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Pollen Morphology and Ultrastructure of Selected Zingiberaceae and Costaceae Species

Pollenmorphologie und Ultrastruktur, ausgewählter Zingiberaceae und Costaceae Arten
Authors: Dirr, Lukas;

Pollen Morphology and Ultrastructure of Selected Zingiberaceae and Costaceae Species

Abstract

Zingiberaceae und Costaceae gehören zur Ordnung der Zingiberales (Ingwerartige) und sind unter anderem als Zier-, Arznei- oder Gewürzpflanzen bekannt. Aus palynologischer Sicht sind diese Familien wenig erforscht. Die Pollenwand ist im Vergleich zu der, vieler anderer Angiospermen sehr ungewöhnlich strukturiert. Es konnte gezeigt werden, dass die Pollenwand der inaperturaten Zingiberaceae aus einem 3-schichtigen Intine-Komplex besteht. Nach außen hin schließt ein dünner „surface layer“ an. Die Ornamentierung ist psilat bis echinat. Im Gegensatz zu herkömmlichen Pollenwänden bestehen die Skulptur-Elemente aus Polysacchariden, und nicht aus widerstandsfähigem Sporopollenin. Dieses Merkmal grenzt die Zingiberaceae klar von den anderen Familien der Zingiberales ab. Um diese komplexe Struktur der Pollenwand aufzuklären, wurden mit unterschiedlichsten licht- und elektronenmikroskopischen Methoden, sechs Zingiberaceae- sowie drei Costaceae-Arten untersucht. Trotz naher Verwandtschaft unterscheiden sich die Pollenwände der Costaceae deutlich von denen der Zingiberaceae. Costaceae besitzen ein acetolyseresistentes Sporoderm, bestehend aus einer massiven sporopollenin-haltigen Exine und einer einschichtigen Intine. Im Gegensatz zu den inaperturaten Zingiberaceae haben Costaceae Aperturen.

About structure and sculpture of Zingiberaceae and Costaceae pollen few information is available. In the present study six species of Zingiberaceae and three species of Costaceae were investigated. Various light microscopic (LM), scanning-(SEM) and transmission electron microscopic (TEM) techniques were applied to elucidate pollen wall stratification. Zingiberaceae pollen is inaperturate and exine-less. The wall structure consists of a three layered intine and a polysaccharide surface layer. Ornamentation elements are echini, and not resistant to acetolysis, which indicates polysaccharides. Compared to Zingiberaceae, Costaceae pollen is aperturate and psilate. The wall comprises a sporopollenin exine (tectum, infratectum) and a mono-layered intine. The pollen wall structure of other Zingiberales, like Strelitziaceae, Heliconiaceae or Cannaceae, are well comparable to Zingiberaceae. The common feature is a thick, channeled ektintine, whereas the presence of an exine is the major difference.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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