| 词汇 | example_english_sieve-tube |
| 释义 | sieve tubecollocation in Englishmeanings of sieveand tubeThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with tube. sieve noun[C] uk /sɪv/ us /sɪv/ a tool consisting of a wood, plastic, or metal frame with a wire or plastic net attached to it. You use it either to separate solids from a liquid, or you rub larger solids through it to make ... See more at sieve tube noun uk /tʃuːb/ us /tuːb/ a long cylinder made from plastic, metal, rubber, or glass, especially used for moving or containing liquids ... See more at tube Examples of sieve tubeThese 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. In leaves, companion cells help move the sugar that is produced by photosynthesis from the mesophyll tissue into the sievetube elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Sieve cells are typically associated with gymnosperms, because angiosperms have the more derived sievetube members and companion cells in their phloem. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They have a narrower diameter and are more elongated compared to sievetube members. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The ends of these cells are connected with other sievetube members, and together they constitute the sievetube. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each sievetube element is normally associated with one or more nucleate companion cells, to which they are connected by plasmodesmata (channels between the cells). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Organic compounds such as sucrose produced by photosynthesis in leaves are distributed by the phloem sievetube elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The sievetube elements lack nuclei and ribosomes, and their metabolism and functions are regulated by the adjacent nucleate companion cells. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Now they are unable to move back, but can proceed through wider plasmodesmata into the sievetube element. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At the interface between two sievetube members in angiosperms are sieve plates, pores in the plant cell walls that facilitate transport of materials between them. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Phloem is a nutrient-conducting tissue composed of sieve tubes or sieve cells mixed with parenchyma and fibers. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The companion cells, connected to the sieve tubes via plasmodesmata, are responsible for loading the phloem with sugars. 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. Want to learn more? Go to the definition of sieve Go to the definition of tube See other collocations with tube |
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