Evolution And Diversity Of Plant Cell Walls From Algae To Flowering Plants Pdf

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A cell wall is a structural layer surrounding some types of cells , just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.

Although plants and many algae e.

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Evolution and diversity of plant cell walls: from algae to flowering plants.

Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. Read article at publisher's site DOI : J Eukaryot Microbiol, 5 Glycobiology, 1 Science, Mol Biol Evol, 5

Metrics details. A number of innovations underlie the origin of rapid reproductive cycles in angiosperms. A critical early step involved the modification of an ancestrally short and slow-growing pollen tube for faster and longer distance transport of sperm to egg. Callose synthesis is mediated by callose synthase CalS. Of 12 CalS gene family members in Arabidopsis , only one CalS5 has been directly linked to pollen tube callose. CalS5 orthologues are present in several monocot and eudicot genomes, but little is known about the evolutionary origin of CalS5 or what its ancestral function may have been. CalS transcripts were detected in pollen tubes of several species within Nymphaeales and Austrobaileyales, and comparative analyses with a phylogenetically diverse group of sequenced genomes indicated homology to CalS5.

Cell wall evolution and diversity

Lacharme , Le palnt de riz. Rebouillat and A. DOI : Coudert and C. Perin , Genetic control of root development in rice, the model cereal , Trends in Plant Science , vol. Ray and. Evert , Esau's Plant Anatomy.

Download stagem2-gt. Macroalgae and land plants share convergent evolutionary traits, such as multicellularity and a polysaccharide-rich cell-wall surrounding their cells. These two features are intrinsically interlinked as the development of an adherent cell-wall allowed the transition from cellular autonomy to cellular cooperation, and therefore multicellularity. For land plants we have an extensive understanding of the structures and functions of the cell wall , but such knowledge is scarce in macroalgae. Being evolutionary distant from land plants, marine algae offer attractive models to study the bases of developmental mechanisms in eukaryotes. My research interests are focused on marine algal cell walls in relation to their biological functions.

Current challenges in plant cell walls View all 30 Articles. Plant cell walls display a considerable degree of diversity in their compositions and molecular architectures. In some cases the functional significance of a particular cell wall type appears to be easy to discern: secondary cells walls are often reinforced with lignin that provides durability; the thin cell walls of pollen tubes have particular compositions that enable their tip growth; lupin seed cell walls are characteristically thickened with galactan used as a storage polysaccharide. However, more frequently the evolutionary mechanisms and selection pressures that underpin cell wall diversity and evolution are unclear. For diverse green plants chlorophytes and streptophytes the rapidly increasing availability of transcriptome and genome data sets, the development of methods for cell wall analyses which require less material for analysis, and expansion of molecular probe sets, are providing new insights into the diversity and occurrence of cell wall polysaccharides and associated biosynthetic genes. Such research is important for refining our understanding of some of the fundamental processes that enabled plants to colonize land and to subsequently radiate so comprehensively.


All photosynthetic multicellular Eukaryotes, including land plants and algae, have cells that are surrounded by a dynamic, complex, carbohydrate-rich cell wall. This has resulted in compositional variation that is dependent on developmental stage, cell type, and season.


Evolution and diversity of plant cell walls: from algae to flowering plants.

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Duplicate citations

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