sieve tube वाक्य
उदाहरण वाक्य
मोबाइल
- Sieve tubes are formed from sieve-tube members laid end to end.
- They have a narrower diameter and are more elongated compared to sieve tube members.
- Each companion cell is derived from the same mother cell as its associated sieve tube member.
- Experiments to demonstrate bidirectional movement in a single sieve tube are technically very difficult to perform.
- Organic compounds such as sucrose produced by photosynthesis in leaves are distributed by the phloem sieve tube elements.
- Some experiments indicate that bidirectional movement may occur in a single sieve tube, whereas others do not.
- Phloem is a nutrient-conducting tissue composed of sieve tubes or sieve cells mixed with parenchyma and fibers.
- The companion cells, connected to the sieve tubes via plasmodesmata, are responsible for loading the phloem with sugars.
- If the mechanism of translocation operates according to pressure flow hypothesis, bidirectional movement in a single sieve tube is not possible.
- Sieve cells are typically associated with gymnosperms, because angiosperms have the more derived sieve tube members and companion cells in their phloem.
- Organic molecules such as sugars, amino acids, certain hormones, and even messenger RNAs are transported in the phloem through sieve tube elements.
- The ends of these cells are connected with other sieve tube members, and together they constitute the "'sieve tube " '.
- The ends of these cells are connected with other sieve tube members, and together they constitute the "'sieve tube " '.
- Each sieve tube element is normally associated with one or more nucleated companion cells, to which they are connected by plasmodesmata ( channels between the cells ).
- The pathogen, sandal spike phytoplasma, was first detected by pleomorphic and fragile organisms occupying relatively small areas within the sieve tubes ( phloem ) of the host plants.
- Sieve tubes are joined end-to-end with perforate end-plates between known as " sieve plates ", which allow transport of photosynthate between the sieve elements.
- The main function of the sieve tube is transport of carbohydrates, primarily sucrose, in the plant ( e . g ., from the leaves to the fruits and roots ).
- At the interface between two sieve tube members in angiosperms are "'sieve plates "', pores in the plant cell walls that facilitate transport of materials between them.
- Sieve tube members have no cell nucleus, ribosomes, or leaves, companion cells help move the sugar that is produced by photosynthesis from the mesophyll tissue into the sieve tube elements.
- Sieve tube members have no cell nucleus, ribosomes, or leaves, companion cells help move the sugar that is produced by photosynthesis from the mesophyll tissue into the sieve tube elements.
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