Lignification and lignin heterogeneity for various age classes of bamboo (Phyllostachys pubescens) stems.

The lignification process and lignin heterogeneity of fibre, vessel and parenchyma cell walls for various age classes of bamboo stems of Phyllostachys pubescens Mazel were investigated. It was shown that protoxylem vessels lignified in the early stage of vascular bundle differentiation, metaxylem vessel and fibre walls initiated lignification from the middle lamella and cell corners after the completion of vascular bundle differentiation. Most of the parenchyma cell walls lignified after the stem reached its full height, while a few parenchyma cells remained non-lignified even in the mature culm. The cell walls of fibres and most parenchyma cells thickened further during the stem growth to form polylamellate structure and the lignification process of these cells may last even up to 7 years. The fibre walls were rich in guaiacyl lignin in the early stage of lignification, and lignin rich in syringyl units were deposited in the later stage. Vessel walls mainly contained guaiacyl lignin, while both guaiacyl and syringyl lignin were present in the fibre and parenchyma cell walls.

[1]  何 蘭芳,et al.  Formation and structure of lignin in monocotyledons , 1990 .

[2]  B. Chabbert,et al.  Histochemistry of Lignin Deposition during Sclerenchyma Differentiation in Alfalfa Stems , 1996 .

[3]  Robert H. Marchessault,et al.  Chemical Composition Change of Bamboo. Accompanying its Growth , 1993 .

[4]  T. Itoh.  Lignification of Bamboo (Phyllostachys heterocycla Mitf.) During its Growth , 1990 .

[5]  R. Murphy,et al.  Fibre Maturation in the Bamboo Gigantochloa Scortechinii , 1997 .

[6]  N. Terashima,et al.  Formation and Structure of Lignin in Monocotyledons IV. Deposition Process and Structural Diversity of the Lignin in the CellWall of Sugarcane and Rice Plant Studied by Ultraviolet Microscopic Spectroscopy , 1991 .

[7]  T. Higuchi,et al.  Metabolism of p-coumaric acid during lignification of a bamboo , 1970 .

[8]  R. Murphy,et al.  Variation in Fibre and Parenchyma Wall Thickness in Culms of the Bamboo Sinobambusa Tootsik , 1988 .

[9]  T. Higuchi.  Biochemical Studies of Lignin Formation. III , 1957 .

[10]  Walter Liese,et al.  The Anatomy of Bamboo Culms , 2002 .

[11]  C. R. Metcalfe.  Anatomy of the monocotyledons , 1960 .

[12]  Walter Liese,et al.  Bamboos - Biology, silvics, properties, utilization , 1985 .

[13]  R. Murphy,et al.  Variation in Fibre Wall Structure in Bamboo , 1992 .

[14]  W. Liese,et al.  Research on bamboo , 1987, Wood Science and Technology.

[15]  R. Hartley,et al.  Detection of bound ferulic acid in cell walls of the Gramineae by ultraviolet fluorescence microscopy , 1976, Nature.

[16]  Nobuo Yoshizawa,et al.  Distribution of Guaiacyl and Syringyl Lignins in Normal and Compression Wood of Buxus Microphylla Var. Insularis Nakai , 1993 .