(1) Results: The microscopical characteristics such phellem, cortex, phloem and xylem were observed in the transverse section of the stem.

(2) In the axial systems, the phloem consists of sieve cells, phloem parenchyma cells, albuminous cell and phloem fibers. In the radial systems, it consists of phloem rays.

(3) Between primary xylem and primary phloem there are 2—3 layers of parenchymatous cells, regularly or irregularly arranged, but no cambial zone can be recognized.

(4) The sieve tube elements of the secondary phloem were relatively shorter, with simple sieve plates in the slightly inclined to almost horizontal end walls.

(5) Sugar transport in phloem depends on sugar transporters, and sugar transporters have dual functions, i.

(6) Primary phloem PHLOEM derived from the procambium in the young plant.

(7) While cultivated Radix Saposhnikovia had phloem transverse section of root with oil tube lining up 10-11 rings and xylem vessel with distinct annual ring.

(8) In vascular plants, the xylem and phloem serve to translocate such substances.

(9) Comparative anatomy of the secondary phloem of the stem in Cephalotaxus.

(10) Protophloem The first - formed PRIMARY PHLOEM, differentiated from the procambium in the region just behind the meristem.

(11) There are some sclerenchymatous cells outside the phloem of each vascular bundle to increase the supporting force of the petiole.

(12) There were phloem fiber bundle of stem outside vascular bundles.

(13) In the phloem laticifer disperse distribution likely ring, meanwhile, in the pith also disperse laticifer and secretory canal.

(14) In the axial system the phloem consists of sieve cells, phloem parenchyma cells, albuminous cells and phloem fibers.

(15) The ultrastructure of the secondary phloem of Rhus verniciflua Stokes was studies.

(16) So the aloin cells were special phloem parenchyma cells because they shared the same origin with the other phloem cells.

(17) Result: The phellem, phloem and xylem of wild bupleurum scorzonerifolium are different from those in the pharmacopoeia .

(18) But the speed of transmission is high for the transport of a chemical signal in the phloem.

(19) These cells stemmed from the promeristem, are the special phloem parenchyma cells.

(20) Fusarium spp. and Sporotrichum spp...It was also found that except the P. bolleana, the moisture of the phloem of the other three trees were higher than the healthy ones in Ningxia.

(21) Sieve area pores of mature sieve elements are lined with the thicker callose and plugged with the electron-opaque P-protein, which may be the response to wounding on the phloem in preparing samples.

(22) The area of duct is bigger than that of phloem in flag leaf and leaf sheath , but smaller in the first internode, primary branch and secondary branch.

(23) Morphological studies indicated that, in general, it needed 10 to 15 minutes for the stylet to reach the phloem and feed.

(24) The primary cambium is found in the stem and root between the phloem and xylem cells, and by division gives rise to the secondary phloem and xylem in woody dicotyledonous plants.

(25) Results The structures of the aloe leaves were basically similar as characterized by the presence of the large, well developed parenchymatous cells in the phloem pole where anthraquinones were stored.

(26) The origin of the midvein calli developed mainly from the vascular cylinder, the palisade tissues and the phloem parenchyma cells.

(27) Vascular cambium The ring of CAMBIUM formed by the activity of the interfascicular cambium and the intrafascicular cambium that gives rise to secondary xylem and secondary phloem.

(28) The main constituents of the axial system are sieve cells, phloem parenchyma cells, crystalliferous cells and radial plates.

(29) The vascular bundle consists of vascular bundle sheath, xylem, phloem and big parenchymatous cells.

(30) The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.

(31) The stele includes all primary tissues derived from the procambium consists of pericycle, phloem and xylem.

(32) Both xylem and phloem form a continuous branched system in the whole plant body.

(33) Under the condition of shading in seedling period, the lignified degree of cotton stem declined, cambium and phloem were undeveloped and pint diameter increased.

(34) GA 3 application had the same effect on Hevea brasiliensis phloem as that on Melia azedarach.

(35) The root primordium of Pinus bungeana belongs to induced primordium, which is formed from the cross region of vascular cambium, phloem tissues and pith rays.

(36) Phloem elements and adjacent tissues are the principal feeding sites for most aphids.

(37) The rest of phloem also produced callus through dedifferentiation. In addition, there was callus from xylem.

(38) The aim of this research is to extract and utilize secretion of phloem of Tilia mongolica that use them to increase the zoophobous ability and phylactic power of non-resistant tree species.

(39) Primary vectors for transmitting phytoplasma are insects feeding on the sap of phloem, such as leafhopper, and psylla.

(40) The yellow-green fluorescence appeared in the large phloem parenchymatous cells when the section of life material was observed by fluorescent microscope with blue light.

(41) But boron also exhibits rapid and significant phloem mobility in species for which sorbitol, mannitol, or dulcitol are the primary photosynthates since these polyols can effectively complex boron.

(42) Some segments of hypha, swelled hypha, pelotons and conidiophore were in colonies in cork and secondary phloem.

(43) Cortex (pl. cortices or cortexes) A primary tissue in roots and stems of vascular plants derived from the corpus meristem, that extends inwards from the epidermis to the phloem.