during the lifecycle of the cell: first, the pectin-enriched middle lamella formed during cell division contributes to cell-to-cell adhesion; second, the primary cell wall, mainly composed of cellulose microfibrils surrounded with hemicellulose and pectin chains, is involved in the control of the growth and shape of the cell. Finally, the secondary cell wall, notably composed of lignin deposits, endows some tissues (e.g., xylem) with tensile strength. This rigidity allows the plant to stand upright and helps the conducting tissues to withstand the sap pressure. In addition, due to its peripheral position, the cell wall is the favored location for exchange processes between the cell and its environment and constitutes the primary barrier against exogenous attacks. Therefore, the cell wall is a dynamic compartment that can be modified in response to various environmental effectors, more particularly in case of stress. Due to this diversity, extracts of plant cell walls also constitute a large repertoire of bioactive molecules whose diverse characteristics (antioxidant, gelling properties, etc.) justify their uses in numerous domains, such as the biomaterial and biofuel industries and health and medical applications.

This Special Issue aims at presenting new insights into the roles played by plant cell walls during plant growth and development, along with their contribution to stress resistance (either biotic or abiotic stress). Biological activities of plant cell wall extracts are also of interest because of their numerous potential applications. Special features concerning horticultural plants are welcome.

Dr. Céline Faugeron-Girard
Guest Editor

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Keywords

  • cell wall
  • structural polysaccharides
  • stress resistance
  • cellulose
  • hemicellulose
  • pectin

Published Papers (2 papers)

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Research

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14 pages, 14388 KiB  
Article
Impact of Pseudomonas sp. SVB-B33 on Stress- and Cell Wall-Related Genes in Roots and Leaves of Hemp under Salinity
by Roberto Berni, Jean-Francois Hausman, Silas Villas-Boas and Gea Guerriero
Horticulturae 2022, 8(4), 336; https://doi.org/10.3390/horticulturae8040336 - 15 Apr 2022
Cited by 5 | Viewed by 2016
Abstract
Salinity is a type of abiotic stress that negatively affects plant growth and development. Textile hemp (Cannabis sativa L.) is an important multi-purpose crop that shows sensitivity to salt stress in a genotype- and developmental stage-dependent manner. The root and shoot biomasses [...] Read more.
Salinity is a type of abiotic stress that negatively affects plant growth and development. Textile hemp (Cannabis sativa L.) is an important multi-purpose crop that shows sensitivity to salt stress in a genotype- and developmental stage-dependent manner. The root and shoot biomasses decrease in the presence of NaCl during vegetative growth and several stress-responsive genes are activated. Finding environmentally friendly ways to increase plant health and resilience to exogenous stresses is important for a sustainable agriculture. In this context, the use of beneficial bacteria, collectively referred to as plant growth-promoting bacteria (PGPB), is becoming an attractive and emergent agricultural strategy. In this study, data are provided on the effects of a Pseudomonas isolate (Pseudomonas sp. SVB-B33) phylogenetically closely related to P. psychrotolerans applied via roots to salt-stressed hemp. The application of both living and dead bacteria impacts the fresh weight of the root biomass, as well as the expression of several stress-related genes in roots and leaves. These results pave the way to future investigations on the use of Pseudomonas sp. SVB-B33 in combination with silica to mitigate stress symptoms and increase the resilience to other forms of exogenous stresses in textile hemp. Full article
(This article belongs to the Special Issue Cell Wall Composition and Extract)
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Review

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9 pages, 810 KiB  
Review
Rhamnogalacturonan Endolyase Family 4 Enzymes: An Update on Their Importance in the Fruit Ripening Process
by Luis Morales-Quintana, Patricio Ramos and Angela Méndez-Yáñez
Horticulturae 2022, 8(5), 465; https://doi.org/10.3390/horticulturae8050465 - 21 May 2022
Cited by 3 | Viewed by 2111
Abstract
Fruit ripening is a process that produces fruit with top sensory qualities that are ideal for consumption. For the plant, the final objective is seed dispersal. One of the fruit characteristics observed by consumers is texture, which is related to the ripening and [...] Read more.
Fruit ripening is a process that produces fruit with top sensory qualities that are ideal for consumption. For the plant, the final objective is seed dispersal. One of the fruit characteristics observed by consumers is texture, which is related to the ripening and softening of the fruit. Controlled and orchestrated events occur to regulate the expression of genes involved in disassembling and solubilizing the cell wall. Studies have shown that changes in pectins are closely related to the loss of firmness and fruit softening. For this reason, studying the mechanisms and enzymes that act on pectins could help to elucidate the molecular events that occur in the fruit. This paper provides a review of the enzyme rhamnogalacturonan endolyase (RGL; EC 4.2.2.23), which is responsible for cleavage of the pectin rhamnogalacturonan I (RGL-I) between rhamnose (Rha) and galacturonic acid (GalA) through the mechanism of β-elimination during fruit ripening. RGL promotes the loosening and weakening of the cell wall and exposes the backbone of the polysaccharide to the action of other enzymes. Investigations into RGL and its relationship with fruit ripening have reliably demonstrated that this enzyme has an important role in this process. Full article
(This article belongs to the Special Issue Cell Wall Composition and Extract)
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