THE POSSIBLE ROLE OF AMMONIA IN PHOTOTAXIS OF MIGRATING SLUGS OF DICTYOSTELIUM-DISCOIDEUM
THE POSSIBLE ROLE OF AMMONIA IN PHOTOTAXIS OF MIGRATING SLUGS OF DICTYOSTELIUM-DISCOIDEUM
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DOI：
10.1073/pnas.85.11.3885
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发表时间：
1988-06-01
影响因子：
11.1
通讯作者：
SUTHERS, HB
中科院分区：
文献类型：
--
作者：
BONNER, JT;CHIANG, A;SUTHERS, HB
先前我们表明，细胞黏菌的细胞团上升的方向远离高浓度的氨气，可能是通过加速一侧的细胞。在这里，我们表明，以同样的方式NH3也可以参与在Dictyosteelium discoideum的迁移蛞蝓中发现的高度敏感的趋光性。我们有证据表明，光增加了它们的迁移速度和NH3的产生。由于单侧光通过“透镜效应”集中在细胞团的远端侧，这导致了明显的假设，即光刺激NH3的局部产生，NH3反过来刺激被照射区域中的细胞更快地移动。
Previously we showed that the rising cell masses of cellular slime molds orient away from high concentrations of ammonia gas, presumably by speeding up the cells on one side. Here we show that in the same way NH3 could also be involved in the highly sensitive phototaxis found in the migrating slugs of Dictyostelium discoideum. We have evidence that light increases their speed of migration and their production of NH3. Since unilateral light is concentrated on the distal side of a cell mass by the "lens effect," this leads to the obvious hypothesis that the light stimulates the local production of NH3, which, in turn, stimulates the cells in the illuminated region to move faster.