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New observations on a rare endobiotic green alga, Stomatochroon lagerheimii, from a tropical area in China

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Stomatochroon lagerheimii is a rare endobiotic green alga that lives in the stomatal chambers of the leaves from tropical vascular plants. The only report, to date, on this species was from Sumatra, Indonesia, by Palm in 1934. For this study, specimens were collected from a tropical rain forest in Yunan, south west China, and each section of the thallus was measured using these Chinese specimens since the dimensions for each part were not given in Palm's original description. Using LM and SEM, this study has discovered further important characteristics about S. lagerheimii. Notably, that the external part of S. lagerheimii can be deep orange - red as well as deep purple, the sporangia wall is reticulate and the setae are the first structures to arise from the basal cell of a germling. The host plants, originally from Indonesia and China, are from the genus, Clerodendrum (Verbenaceae), which suggests that this alga is an endobiotic parasitic species that exhibits host specificity.
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Document Type: Research Article

Publication date: November 1, 2013

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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