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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Haemocyte response associated with induction of shell regeneration in the deep-sea vent mussel Bathymodiolus azoricus (Bivalvia: Mytilidae)
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Haemocyte response associated with induction of shell regeneration in the deep-sea vent mussel Bathymodiolus azoricus (Bivalvia: Mytilidae)

机译：与深海通风口贻贝拟南芥（Bivalvia：Mytilidae）的壳再生诱导相关的血细胞反应

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摘要

This study reports on the haemocyte responses after induction of shell regeneration in the hydrothermal mussel Bathymodiolus azoricus. Haemolymph was drawn from live mussels collected at Menez Gwen hydrothermal vent site (850 m depth) at the Mid Atlantic Ridge (MAR) and was compared with those collected following laboratory acclimatisation (1 atm and Ca-rich algal diet) and also with induced specimen for up to 30 days. Simultaneously, histological changes in mantle micro-morphology with the histochemical detection of Ca mobilisation in tissues were conducted. On the basis of light- and transmission electron microscopy, it is concluded that the physiological equipment involved in shell regeneration in the deep sea bivalve closely resembles that in littoral mytilids, a group that B. azoricus is closely related. This in spite of previously alleged molecular and cellular adaptations to extreme conditions typical at deep sea hydrothermal vents. Three types of blood cells were identified sharing various morphological similarities with those in many non-vent bivalves. Significant increase in the number of circulating haemocytes was detected from day 5 after induction shell regeneration. It is suggested that the increase may be a result of migration of haemocytes from the connective tissue, probably to the shell growth frontline. It is alleged that a first peak in haemocyte number is a non-specific immune response related wound healing, which renders changes in the pallial fluid that are favourable for CaCO_3 deposition. The conspicuous presence of an unidentified, acid soluble, highly refractive structure in the haemolymph of induced mussels was detected, which may play a role in Ca nucleation. This study has set the stage for investigations underway on the influence of hydrostatic pressure on shell biomineralisation in B. azoricus subjected to post-capture hyperbaric simulations.
机译：该研究报道了在热液贻贝百里香中的壳再生诱导后的血细胞反应。血淋巴取材于大西洋中脊（MAR）的Menez Gwen热液喷口部位（深度850 m）收集的活贻贝，并与实验室适应化处理后采集的活贻贝（1 atm和富含Ca的藻类饮食）以及诱导样本进行了比较。长达30天。同时，通过组织化学检测组织中钙的迁移，进行了地幔微观形态的组织学变化。根据光电子显微镜和透射电子显微镜，可以得出结论，深海双壳类动物壳再生所涉及的生理设备与滨海类甲虫密切相关，而偶氮芽孢杆菌则与之密切相关。尽管先前据称分子和细胞适应了深海热液喷口的典型极端条件。鉴定出三种类型的血细胞与许多非通风的双壳类动物具有相同的形态相似性。从诱导壳再生后第5天开始，检测到循环血细胞的数量显着增加。有人认为，这种增加可能是由于血细胞从结缔组织迁移到外壳生长前沿的结果。据称，血细胞数的第一个峰值是与伤口愈合有关的非特异性免疫反应，这导致了有助于CaCO_3沉积的眼睑液的变化。在诱导出的贻贝的血淋巴中明显存在未鉴定的，酸可溶的高折射结构，这可能在钙成核中起作用。这项研究为流体静压对捕集后高压模拟下的偶氮芽孢杆菌壳生物矿化的影响的研究奠定了基础。

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