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Plant cells are the cells present in green plants, photosynthetic eukaryotes of the kingdom Plantae. Their distinctive features include primary cell walls containing cellulose, hemicelluloses and pectin, the presence of plastids with the capability to perform photosynthesis and store starch, a large vacuole that regulates turgor pressure, the ...
Plant cell walls vary from 0.1 to several μm in thickness. Layers Cell wall in multicellular plants – its different layers and their placement with respect to protoplasm (highly diagrammatic) Molecular structure of the primary cell wall in plants. Up to three strata or layers may be found in plant cell walls:
Pectin is composed of complex polysaccharides that are present in the primary cell walls of a plant, and are abundant in the green parts of terrestrial plants. Pectin is the principal component of the middle lamella, where it binds cells. Pectin is deposited by exocytosis into the cell wall via vesicles produced in the Golgi apparatus.
5) n, a polysaccharide consisting of a linear chain of several hundred to many thousands of β (1→4) linked D -glucose units. [3] [4] Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. Some species of bacteria secrete it to form biofilms. [5]
The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes (i.e. egg cells ), the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells. The term gynoecium is also used by botanists to refer to a cluster of archegonia ...
The secondary cell wall is a structure found in many plant cells, located between the primary cell wall and the plasma membrane. The cell starts producing the secondary cell wall after the primary cell wall is complete and the cell has stopped expanding. [1] It is most prevalent in the Ground tissue found in vascular plants, with Collenchyma ...
The red color of beets comes from betalain pigments. Betalains are a class of red and yellow tyrosine -derived pigments found in plants of the order Caryophyllales, where they replace anthocyanin pigments. Betalains also occur in some higher order fungi. [1] They are most often noticeable in the petals of flowers, but may color the fruits ...
Living order of Lycophytes and ferns are taken from Christenhusz et al. 2011b and Pteridophyte Phylogeny Group. Living orders of Gymnosperms are added from Christenhusz et al. 2011a [4] while extinct orders are from Anderson, Anderson & Cleal 2007.