NDLI: Occurrence of osmiophilic particles is correlated to elongation growth of higher plants

Content Provider	Springer Nature Link
Author	Šamajová, O. Šamaj, J. Volkmann, D. Edelmann, H. G.
Copyright Year	1998
Abstract	The occurrence of elongation growth-related osmiophilic particles (OPs) was investigated in hypocotyls of sunflower, bean, and spruce as well as in pea epicotyls and in cress roots of intact seedlings. In all analyzed species, OPs were found to occur specifically within the periplasmic space between plasma membrane and the outer epidermal cell walls of elongating parts of hypocotyls, epicotyls, and roots, whereas cells of nonelongating parts were devoid of OPs. Auxin (IAA) markedly increased the number of OPs in epicotyl and hypocotyl segments. Treatment of pea epicotyl segments with the lectin concanavalin A inhibited their elongation growth in the presence of IAA. At a subcellular level this effect was characterized by the occurrence of a pronounced osmiophilic layer in the periplasmic space of the outer periclinal and the outer part of the anticlinal epidermal cell walls. Treatment of IAA-incubated segments with the secretion inhibitor brefeldin A inhibited both elongation growth and periplasmic occurrence of OPs. This effect was accompanied by complementary accumulation of OPs in the peripheral cytoplasm of epidermal cells. Together the results indicate that IAA-induced epidermis-specific secretion of OPs is closely related to cell elongation growth not only in organs of monocotyledonous species, but also in dicotyledonous angiosperms as well as in gymnosperms.
Starting Page	185
Ending Page	191
Page Count	7
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	202
Issue Number	3-4
e-ISSN	16156102
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bean Elongation growth Osmiophilic particles Pea Spruce Sunflower Cell Biology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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