Pakhnevich Alexey, Nikolayev Dmitry, Lychagina Tatiana
Borissiak Paleontological Institute of RAS, Profsoyuznaya st., 123, Moscow 117997, Russia; Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia.
Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia.
J Struct Biol. 2024 Dec;216(4):108126. doi: 10.1016/j.jsb.2024.108126. Epub 2024 Sep 6.
The global crystallographic texture of calcite and aragonite in the shells of the bivalves Bathymodiolus thermophilus, Mytilus galloprovincialis, M. edulis and M. trossulus was studied by means of neutron diffraction. It was revealed that the general appearance of pole figures isolines of both minerals coincides for the studied species. The crystallographic texture sharpness evaluated by means of pole density on the calcite pole figures ((0006), (101¯4)) and aragonite pole figures ((012)/(121), (040)/(221)) coincides or has close values for deep-sea hydrothermal species B. thermophilus and the studied shallow-water species of the genus Mytilus. The calcite pole figures (0006) and (101¯4) of B. thermophilus show a shift in the position of texture maximum values compared to corresponding pole figures of other mussels. The shell microstructure of all studied mollusks is similar, only the shape of the fibers of B. thermophilus differs. Global crystallographic texture is a stable feature of the family Mytilidae. The extreme habitat conditions of the hydrothermal biotope do not significantly affect the crystallographic texture of B. thermophilus.
利用中子衍射研究了嗜热深海贻贝、地中海贻贝、紫贻贝和翡翠贻贝贝壳中方解石和文石的整体晶体织构。结果表明，所研究物种的两种矿物的极图等值线的总体外观是一致的。通过方解石极图（(0006)，(101¯4)）和文石极图（(012)/(121)，(040)/(221)）上的极密度评估的晶体织构锐度，对于深海热液物种嗜热深海贻贝和所研究的贻贝属浅水物种而言是一致的或具有相近的值。与其他贻贝的相应极图相比,嗜热深海贻贝的方解石极图(0006)和(101¯4)显示出织构最大值位置的偏移。所有研究的软体动物的贝壳微观结构相似，只是嗜热深海贻贝的纤维形状不同。整体晶体织构是贻贝科的一个稳定特征。热液生物群落的极端生境条件对嗜热深海贻贝的晶体织构没有显著影响。
