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31. The xylem is a system confined to the transport of mineral elements.

32. The chemical components in different parts of Radix Fici Hirtae are similar but the contents of volatile component and psoralen are higher in the cortex than those in tile xylem.

33. Primary xylem Xylem derived from the procambium in the young plant.

34. Shixin 733 plants . The xylem cavitation and embolism were measured by monitoringemission ( AE ) from leaf xylem.

35. The extending cotyledon traces differentiate directly from the parenchymatous cells which locate on the outside of the poles of primary xylem.

36. This paper deals mainly with comparative studies on elements of secondary xylem in 39 species of Chinese Magnolia and Michelia.

37. The vascular bundle consists of vascular bundle sheath, xylem, phloem and big parenchymatous cells.

38. The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.

39. To find out the polygalic acid content in different parts of polygala, the stem-leave, root, tubular roots skin, broken roots skin, xylem and head of roots were detected by HPLC.

40. The volatile material increased in xylem after the PWN invaded. The blockage of water conduction caused by tracheid cavitation was very important factor causing the death of infected pine trees.

41. It is an important pathway for movement of these substances outside the xylem, for example across the root cortex. Compare symplast.

42. The characteristics of vessel elements of secondary xylem in shoots of staminate and pistillate plants o Fraxinus pennsylvanica were studied by isolation method and micrography.

43. Blade angle is strikingly correlated to xylem water potential at midday.

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

45. The vessel elements of secondary xylem in Averrhoa carambola are observed by bio-microscope image analysis system and micrography .

46. The stele includes all primary tissues derived from the procambium consists of pericycle(http://Sentencedict.com), phloem and xylem.

47. The vessel elements of secondary xylem in Ficus fistulosa were observed and studied by bio-microscope image analysis system and micrography .

48. The xylem sap of bottle gourd No. 3 as rootstock was the best one to promote grafting seedling of cucumber to grow significantly.

49. The secondary xylem of root is well developed, and there is supernumerary cambium around the vessels.

50. Both xylem and phloem form a continuous branched system in the whole plant body.

51. POD was mainly distributed in the radial walls of the cambial cells and expanding xylem cell, especially at the corner of cell wall and cell wall close to the primary pit field.

52. The process of vessel element's promotion, formation and connection in primary xylem of Antirrhinum majus, a model plant, was observed through micropolariscope and bright-field microscope.

53. Its xylem conduit develops, gas is rooted much, recovery capability is very strong.

54. Tracheids form the only xylem conducting tissue of vascular plants other than angiosperms, some Gnetales, and a few ferns such as bracken. Compare vessel.

55. The sporangium dehisces longitudinally. Centrarch xylem consists of G-type conducting tracheids bearing annular secondary thickenings, between which are irregular simple perforations.

56. The study of the stem's secondary xylem of Rhus chinensis Mill reveals that perforation plate is simple perforation plate.

57. The xylem parenchyma cell wall in roots of 2.47% salinity highly lignified and thickened, The secondary growth in high salinity was in advance and secondary structures developed.

58. A system confined to the transport of mineral elements is known as the xylem.

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

60. Centripetal xylem differentiates from the outside toward the center, and a centripetal inflorescence (e. g. the capitulum ) is one in which the outer flowers open before those in the center.