NDLI: Studies on floral nectary, tepals’ structure, and gynostemium morphology of Epipactis palustris (L.) Crantz (Orchidaceae)

Content Provider	Springer Nature Link
Author	Kowalkowska, Agnieszka K. Kostelecka, Joanna Bohdawicz, Jerzy Kapusta, Małgorzata Rojek, Joanna
Copyright Year	2014
Abstract	The lip of Epipactis palustris consists of two movably joined parts: the basal part (hypochile) with central broad isthmus and epichile with callus. The analysis of flowers provides strong evidence to conclude that the whole surface of lip callus and abaxial side of isthmus are secretory. The exudation at first appears on callus, at early stages, later on isthmus. It could be a strategy to prolong the emission of volatile substances and nectar, and this means to prolong luring pollinators. The results from transmission electron microscopy (TEM) support this conclusion. The plastids noted in callus were without starch, whereas the isthmus’ cells contained partly hydrolyzed starch. Some plastids, noted in callus, had polymorphic shapes, which were often related to a starch reduction. During the depletion of starch in callus cells, the number of plastoglobuli within the plastids increased, and also lipid bodies appeared in the cytoplasm whereas, in isthmus cells, proplastids with phytoferritin were noted. The endoplasmic reticulum was in contact with plasmalemma, and the vesicles were fusing with plasmalemma in secretory cells of callus and isthmus, which is a way of granulocrine secretion. The cross-sections of sepals revealed that abaxial epidermis was tomentose, with stomata at the top of substomatal cavities. The pollen grains adhering to the rostellum-viscidium prove previous ecological observations that the rostellum-viscidium is not a barrier preventing self-pollination.
Starting Page	321
Ending Page	333
Page Count	13
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	252
Issue Number	1
e-ISSN	16156102
Language	English
Publisher	Springer Vienna
Publisher Date	2014-07-29
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Epipactis palustris Floral nectar Self-pollination SEM TEM Orchidaceae Cell Biology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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Studies on floral nectary, tepals’ structure, and gynostemium morphology of Epipactis palustris (L.) Crantz (Orchidaceae)

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