Homoplastic occurrence of perforated pit membranes and torus-bearing pit membranes in ancestral angiosperms as observed by field-emission scanning electron microscopy
Homoplastic occurrence of perforated pit membranes and torus-bearing pit membranes in ancestral angiosperms as observed by field-emission scanning electron microscopy
复制标题
场发射扫描电子显微镜观察祖先被子植物穿孔纹孔膜和圆环纹孔膜的同质性发生
DOI：
10.1007/s10086-012-1304-4
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
Nakada R.
中科院分区：
文献类型：
--
作者：
Sano Y.;Utsumi Y.;Nakada R.
最近的研究表明，穿孔坑膜（即在其中心部分有一个大开口的坑膜）通常存在于核心木纤维之间。目前尚不清楚这种坑膜是否也可能出现在被子植物祖先中。因此，利用场发射扫描电镜对7个科9个物种的纤维间坑膜结构进行了研究，这些物种位于比核心目更古老的位置。我们在九个物种中的三个物种中发现了穿孔的坑膜。我们的观察表明，即使在被子植物的祖先群中，穿孔的坑膜也是相对常见的。在其他六种的非穿孔坑膜中，我们发现了一系列的结构变化。6种植物中有3种都有薄壁的坑膜，没有明显的细胞间层，而且3种植物的片状坑膜孔隙率不同。与薄壁坑膜不同，小叶叶杨的纤维间坑膜。粳稻细胞壁厚，胞间层明显，五味子胞间膜呈环状。这种坑膜层状结构的变化和环面坑膜的同塑性尚未在祖先被子植物中报道。我们的观察表明，纤维间坑膜的结构可能比以前的研究表明的更复杂。
Recent studies demonstrated that perforated pit membranes (i.e., pit membranes with a large opening in their central portion) are commonly present between wood fibers in core eudicots. It is unclear whether this type of pit membranes might also occur in ancestral angiosperms. Therefore, structure of interfiber pit membranes was examined by field-emission scanning electron microscopy in nine species representing seven families that are located at more ancestral position than core eudicots. We found perforated pit membranes in three of the nine species. Our observations indicate that perforated pit membranes are relatively common even in ancestral groups of angiosperms. In the non-perforated pit membranes of the other six species, we found a range of structural variations. Thin-walled pit membranes without apparent intercellular layers were always found in three of the six species and the porosity of sheet-like pit membranes differed among the three species. Unlike the thin-walled pit membranes, interfiber pit membranes ofBuxus microphyllavar.japonicawere thick-walled with obvious intercellular layers, and inSchisandra chinensis, we often observed torus-bearing pit membranes. Such variations in layered structure of pit membranes and homoplastic occurrence of torus-bearing pit membranes have not yet been reported for ancestral angiosperms. Our observations indicate that the structure of interfiber pit membranes might be more complicated than previous studies might suggest.
登录
查看更多内容
木材微观形态：扫描电子显微照片图集
DOI：
--
发表时间：
2000
期刊：
--
影响因子：
--
作者：
大谷 諄
通讯作者：
大谷 諄
五味子科的木材和树皮解剖：对系统发育、习性和导管进化的影响
DOI：
10.5642/aliso.19991801.14
发表时间：
1999
期刊：
Aliso
影响因子：
--
作者：
T. Feild;D. Chatelet;L. Balun;E. Schilling;R. Evans
通讯作者：
R. Evans
影响因子：
1.9
作者：
Dute, Roland R.;Elder, Thomas
通讯作者：
Elder, Thomas
水曲柳纹孔膜的结构变异和次生变化。
DOI：
--
发表时间：
1994
期刊：
影响因子：
--
作者：
Y. Sano;K. Fukuzawa
通讯作者：
K. Fukuzawa
青云杉幼树人工倾斜压缩木细胞形成与结构的研究：二．
DOI：
--
发表时间：
1982
期刊：
Journal of the Faculty of Agriculture
影响因子：
--
作者：
Masahide Yumoto;S. Ishida;K. Fukazawa
通讯作者：
K. Fukazawa