CAJ | 학술논문

采用透射电子显微镜(TEM)、扫描电子显微镜-X射线能谱仪(SEM-EDXA)及共聚焦激光扫描显微镜(CISM)研究了柠条(Caragana korshinskii)正常木与受拉木纤维细胞的超微结构及木质素在细胞壁中的分布.结果表明,柠条正常木纤维细胞壁分为胞间层(ML)、初生壁(P)、次生壁外层(S_1)、次生壁中层(S_2)、次生壁内层(S_3);而受拉木与正常木不同,其细胞S_3层被凝胶层(G层)取代.正常木与受拉木中导管和木射线细胞壁的木质素浓度均比纤维细胞壁的高.正常木纤维细胞各形态区的木质素浓度不同,细胞角隅区的木质素浓度最高,其次是复合胞间层(CML),S_2层最低.柠条受拉木纤维细胞壁中除G层未木质化外,与正常木细胞壁各层木质索分布相似.
채용투사전자현미경(TEM)、소묘전자현미경-X사선능보의(SEM-EDXA)급공취초격광소묘현미경(CISM)연구료저조(Caragana korshinskii)정상목여수랍목섬유세포적초미결구급목질소재세포벽중적분포.결과표명,저조정상목섬유세포벽분위포간층(ML)、초생벽(P)、차생벽외층(S_1)、차생벽중층(S_2)、차생벽내층(S_3);이수랍목여정상목불동,기세포S_3층피응효층(G층)취대.정상목여수랍목중도관화목사선세포벽적목질소농도균비섬유세포벽적고.정상목섬유세포각형태구적목질소농도불동,세포각우구적목질소농도최고,기차시복합포간층(CML),S_2층최저.저조수랍목섬유세포벽중제G층미목질화외,여정상목세포벽각층목질색분포상사.
Ultrastructure and lignin distribution in fiber cell walls of Caragana korshinskii normal wood and tension wood were studied by using TEM, SEM-EDXA and CLSM. The results showed that fiber cell wall in normal wood consists of middle lamella ( ML), the primary wall (P) , the outer (S_1 ) , the middle ( S_2 ) and the inner layers ( S_3) of secondary wall. However, the Gelatinous (G) layer is replaced the S3 layer in tension wood. Both normal wood and tension wood has higher lignin concentration in vessels and rays than in fibers. In normal wood, lignin concentration is the highest in cell corner midlle lamella ( CCML) , followed by in compound middle lamella (CML), and is the lowest in S2 layer. Lignin distribution in tension wood is similar to that in normal wood, except for the non-lignified G layer.