Płachno Bartosz J, Świątek Piotr, Stpiczyńska Małgorzata, Miranda Vitor Fernandes Oliveira
Department of Plant Cytology and Embryology, Jagiellonian University in Kraków, 9 Gronostajowa Str, 30-387, Kraków, Poland.
Department of Animal Histology and Embryology, University of Silesia in Katowice, 9 Bankowa Str, 40-007, Katowice, Poland.
Protoplasma. 2018 Jul;255(4):1139-1146. doi: 10.1007/s00709-018-1220-6. Epub 2018 Feb 14.
In the genus Genlisea as well as in its sister genus Utricularia, the palate probably plays a key role in providing the colour, mechanical and olfactory stimuli to attract insect pollinators and to guide them to the generative structures and the nectary spur. However, information about the micro-morphology of the palate of Genlisea is scarce. This study aims to examine the structure of the palate in Genlisea hispidula in detail as well as the palate from other five species from the subgenus Genlisea. In particular, its aim is to ascertain whether these palates function as an area for the osmophores in the flower or whether they produce nectar. We showed that the palate in all of the species that were examined was the glandular type and that it had capitate, glandular trichomes, which had a similar general architecture across the species that were examined. No nectar secretion was observed on the palates. The ultrastructure of the palate trichomes showed that the palate glandular trichomes most probably function as scent glands that produce an olfactory stimulus for flower pollinators.
在狸藻属及其姐妹属捕虫堇属中，唇瓣可能在提供颜色、机械和嗅觉刺激以吸引昆虫传粉者并引导它们前往生殖结构和蜜腺距方面发挥关键作用。然而，关于狸藻属唇瓣微观形态的信息却很稀少。本研究旨在详细研究鬃毛狸藻的唇瓣结构以及狸藻亚属其他五个物种的唇瓣结构。特别是，其目的是确定这些唇瓣是否作为花中分泌挥发油的部位发挥作用，或者它们是否产生花蜜。我们发现，在所检查的所有物种中，唇瓣均为腺质型，并且具有头状腺毛，在所检查的物种中其总体结构相似。在唇瓣上未观察到花蜜分泌。唇瓣腺毛的超微结构表明，唇瓣腺毛极有可能起到气味腺的作用，为花朵传粉者产生嗅觉刺激。
