| 41. | This consisted of a cylindrical strand of xylem, surrounded by a region of phloem.
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| 42. | With bacterial vascular diseases, the infection is spread within the plants through the xylem.
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| 43. | Wood is primarily composed of xylem cells with cell walls made of cellulose and lignin.
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| 44. | Secondary xylem is commercially important as wood.
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| 45. | But certain cells don't transform into xylem and phloem and remain as such.
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| 46. | It moves towards the vertically aligned xylem.
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| 47. | Xylem comprises three business units-Water Solutions, Analytics, and Applied Water Systems.
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| 48. | Some xylem cells carry water and nutrients up from the roots, while others store food.
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| 49. | Without proof that sizable negative pressures exist in the xylem, the pull theory remains speculative.
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| 50. | It also allows plants to draw water from the root through the xylem to the leaf.
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