Lignified tissues include sclerenchyma and xylem .
木质素组织包括厚壁组织和木质部。
It consists principally of xylem and phloem ( water and food-conducting tissues respectively ) , and also contains strengthening tissue ( sclerenchyma ) and packing tissue ( parenchyma ) .
它主要包括木质部和韧皮部(分别运输水分和养料)，还含有机械组织(厚壁组织)和填充组织(薄壁组织)。
The later enlargement of bulliform cell occurs synchronously , and is limited by the presence of subepidermal sclerenchyma neighboring it . The enlargement of bulliform cells would play an importment role in expansion of the developing blade .
