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Janis Crandlemire-Sacco 《American journal of physical anthropology》1988,75(3):426-427
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C A Dragstedt 《Federation proceedings》1977,36(11):2509-2510
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Highly specializedpollination systems, such as figs and their wasp or orchidsthat deceive bees in trying to make them mate with their floralorgans, are intuitively appealing to most people and have, therefore,gained far more attention both in popular and scientific literaturethan the more generalized pollination systems. For a long timethe dominant view was that many, or perhaps even most, plantpollinatorinteractions were specialized. In 1996 Waser and his colleaguestried to stir things up by writing an article in which theyargued that, in contrast to common belief, generalization waswidespread in plantpollinator systems. Ten 相似文献
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Summary The distribution of immunoreactive neuropeptides was investigated in the retina of three species of skates (Raja clavata, R. radiata, R. oscellata), elasmobranch fish often used in electrophysiological work on the retina. Enkephalins, neuropeptide Y (NPY), substance P and glucagon were found in different types of amacrine cells.All four peptides appeared in cell bodies in the innermost part of the inner nuclear layer. Processes from the cells containing enkephalins were numerous and ramified throughout the inner plexiform layer. Processes from the cells containing glucagon were thick and rare, and were found throughout the inner plexiform layer, at times with a predominance in sublaminae 1 and 4. NPY-immunoreactive fibres appeared mainly in sublamina 1 but also in 2 or 3, and substance-P-immunoreactive fibres in sublaminae 1,4 and 5.Antisera against somatostatin, VIP or neurotensin did not show any immunoreactivity in the skate retina. 相似文献
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