ATOMIC FORCE MICROSCOPY OF TORUS-BEARING PIT MEMBRANES
ATOMIC FORCE MICROSCOPY OF TORUS-BEARING PIT MEMBRANES
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DOI：
10.1163/22941932-90000068
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发表时间：
2011-01-01
期刊：
影响因子：
1.9
通讯作者：
Elder, Thomas
中科院分区：
文献类型：
--
作者：
Dute, Roland R.;Elder, Thomas
利用原子力显微镜对4种木本植物、3种被子植物和1种裸子植物的纹孔膜进行了比较研究。桂花的花托是二分的，由一个脓疱区覆盖在平行的微纤维上，形成一个外围的冠。冠状微纤维在穿过边缘时形成放射状辐条。边缘微纤维是松散的，从而促进水分子的通过。用酸化的硫酸钠除去脓疱层。Cercocarpus montanus的Tori也有脓疱表面，但没有冠。火炬松的花托具有细颗粒至无定形花托基质。翅榆（Ulmus阿拉塔tori）具有横贯表面的微纤丝。原子力显微镜证明了自己是一个有用的工具，高分辨率的研究坑膜，只有最少的标本制备。
Atomic force microscopy was used to compare the structures of dried, torus-bearing pit membranes from four woody species, three angiosperms and one gymnosperm. Tori of Osmanthus armatus are bipartite consisting of a pustular zone overlying parallel sets of microfibrils that form a peripheral corona. Microfibrils of the corona form radial spokes as they traverse the margo. Margo microfibrils are loosely packed thus facilitating passage of water molecules. The pustular layer is removed by acidified sodium chlorite. Tori of Cercocarpus montanus also have a pustular surface, but lack a corona. Tori of Pinus taeda have a finely granular to amorphous torus matrix. Ulmus alata tori have microfibrils traversing the surface. The atomic force microscope proves itself a useful tool for high resolution study of pit membranes with only minimal specimen preparation.