Directed changes in the pattern of Balbiani ring puffing in Chironomus : effects of a sugar treatment
作者： Wolfgang Beermann
DOI: 10.1007/BF00344024
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摘要: The Balbiani ring situation in larval salivary gland nuclei of Chironomus tentans and C. pallidivittatus has been reinvestigated. Descriptive as well experimental data reveal an interesting regulatory relationship between BR1, BR2, both chromosome 4, BR6, exceptional 3: In species the repression (or non-induction) BR2 is correlated with induction vice versa. nature, always fully expanded while BR1 appears repressed or absent. Animals raised laboratory show expanded, but typically BR2>BR1. Puffing at site BR6 sporadically observed animals BR1>BR2. Treatment larvae solutions various sugars, e.g. 0.5–2.0% galactose for several days leads to a drastic inversion BR1/BR2 all parts such that may be completely expanded. our stock same treatment invariably eventual full expansion BR6. time sequence these changes recorded. Prepupae seem refractory treatment. A rapid reversion typical BR condition takes place when are transferred back standard food. Other rings, BR3 BR4, other puffs, do not react specifically sugar
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sci-hub.se 参考文章(19)
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