xylem phloem

Definitions

  • 1) botany A vascular tissue in land plants primarily responsible for the distribution of water and minerals taken up by the roots; also the primary component of wood.
  • 2) The tissue of vascular plants that conducts water and minerals, provides support, and consists of tracheary elements and parenchyma cells. Woody tissue is made of secondary xylem produced by the vascular cambium.
  • 3) (Bot.) That portion of a fibrovascular bundle which has developed, or will develop, into wood cells; -- distinguished from phloëm.
  • 4) the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
  • 5) In botany, that part of a fibrovascular bundle which contains ducts or tracheids—that is, the woody part, as distinguished from the phloëm, or bast part. Compare phloëm. See protoxylem, leptoxylem.

Definitions

  • 1) botany A vascular tissue in land plants primarily responsible for the distribution of sugars and nutrients manufactured in the shoot.
  • 2) The tissue of vascular plants that conducts food produced by photosynthesis to all parts of the plant and consists of sieve elements, fibers, and parenchyma.
  • 3) (Bot.) That portion of fibrovascular bundles which corresponds to the inner bark; the liber tissue; -- distinguished from xylem.
  • 4) (botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes
  • 5) In botany, the bast or liber portion of a vascular bundle, or the region of a vascular bundle or axis with secondary thickening which contains sieve-tubes. Compare xylem.

Examples

  • 1) Thus xylem is commercially important as a source of wood and fibres.
  • 2) Each year a new ring of xylem is added called the annual ring.
  • 3) xylem tissue consists of long continuous tubes formed from columns of cells in which the horizontal cross walls have disintegrated and the cell contents have died
  • 4) As more water vapor molecules exit the plant, the remaining water molecules tug on each other and will pull an entire column of water throughout the plant body through special tissues called xylem during the process of transpiration.
  • 5) On the other hand, leafhoppers and planthoppers, that feed at least half the time on the deeper layer of conductive tissues (called the xylem), get knocked down.
  • 6) In dicot roots the xylem is the tissue at the core (Figure 5.3).
  • 7) The xylem is the part of the vascular system that carries water and nutrients from the roots to the leaves.
  • 8) In the xylem are a number of vessels (_C_, _tr. _) at once distinguishable from the other cells by their definite form, firm walls, and empty cavity.
  • 9) In nature, trees use water in tubular tissues, called xylem, like ropes that pull more water out of the ground, delivering it to leaves.
  • 10) This tissue is comprised of two types of specialized cells called xylem and phloem.
  • 11) (AL-jee) Primitive organisms that contain chlorophyll but do not have structures, such as xylem and phloem, to transport fluids.
  • 12) ‘Generally, a high recycling from xylem to phloem was observed in the old parts of the shoot.’
  • 13) ‘The conducting tissues within the vascular bundles are the xylem and phloem.’
  • 14) ‘The estimation of the water uptake and water flow in xylem and phloem was outlined by Jiang et al..’
  • 15) ‘In multicellular plants fluxes to and from roots via xylem and phloem further complicate the situation.’
  • 16) ‘Stained cells corresponding to immature xylem were detected in vascular bundles of flowers and fruits.’

Examples

  • 1) Before I met Lena, three years ago, I devoted myself entirely to opening young minds onto the mysteries of xylem and phloem.
  • 2) After a female borer lays its eggs on an ash tree, the larvae burrow through the bark and feed on vascular tissue called the phloem, cutting off the tree's supply of nutrients and starving it to death.
  • 3) In dicots the phloem is a distinct layer separated from the xylem by a thin layer of cambial tissue
  • 4) There is a ring of small cambium cells around this merging into the phloem, which is composed of irregular cells, with pretty thick, but soft walls.
  • 5) In the end, she would help him form cambia on the outside of his phloem.
  • 6) The disease is spread from plant to plant primarily by phloem feeding leafhoppers.
  • 7) —In autumn, with a great creaking and a snapping of twigs, they break away from trunks grown thick with bark and phloem, which become husks with jagged tips, or later often topple from sheer grief.
  • 8) The parasitic plants germinate on white fir branches and force their roots into the phloem of the host branch.
  • 9) The leafhopper acquires the phytoplasma while feeding by inserting its stylet a long, slender hollow feeding structure into the phloem of infected plants and withdrawing the phytoplasma with the plant sap.
  • 10) Phytoplasmas live in the phloem food conducting tissues of their host plant.
  • 11) ‘The conducting tissues within the vascular bundles are the xylem and phloem.’
  • 12) ‘For the stem, the outermost green tissue, including both phloem and cambium were estimated.’
  • 13) ‘Root tissue samples are hereafter referred to as periderm, phloem and xylem.’
  • 14) ‘Subsequently, this cambium produces both wound xylem and wound phloem and thus contributes to further thickening.’
  • 15) ‘Formation of phloem and early xylem was directly related to fruitlet size.’
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