Secretory ducts in Anacardiaceae revisited: Updated concepts and new findings based on histochemical evidence

Tölke, Elisabeth Dantas; Lacchia, Ana Paula Stechhahn; Lima, E.A. Luna Alves; Demarco, Diego; Ascensão, Lia; Carmello-Guerreiro, Sandra Maria

doi:10.1016/j.sajb.2021.01.012

Cited by 20 publications

(11 citation statements)

References 64 publications

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“…Notably, the resin ducts of Alismataceae are narrow and lack a sheath (this study), as observed in the ducts of Clusiaceae [29,44]. Sheaths formed by two cell layers surrounding the duct occur in Anacardiaceae [45], Hypericaceae [46], and Araceae [47]. Narrow secretory ducts are not common in angiosperms, but they have also been reported in Philodendron adamantinum Mart.…”

Section: Resin Duct Structuresupporting

confidence: 58%

“…Of the 14 Alismatales families, only two have secretory ducts and are not closely related according to molecular analysis [63]. Thus, the secretory structures demonstrate an independent origin in the order, as observed in other orders such as Sapindales [14,45]. The presence of secretory ducts in Limnocharitaceae and Alismataceae had led some researchers to suggest that Limnocharitaceae should be included in Alismataceae [18], as later confirmed by molecular analysis [2].…”

Section: Taxonomic Implicationsmentioning

confidence: 94%

“…Generally, the secretion of secretory ducts may be classified as resin, mucilage or gum [14,25] according to its composition. Mucilage ducts occur in Malvaceae [51] and Calophyllaceae [38]; resin ducts in Araceae [47], Clusiaceae [29] and Anacardiaceae [45]; and gum ducts in Calophyllaceae [38]. However, the complex composition of some resins, which confers white color to the exudate, has caused misinterpretation and has led some researchers to call it "latex", as in the case of Alismataceae ( [19,20], this study), Anacardiaceae [14,52,53] and Clusiaceae [14,44].…”

Section: Secretion Composition and Functionsmentioning

confidence: 99%

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New Aspects of Secretory Structures in Five Alismataceae Species: Laticifers or Ducts?

Leme

Bento

Fabiano

et al. 2021

Plants

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The secretory structures of Alismataceae have been described as secretory ducts, laticifer ducts, laticifer canals or schizogenous ducts. However, these terms are not found in the specialized literature, and ontogenetic analyses for the exact classification of these structures are missing. Accordingly, more studies regarding the secretory structures of Alismataceae are necessary to establish homology in the family or in the order. Thus, the aim of this study was to describe the anatomy, ontogeny, distribution in the organs and exudate composition of the secretory structures present in five Alismataceae species in order to determine whether the family has laticifers or secretory ducts. Samples of leaves, flowers and floral apices were processed for anatomical and histochemical analyses by light microscopy. The analysis indicated the presence of anastomosing secretory ducts in all species, occurring in both leaves and flowers. The exudate contains lipids, alkaloids, proteins and polysaccharides, including mucilage. The secretory duct structure, distribution and exudate composition suggest a defense role against herbivory and in wound sealing. The presence of secretory ducts in all species analyzed indicates a probable synapomorphy for the family.

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Section: Resin Duct Structuresupporting

confidence: 58%

Section: Taxonomic Implicationsmentioning

confidence: 94%

Section: Secretion Composition and Functionsmentioning

confidence: 99%

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New Aspects of Secretory Structures in Five Alismataceae Species: Laticifers or Ducts?

Leme

Bento

Fabiano

et al. 2021

Plants

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“…The exudate from T. guianensis appears to be of a mixture of gums and resin, as was recently proposed for the Anacardiaceae family [ 28 ]. The Hagen-Poiseuille Equation was inadequate for understanding the flow of exudates in bark wounds, as gum-resins do not behave like Newtonian liquids [ 29 ].…”

Section: Discussionmentioning

confidence: 80%

“…After being secreted by the tree, the exudate comes into contact with the air and polymerizes, hardening [ 28 ]. Marmosets consume only liquid exudates, rejecting those with a hard consistency [ 12 ].…”

Section: Discussionmentioning

confidence: 99%

Tree Species and Morphology of Holes Caused by Black-Tufted Marmosets to Obtain Exudates: Some Implications for the Exudativory

Lamoglia

Boere

Picoli

et al. 2022

Animals

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Knowledge of the pattern of exploitation of trees can help us understand the relationship between marmosets and plants, especially in declining forests, such as those in the Brazilian Cerrado. Black-tufted marmosets (Callithrix penicillata) regularly exploit exudates by gouging the bark of trees with their specialized teeth. Determining preferred tree species to exploit exudates is important for forest management aimed at maintaining an essential food source for urban marmosets. We characterized the tree species, dendrometry, and the characteristics of the holes made by marmosets to obtain exudates. Based on these data, we proposed a gouging effort index (Chiseling Suitability Index for Marmosets, ChiSI). We identified 16 species belonging to 10 families of trees with gouging marks made by marmosets. Eleven new tree species used by black-tufted marmosets for exudates were identified in urban forests in the Cerrado. Exudate exploration was predominantly of medium intensity, with round holes concentrated in the canopy. The species Tapirira guianensis and Croton urucana were preferred. The ChiSI was characterized by a narrow range for both T. guianensis and C. urucana. Despite the flexibility of obtaining exudates, the black-tufted marmosets concentrate their exploitation to only a few tree species. The T. guianensis and C. urucana tree species should be considered the most important species for management plans and the preservation of black-tufted marmosets that live in urban forests in the Cerrado.

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Histochemical Analysis of Plant Secretory Structures

Demarco

2022

Methods in Molecular Biology

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Secretory ducts in Anacardiaceae revisited: Updated concepts and new findings based on histochemical evidence

Cited by 20 publications

References 64 publications

New Aspects of Secretory Structures in Five Alismataceae Species: Laticifers or Ducts?

New Aspects of Secretory Structures in Five Alismataceae Species: Laticifers or Ducts?

Tree Species and Morphology of Holes Caused by Black-Tufted Marmosets to Obtain Exudates: Some Implications for the Exudativory

Histochemical Analysis of Plant Secretory Structures

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