Bennett M R, Lavidis N A
Department of Physiology, University of Sydney, Australia.
Neurosci Lett. 1991 Dec 16;134(1):79-82. doi: 10.1016/0304-3940(91)90513-s.
The number of quanta secreted from release sites along visualized terminal branches at toad (Bufo marinus) neuromuscular junctions during different seasons was determined. Terminal branches were visualized by prior staining with the fluorescent dye, 3,3'-diethyloxadicarbocyanine iodide (DiOC2(5)). The average number of quanta secreted by release sites and recorded with an extracellular electrode was determined at different positions along terminal branches in winter and summer. There was a decrease in me at different positions along terminal branches in winter compared with me at similar positions in summer during each of 3 years. The observations show that the capacity of release sites to secrete quanta is modulated by seasonal changes.
测定了不同季节蟾蜍（海蟾蜍）神经肌肉接头处沿可见终末分支的释放位点分泌的量子数。通过事先用荧光染料3,3'-二乙基氧杂二羰花青碘化物（DiOC2(5)）染色来观察终末分支。在冬季和夏季，沿着终末分支的不同位置，用细胞外电极测定释放位点分泌并记录的量子平均数。在3年中的每一年，与夏季相似位置相比，冬季终末分支不同位置的量子数均有所减少。这些观察结果表明，释放位点分泌量子的能力受季节变化的调节。
