Epidermal features allowing identification of evolutionary lineages in the Ocotea complex (Lauraceae)

Trofimov, Dimitrij; Rohwer, Jens G.

doi:10.1016/j.ppees.2017.12.003

Cited by 12 publications

(10 citation statements)

References 31 publications

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“…The polygonal to irregular epidermal cell shape and the straight to sinuous anticlinal walls have been described in previous reports (e.g. Christophel et al 1996 and Christophel 1999;van der Werff 2007, 2011;Yang et al 2012;Trofimov and Rohwer 2018), but our study suggests that sect. Cinnamomum s.l.…”

Section: Discussionsupporting

confidence: 67%

“…Leaf epidermal micromorphology has been considered to be of taxonomic importance within the Lauraceae (Christophel et al 1996;Nishida and Christophel 1999;Nishida and van der Werff 2007, 2011Yang et al 2012;Zeng et al 2014;Nishida et al 2016;Trofimov and Rohwer 2018), but its systematic significance has rarely been discussed within a phylogenetic context. In this study, we report micromorphological observations in Asian Cinnamomum, and discuss their systematic significance.…”

Section: Introductionmentioning

confidence: 99%

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Leaf epidermal micromorphology defining the clades in Cinnamomum (Lauraceae)

Zeng¹,

Liu²,

Rohwer³

et al. 2021

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In this study, we sampled 48 species of Asian Cinnamomum covering the species groups that were identified in recent phylogenetic studies and conducted leaf micromorphological observations using both light microscopy (LM) and scanning electron microscopy (SEM). Synapomorphies were determined by means of mapping micromorphological characters on a phylogenetic tree. The results indicate that Cinnamomum exhibits two different types of leaf upper epidermis: Type I has smooth/non-reticulate periclinal walls whereas Type II has reticulate periclinal walls and is unusual in the family Lauraceae. We found that the two types of micromorphological characters are clade-specific, sect. Camphora s.s. possesses Type I leaf upper epidermis, and sect. Cinnamomum s.l. has Type II leaf upper epidermis. Our study also reveals that C. saxatile, a member of sect. Camphora s.l. in the traditional classification, actually has Type II leaf upper epidermis, thus reinforcing the result of a recent molecular phylogeny that has this species in a clade consisting mainly of species of sect. Cinnamomum.

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Section: Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Leaf epidermal micromorphology defining the clades in Cinnamomum (Lauraceae)

Zeng¹,

Liu²,

Rohwer³

et al. 2021

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“…Within this clade, Catula is more similar to venation patterns present in Cinnamomum [96] though it can be difficult to differentiate species of Cinnamomum and Ocotea simply on vegetative characters. Until recently [98], Old and New World species in Ocotea have been considered by most workers to form a polyphyletic or, at least, paraphyletic clade [99,100]. New work has led to well-supported clades, including proposing some outlying Old World Ocotea species be reclassified in the new genus Kuloa [101].…”

Section: Plos Onementioning

confidence: 99%

Insect herbivory on Catula gettyi gen. et sp. nov. (Lauraceae) from the Kaiparowits Formation (Late Cretaceous, Utah, USA)

et al. 2022

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The Upper Cretaceous (Campanian Stage) Kaiparowits Formation of southern Utah, USA, preserves abundant plant, invertebrate, and vertebrate fossil taxa. Taken together, these fossils indicate that the ecosystems preserved in the Kaiparowits Formation were characterized by high biodiversity. Hundreds of vertebrate and invertebrate species and over 80 plant morphotypes are recognized from the formation, but insects and their associations with plants are largely undocumented. Here, we describe a new fossil leaf taxon, Catula gettyi gen et. sp. nov. in the family Lauraceae from the Kaiparowits Formation. Catula gettyi occurs at numerous localities in this deposit that represent ponded and distal floodplain environments. The type locality for C. gettyi has yielded 1,564 fossil leaf specimens of this species, which provides the opportunity to circumscribe this new plant species. By erecting this new genus and species, we are able to describe ecological associations on C. gettyi and place these interactions within a taxonomic context. We describe an extensive archive of feeding damage on C. gettyi caused by herbivorous insects, including more than 800 occurrences of insect damage belonging to five functional feeding groups indicating that insect-mediated damage on this taxon is both rich and abundant. Catula gettyi is one of the best-sampled host plant taxa from the Mesozoic Era, a poorly sampled time interval, and its insect damage is comparable to other Lauraceae taxa from the younger Late Cretaceous Hell Creek Flora of North Dakota, USA.

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“…As observed in this study, the leaves of O. paranaensis (Figure 1a) in surface view evidence straight or slightly curved thin anticlinal cell walls on both adaxial (Figure 1a) and abaxial (Figure 1e) epidermises. In Lauraceae, the anticlinal cell walls can be curved, undulate, sinuate, straight, or Ω‐shaped (Trofimov & Rohwer, 2018, 2020). In Ocotea , the shapes of the anticlinal cell walls are valuable features in distinguishing species (Betim et al, 2020; Gomes‐Bezerra et al, 2018; Trofimov & Rohwer, 2018, 2020).…”

Section: Resultsmentioning

confidence: 99%

Microscopic investigations of Ocotea paranaensis―A Brazilian endemic and endangered species

Gribner

Barbosa

Monteiro

et al. 2022

Microscopy Res & Technique

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This article describes the morpho-anatomies of the leaves and stems of Ocotea paranaensis Brotto, Baitello, Cervi & Santos (Lauraceae) using light and scanning electron microscopy. The main anatomical features characterizing the species are the presence of simple non-glandular trichomes in the leaves and stems, large secretory cells in the leaves, flat-convex petioles with two small lateral ribs, brachysclereids in the stem cortex and pith, and the presence of starch grains and various types of calcium oxalate crystals in the pith. Histochemical tests indicated the presence of lignin in stone cells, fibers, and xylem. Lipophilic contents were found in the secretory cells.Phenolic compounds were detected in the epidermis, hypodermis, phloem, and xylem. The present study's findings can contribute to the taxonomy and authentication of O. paranaensis. Research highlights• This article is the first morpho-anatomical study of Ocotea paranaensis.• Anatomy and histochemistry of the leaves and stems were studied by light microscopy, FESEM and EDS.• The findings of this study would aid in the species identification and taxonomy.

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Epidermal features allowing identification of evolutionary lineages in the Ocotea complex (Lauraceae)

Cited by 12 publications

References 31 publications

Leaf epidermal micromorphology defining the clades in Cinnamomum (Lauraceae)

Leaf epidermal micromorphology defining the clades in Cinnamomum (Lauraceae)

Insect herbivory on Catula gettyi gen. et sp. nov. (Lauraceae) from the Kaiparowits Formation (Late Cretaceous, Utah, USA)

Microscopic investigations of Ocotea paranaensis―A Brazilian endemic and endangered species

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