Maier C E, Singer M
J Exp Zool. 1981 Jun;216(3):395-7. doi: 10.1002/jez.1402160307.
Four groups of bilaterally amputated newts were exposed to (1) continuous light, LL; (2) continuous light with daily prolactin injections, LL-PRL; (3) total darkness, DD; or (4) total darkness with daily prolactin injections, DD-PRL. The results confirmed that LL animals regenerate their limbs more rapidly than DD. The results also showed that LL-PRL animals do not respond to the exogenous prolactin but that DD-PRL animals do respond and in fact regenerate at a rate which exceeds not only DD but also LL and LL-PRL. The possible synergism between prolactin and photoperiod is discussed.
(1) 持续光照，LL；(2) 持续光照并每日注射催乳素，LL-PRL；(3) 完全黑暗，DD；或(4) 完全黑暗并每日注射催乳素，DD-PRL。结果证实，处于持续光照环境中的动物肢体再生速度比处于完全黑暗环境中的动物更快。结果还表明，处于持续光照并注射催乳素环境中的动物对外源催乳素无反应，但处于完全黑暗并注射催乳素环境中的动物有反应，且其再生速度不仅超过处于完全黑暗环境中的动物，还超过处于持续光照环境中的动物以及处于持续光照并注射催乳素环境中的动物。文中讨论了催乳素与光周期之间可能存在的协同作用。
