The cells undergo repeated anticlinal divisions to cope up with the rapidly enlarging internal tissues. It soon becomes four lobed. In each of the four lobes, some of the hypodermal cells begin to act as archesporial initials. The hypodermal cells then secrete a soft and pliant new cuticle, extending new microvilli into it as it is constructed. These cells act as sporangial initials. Immediately after ecdysis, entry of water into the individual through the gills or gut causes inflation of the body that expands the new cuticle to its final size ( Capen, 1972 , Mykles, 1980 , Taylor and Kier, 2003 ). Subsequent to the differentiation of parietal cells and sporogenous cells promoted by SPL/NZZ and BAM1/2, a number of genes are involved in the specialization of tapetal cells, including several leucine-rich repeat RLK genes, 2. 2. a subcutaneous, injection; a syringe for making such an injection. a. Epidermis: It is single layered and protective in function. There are generally two pairs of spore-containing sacs … Lying below the epidermis. (2) Development of anther and formation of microspores (Pollen grains) : The young anther consists of homogenous mass of paranchymatous cells surrounded by epidermis. A group of hypodermal cells are present at each corner of the young anther. The seam cells are lateral hypodermal blast cells that donate daughter nuclei to the hypodermal syncytium after each cell division, and eventually fuse in adults (Sulston and Horvitz, 1977). Of or relating to the hypodermis. hypodermal wall cell layers are replaced by microsporocyte-like cells (Hord et al., 2006). Anthers typically contain four somatic cell layers encircling the sporogenous cells within each anther locule (Goldberg et al., 1993). 1. hypodermic: [ hi″po-der´mik ] 1. beneath the skin; injected into subcutaneous tissues. Gradually the anther becomes a four-lobed structure, in each lobe hypodermal cells become differentiated by their shape and dense contents with distinct nucleus, these cells are called archespon'um or archesporial cells. The inner (L2) hypodermal cells divide periclinally to produce archesporial cells internally and primary parietal cells externally. Other articles where Anther is discussed: angiosperm: The androecium: …terminal saclike structures (microsporangia) called anthers. hypodermal: (hī′pə-dûr′məl) adj. We took advantage of the jam-1::gfp marker ( Mohler et al., 1998 ), which localizes to the adherens junctions surrounding the seam cells. An epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods. b. A very young anther is made up of homogeneous meristematic cells and more or less oblong in shape. Anther wall : The mature anther wall consists of the following layers a. Epidermis b. Endothecium c. Middle layers d. Tapetum. These divide by periclinal walls to form inner primary sporogenous cells or archesporium and outer primary parietal cells. In maize anther primordia, the outer (L1) layer produces the epidermis . The number of stamens comprised by the androecium is sometimes the same as the number of petals, but often the stamens are more numerous or fewer in number than the petals. Parietal cells lie immediately below the epidermis. Hypodermal definition: of the hypodermis | Meaning, pronunciation, translations and examples (a) Formation of sporangial wall derm n. 1. ] 1. beneath the skin ; injected into subcutaneous tissues undergo repeated anticlinal divisions to up! Somatic cell layers encircling the sporogenous cells within each anther locule ( Goldberg et al., 1993.! Periclinal walls to form inner primary sporogenous cells or archesporium and outer primary cells... 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