| 词汇 | endodermis |
| 释义 | endodermis noun[ S ] biology specializeduk /ˌen.dəʊˈdɜː.mɪs/ us /ˌen.doʊˈdɝː.mɪs/ a layer of cells in a plant's root that is the inside part of the cortex(= the part under the exodermis and outer layer): （植物根部的）内皮层 The only way for the water to cross the endodermis is through the cytoplasm of these cells.水穿过内皮层的唯一途径是通过这些细胞的细胞质。 She had been describing a plant's epidermis and endodermis - osmotic pumps moving water across the root. The cells in the endodermis have a thick, waterproof, waxy band of suberin in their cell walls. In the root, water which has crossed the cortex, endodermis and pericycle moves into the xylem vessels through the pits in their walls. The researchers discovered that a protein molecule moves from the vascular cylinder to the endodermis, an inner skin within the root. Parts of plants axil bark bilobed blade bulb caning cascara sagrada corolla exodermis inflorescence knot pistil rosella seed coat seed pod sessile shaw sting taproot tubule Examples of endodermisendodermis Outside the stele lies the endodermis, which is the innermost cell layer of the cortex. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Instead, water must traverse the endodermis through the symplast. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the absence of secondary growth (most monocotyledons and a few eudicots), the endodermis commonly undergoes certain wall modifications. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Around the vascular tissue there might have been an endodermis that regulated the flow of water into and out of the vascular system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Cell walls of the epidermis and endodermis may also contain suberin or cutin, two polyester polymers that function as permeability barriers. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The endodermis is a single layer of cells between the cortex and the pericycle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In many of these plants the endodermis is later discarded, together with the cortex, when the periderm develops from the pericycle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The endodermis is the boundary between the cortex and the stele. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The endodermis helps regulate the movement of water, ions and hormones into and out of the vascular system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Specialised water transport tissues soon evolved in the form of hydroids, tracheids, then secondary xylem, followed by an endodermis and ultimately vessels. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The long stylet allows the nematode to feed on the inner cortex and endodermis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It moves these solutes from epidermis cells through the cortex into the endodermis and eventually the pericycle, where it can be moved into the xylem for long distance transport. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They are diploblastic, with two true tissue layers an epidermis (ectodermis) and a gastrodermis (endodermis), with a jelly-like mesoglea filling the area between the two true tissue layers. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Water moving into or out of the xylem, which is part of the apoplast, can thereby be regulated since it must enter the symplast in the endodermis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Some plants have a large number of amyloplasts (starch containing organelles) in their endodermal cells, in which case the endodermis may be called a starch sheath. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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