(n.) That portion of fibrovascular bundles which corresponds to the inner bark; the liber tissue; -- distinguished from xylem.
Example Sentences:
(1) A computer model predicts that SA should move rapidly in phloem.
(2) Pinwheel inclusions (PWs) were found in cells of callus tissue derived from explants of secondary phloem parenchyma of carrot (Daucus carota) storage root and grown on a basal medium containing zeatin and indoleacetic acid or coconut milk, naphthalene acetic acid, or combinations of these.
(3) Pumpkin phloem exudate contains two abundant phloem proteins: PP1 is a 96-kD protein that forms polymeric filaments in vivo, and PP2 is a 48-kD dimeric lectin.
(4) The labelled ethephon is translocated in a higher concentration in the phloem after foliar dissepiment application.
(5) When the CoYMV promoter is used to drive expression of the beta-glucuronidase reporter gene in stably transformed tobacco plants, beta-glucuronidase activity occurs primarily in the phloem, the phloem-associated cells, and the axial parenchyma of roots, stems, leaves, and flowers.
(6) Virus particles were present in all cell types of the epidermis, mesophyll, phloem, and xylem.
(7) Polyclonal antibodies raised against pumpkin phloem exudate were used to isolate several cDNAs corresponding to PP1 and PP2.
(8) For both cultivars, the phloem, mesophyll, parenchyma and epidermis were the most susceptible tissues to bacterial attack.
(9) The occurrence of annulate lamellae (AL) in differentiating phloem of Sonchus oleraceus (Compositae) singly infected with sowthistle yellow vein virus (SYVV) and doubly infected with a combination of SYVV and beet yellow stunt virus is documented by electron microscopy.
(10) BYDV, a phloem restricted luteovirus, occurs in very low concentration in grasses.
(11) Ultrastructural examination of leaf tissue of Nicotiana benthamiana infected with Indian cassava mosaic virus (ICMV) revealed abnormalities in phloem and, occasionally, xylem cells.
(12) The possibility of a symplastic pathway of solute movement from the phloem to the syncytium is suggested.
(13) Sieve cells and sieve tube members can be macerated from the phloem of various organs of woody and herbaceous species by autoclaving the tissue in a mild macerating medium.
(14) In transgenic tobacco the GS3A promoter directed GUS expression in the phloem cells of the vasculature in leaves, stems and roots.
(15) Light and electron microscopical observations of the cells of the phloem of Cucurbita maxima have shown that two distinct types of P-protein bodies are formed: a larger type which arises as fine fibrils and a smaller type which apparently arises as groups of tubules.
(16) A biochemical and cytochemical study has been made of the distribution of ATPase in mature and differentiating phloem cells of Nicotiana tabacum and of the substrate specificity and effects of fixation on enzyme activity.
(17) We report here that a soybean 62-kD sucrose binding protein is associated with the plasma membrane of several cell types engaged in sucrose transport, including the mesophyll cells of young sink leaves, the companion cells of mature phloem, and the cells of the developing cotyledons.
(18) It also adhered, though in much smaller numbers, to the uncut surfaces of mesophyll, epidermal, and phloem cell walls.
(19) With the exception of the phloem and the crown of the parenchyma, which borders the medullary lacuna, the walls of the tissues of both treated and untreated straw were lignified.
(20) The content of the vitamins in the phloem depends on the quantity of the yeast organisms in it.
Procambium
Definition:
(n.) The young tissue of a fibrovascular bundle before its component cells have begun to be differentiated.
Example Sentences:
(1) Light and electron microscopical studies showed that, during preculture, procambium cells of embryos became highly susceptible to Agrobacterium infection.
(2) Lateral and intermediate veins are initiated in this central layer, most often by divisions which contribute daughter cells to both the procambium and the ground meristem.