COMMITMENT TO AUTOGAMY IN PARAMECIUM BLOCKS MATING REACTIVITY - IMPLICATIONS FOR REGULATION OF THE SEXUAL PATHWAY AND THE BREEDING SYSTEM
COMMITMENT TO AUTOGAMY IN PARAMECIUM BLOCKS MATING REACTIVITY - IMPLICATIONS FOR REGULATION OF THE SEXUAL PATHWAY AND THE BREEDING SYSTEM
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DOI：
10.1016/0014-4827(90)90126-u
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发表时间：
1990-03-01
影响因子：
3.7
通讯作者：
RAHEMTULLAH, S
中科院分区：
文献类型：
--
作者：
BERGER, JD;RAHEMTULLAH, S
对自花受精的承诺阻止了草履虫的交配反应。先前产生交配反应性的细胞在自配前裂变前30-90分钟失去反应性。当细胞自然耗尽食物供应时，交配反应会在标准饥饿水平下发生。在突然饥饿的培养物中，交配反应在降档后 3.3 小时出现。自花受精也是由饥饿引发的。随着细胞年龄的增长，自体受精开始所需的饥饿水平逐渐降低。当自体受精饥饿阈值下降到如此低的水平，以至于所有细胞在任何细胞产生交配反应性之前就开始自体受精，那么在自然饥饿条件下就不会发生反应性，并且接合的成熟期已经结束。自体受精没有绝对的不成熟期。
Commitment to autogamy blocks mating reactivity in Paramecium. Cells which had previously developed mating reactivity, lost reactivity 30-90 min prior to the preautogamous fission. Mating reactivity develops at a standard level of starvation when cells are allowed to exhaust their food supply naturally. In abruptly starved cultures, mating reactivity appears 3.3 h after downshift. Autogamy is also triggered by starvation. The level of starvation required for initiation of autogamy decreases progressively as cells age. When the autogamy starvation threshold drops to such a low level that all cells become committed to autogamy before any of them develop mating reactivity, reactivity does not occur under natural starvation conditions and the period of maturity for conjugation has come to an end. There is no absolute immature period for autogamy.