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The central cell, once fertilized by a sperm cell from the pollen becomes the first cell of the endosperm, and the egg cell once fertilized become the zygote that develops into the embryo. The gap in the integuments through which the pollen tube enters to deliver sperm to the egg is called the micropyle. The stalk attaching the ovule to the ...
The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of stigmatic papillae, the cells of which are receptive to pollen ...
Ectoparasite – a parasitic plant that has most of its mass outside of the host, the body and reproductive organs of the plant live outside of the host. Epigeal – living on the surface of the ground. See also terms for seeds. Epigean – occurring on the ground. Epigeic – plants with stolons on the ground. Epigeous – on the ground. Used ...
A region of tissue located between the surface cells and the vascular cylinder. [31] corticolous Growing on bark or on wood with the bark stripped off. Compare lignicolous. corymb. adj. corymbose. An inflorescence with branches arising at different points but reaching about the same height, giving the flower cluster a flat-topped appearance ...
It is derived from the fusion of both male and female parts (stamens and pistil) into a single organ. [1] The top part of the column is formed by the anther, which is covered by an anther cap . This means that the style and stigma of the pistil, with the filaments and one or more anthers, are all united.
Pollen tube elongation is an integral stage in the plant life cycle. The pollen tube acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms.
The individual cells of phloem are connected end-to-end, just as the sections of a pipe might be. As the plant grows, new vascular tissue differentiates in the growing tips of the plant. The new tissue is aligned with existing vascular tissue, maintaining its connection throughout the plant.
Microvilli are formed as cell extensions from the plasma membrane surface. Actin filaments, present in the cytosol, are most abundant near the cell surface.These filaments are thought to determine the shape and movement of the plasma membrane.