Podostemaceae

Cook, Christopher D.K.; Rutishauser, Rolf

doi:10.1007/978-3-540-32219-1_40

Cited by 36 publications

(77 citation statements)

References 95 publications

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“…These plants grow in rapidly flowing water, attached to rocks or other solid substrate. Species occur in the tropics with a few species reaching temperate regions (Cook & Rutishauser 2007). The family is divided into three subfamilies (Engler 1930;Kita & Kato 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Plants are characterized by the lack of aerenchyma (otherwise common in aquatic plants), lack of stomata, lack of an endodermis and pericycle, inconspicuous vascular tissue, faint distinction between xylem and phloem, abundant starch grains, presence of laticiferous and/or secretory channels and presence of silica bodies (e.g. Schnell 1967, Cusset & Cusset 1988, Cook & Rutishauser 2007. Although the presence of silica bodies in Podostemaceae has been noted by numerous authors in many genera, such as Apinagia, Diamantina, Podostemum and Weddellina (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Silica bodies and their systematic implications at the subfamily level in Podostemaceae

et al. 2011

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Podostemaceae is a family of eudicotyledonous rheophytes with unique morphology, sometimes resembling algae, lichens or bryophytes. This study evaluates the taxonomic value of silica-body morphology (presence, location, size, shape, ornamentation) in species representing the three subfamilies: Tristicha trifaria (Bory ex Willd.) Spreng. (Tristichoideae), Weddellina squamulosa Tul. (Weddellinoideae) and Diamantina lombardii Novelo, C.T.Philbrick & Irgang (Podostemoideae). T. trifaria and D. lombardii have silica bodies in stems and leaves. In contrast, W. squamulosa exhibits silica bodies only in the scale-like leaves. The morphology of these bodies is unique to each species. The results denote the taxonomic usefulness of silica characteristics and a need for a more complete study of silica bodies throughout the family. Key words: aquatic plants, Podostemaceae, silica bodies. ResumoPodostemaceae é uma família eudicotiledônea reófita de morfologia peculiar, lembrando por vezes algas, liquens ou briófitas. O presente estudo avalia o valor taxonômico da morfologia dos corpos silicosos (presença, localização, tamanho, forma e ornamentação) em espécies representantes das três subfamílias: Tristicha trifaria (Bory ex Willd.) Spreng. (Tristichoideae), Weddellina squamulosa Tul. (Weddellinoideae) e Diamantina lombardii Novelo, C.T.Philbrick & Irgang (Podostemoideae). T. trifaria e D. lombardii apresentam corpos silicosos nos caules e nas folhas, enquanto W. squamulosa possui estas estruturas restritas às folhas escamiformes. A diversidade morfológica dos corpos silicosos, específica para cada espécie aqui estudada, comprova o potencial taxonômico deste caráter, até então negligenciado, e aponta para a necessidade de estudos mais abrangentes para essas estruturas em Podostemaceae. Palavras-chave: corpos silicosos, plantas aquáticas, Podostemaceae.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silica bodies and their systematic implications at the subfamily level in Podostemaceae

et al. 2011

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“…The aquatic habitat is not correlated in any way with the seedling structure. Even the highly derived aquatic Podostemaceae have retained dicotylar seedlings (Cook & Rutishauser 2007). All monocotylar eudicots so far known are land plants.…”

Section: Discussionmentioning

confidence: 99%

Do Hydatellaceae belong to the monocotyledons or basal angiosperms? Evidence from seedling morphology.

Tillich¹,

Tuckett²,

Facher³

2007

Willdenowia

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“…Podostemaceae invaded aquatic environments after they diverged from Hypericaceae: the unusual morphology, involving fuzzy morphology and change in plant axis, remarkably differ from the ordinary body plan for terrestrial angiosperms (Rutishauser, 1997;Cook and Rutishauser, 2007;Kato, 2013). The morphology also is different among the subfamilies; Tristichoideae are primitive, while Podostemoideae are derivative (Fig.…”

Section: Morphological (And Physiological) Characters Changed Drasticmentioning

confidence: 99%

“…About 20 genera and ~137 species of three subfamilies occur in South, Central and rarely eastern North America; ~17 genera and ~80 species in two subfamilies are in tropical and southern Africa and Madagascar; and ~18 genera and ~84 species of the same two subfamilies are in southern, southeastern and eastern Asia and rarely in northern Australia (Cook and Rutishauser, 2007;Tippery et al, 2011;Koi et al, 2012a). All genera but one are endemic to a single continent, indicating that the distribution patterns of the genera characterize the biogeography of Podostemaceae.…”

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confidence: 99%