OSMOREGULATION AND SALINITY TOLERANCE IN 2 SPECIES OF BIVALVE MOLLUSK - LIMNOPERNA-FORTUNEI AND MYTILOPSIS-LEUCOPHAETA
OSMOREGULATION AND SALINITY TOLERANCE IN 2 SPECIES OF BIVALVE MOLLUSK - LIMNOPERNA-FORTUNEI AND MYTILOPSIS-LEUCOPHAETA
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DOI：
10.1016/0022-0981(89)90158-5
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发表时间：
1989-01-01
影响因子：
2
通讯作者：
GREENBERG, MJ
中科院分区：
文献类型：
--
作者：
DEATON, LE;DERBY, JGS;GREENBERG, MJ
本文报道了两种双壳类软体动物：异齿亚纲（Heterodonta subclass）的寡盐性软体动物白壳贻贝（Mytilopsis leucophaeta Conrad）和翼形亚纲（Pteriomorphae subclass）的淡水软体动物淡水池蚌（Limnoperna fortunei Dunker）的耐盐性和渗透调节。贻贝属耐受的渗透压范围为5-400 mOsm。淡水蛤存活于去离子水和渗透压≤ 0.0001的环境中。400 mOsm。在浓度> 70 mOsm的介质中，两种物质均为渗透压和离子构象异构体;在较低的环境渗透压下，两种物质均为高渗调节剂。血淋巴中的主要离子是Na+和Cl-;驯化稀释培养基导致两个物种的高钙血症。贻贝属软组织的氨基酸含量为182 μ mol·cm-1。g-1干重，适应10 mOsm的动物。氨基酸的组织水平增加到405 μ mol·cm-1。g ~（-1）在400 mOsm下驯化。池蚌外套膜组织的游离氨基酸含量为9.6 μ mol·cm-1。g-1干重，并增加至35 μ mol·cm-1。g-1，适应200 mOsm的动物。尽管两个物种之间的亲缘关系很远，但它们之间的神经调节行为的差异似乎是定量的而不是定性的。
This paper reports on salinity tolerance and osmotic regulation in two bivalve molluscs: Mytilopsis leucophaeta Conrad, an oligohaline species (subclass Heterodonta), and Limnoperna fortunei Dunker, a freshwater species (subclass Pteriomorphia). The range of osmolality tolerated by Mytilopsis is 5-400 mOsm. Limnoperna survives in deionized water and in osmolalities of .ltoreq. 400 mOsm. Both species are osmotic and ionic conformers in media with concentrations of > 70 mOsm; at lower ambient osmolalities, both are hyperosmotic regulators. The major hemolymph ions are Na+ and Cl-; acclimation to dilute media results in hypercalemia in both species. The amino acid content of Mytilopsis soft tissues is 182 .mu.mol .cntdot. g-1 dry wt in animals acclimated to 10 mOsm. The tissue levels of amino acids increase to 405 .mu.mol .cntdot. g-1 in Mytilopsis acclimated to 400 mOsm. The free amino acid content of Limnoperna mantle tissue is 9.6 .mu.mol .cntdot. g-1 dry wt in animals acclimated to 10 mOsm and increases to 35 .mu.mol .cntdot. g-1 in animals acclimated to 200 mOsm. The differences in osmoregulatory behavior between the two species appear to be quantitative rather than qualitative, despite the phyletic distance between them.