tracheid वाक्य
उदाहरण वाक्य
मोबाइल
- While wider tracheids with robust walls make it possible to achieve higher water transport pressures, this increases the problem of cavitation.
- For this reason, pits in tracheid walls have very small diameters, to prevent air entering and allowing bubbles to nucleate.
- The tracheids of earlywood formed at the beginning of a growing season have large radial sizes and smaller, thinner cell walls.
- Tracheid length might be slightly shorter than either parent, even though tracheid length in southern pines usually does not differ significantly.
- Tracheid length might be slightly shorter than either parent, even though tracheid length in southern pines usually does not differ significantly.
- Now, that fine-ground mass, under magnification, is a series of disaggregated tracheids _ water-conducting plant cells.
- The structure of the tracheids in the long lateral roots of white spruce varies with soil nitrogen availability ( Krasowski and Owens 1999 ).
- Tracheids also have pits, but only vessel elements have openings at both ends that connect individual vessel elements to form a continuous tubular vessel.
- Damage to a tracheid's wall almost inevitably leads to air leaking in and cavitation, hence the importance of many tracheids working in parallel.
- Damage to a tracheid's wall almost inevitably leads to air leaking in and cavitation, hence the importance of many tracheids working in parallel.
- Then, the first tracheids of the transition zone are formed, where the radial size of cells and thickness of their cell walls changes considerably.
- Their stems are similar in structure to woody dicots except that most gymnosperms produce only tracheids in their xylem, not the vessels found in dicots.
- During evolution the strength of the tracheid cell walls was enhanced, the ability to conduct water was lost and the size of the pits was reduced.
- He performed a comparative analyses of the vasculatures of living and fossil gymnosperms and came to the conclusion that the storage parenchyma has been derived from tracheids.
- However, by the time they become competent to conduct water, all xylem tracheids and vessels have lost their cytoplasm and the cells are therefore functionally dead.
- Wider tracheids allow water to be transported faster, but the overall transport rate depends also on the overall cross-sectional area of the xylem bundle itself.
- Both prostrate and upright stems have a central strand of conducting tissue which contains simple tracheids, so that " Stockmansella " is a vascular plant.
- The size of tracheids is limited as they comprise a single cell; this limits their length, which in turn limits their maximum useful diameter to 80 ?m.
- Nitrogen availability in the rooting medium also affects the size and structure of tracheids formed in the long lateral roots of white spruce ( Krasowski and Owens 1999 ).
- A tracheid, once cavitated, cannot have its embolism removed and return to service ( except in a few advanced angiosperms which have developed a mechanism of doing so ).
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