Vesprini J L, Nepi M, Ciampolini F, Pacini E
CONICET, Facultad de Ciencias Agrarias, UNR, Zavalla, Argentina.
Plant Biol (Stuttg). 2008 Mar;10(2):268-71. doi: 10.1111/j.1438-8677.2007.00023.x.
We used electron microscopy to investigate the fine structure of nectary secretions of Helleborus foetidus. During the secretion period, epidermal cells of nectaries discharge the whole contents of the cytoplasm into the nectary cavity. The external wall of the cell breaks, releasing the cytoplasm as a dense aggregate that later disperses in the nectary cavity. Cell components, such as chromatin, plastids, mitochondria, lipid droplets and membranes, were found in the nectar of H. foetidus, evincing the complex nature of the secreted material. These results confirm that nectar secretion in H. foetidus is of the holocrine type.
我们利用电子显微镜研究了臭嚏根草蜜腺分泌物的精细结构。在分泌期，蜜腺的表皮细胞将细胞质的全部内容物排放到蜜腺腔内。细胞外壁破裂，细胞质以致密聚集体的形式释放出来，随后在蜜腺腔内分散。在臭嚏根草的花蜜中发现了诸如染色质、质体、线粒体、脂滴和膜等细胞成分，这表明分泌物质具有复杂的性质。这些结果证实，臭嚏根草的花蜜分泌属于全泌型。
