xylem造句
61. A view of outer stem shows the relative absence of lignified strengthening tissues, and inner shows thin-walled parenchyma tissue and vascular bundles with large xylem lacunae.
62. Plant cell walls can be strengthened for extra support by addition of lignin (as in xylem and sclerenchyma)or extra cellulose(as in collenchyma).
63. Secondary xylem consists of pitted vessels, parenchyma fibers and rays.
64. The harmful effect of injecting chemical into tree on the xylem, bast, periderm and tree body was studied.
65. In this paper, the transport characteristics of the nitrogenous com-pounds in the xylem sap of soybean plant were studied.
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