Morphological aspects of fruits, seeds and seedlings of Rhamnidium elaeocarpum Reissek

Silva, Lílian Abadia da; Sales, Juliana de Fátima; Guimarães, Renato Mendes; Oliveira, João Almir; Filho, Sebastião Carvalho Vasconcelos

doi:10.5433/1679-0359.2015v36n3p1179

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Its release onto the environment occurs only by rupture of the secretory system. We verified that these floral cavities and ducts are filled with oil, as also observed in R. elaeocarpum leaves and seeds [11,37]. Resin cavities and ducts have been described for the leaves of the phylogenetically related species Auerodendron reticulatum, Karwinskia, Reynosia revoluta, and Rhamnidium glabrum (Table S1, Figure 6).…”

Section: An Overview Of the Secretory Structures Of Rhamnaceaesupporting

confidence: 84%

“…Their pharmacological uses in folk medicine are due to their curative properties, which are provided by products of secondary metabolism. It is notable that most research in the family has been concentrated on screening the chemical compounds and the biological activities of plant extracts of specific genera such as Ziziphus ( Z. jujuba , Z. joazeiro , Z. spina-christi ) and Hovenia ( H. dulcis ) due to the commercialization of their fruits and pseudo-fruits [ 17 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. This type of interest restricts the sampling in relation to the total number of species.…”

Section: Introductionmentioning

confidence: 99%

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Uncovering the Neglected Floral Secretory Structures of Rhamnaceae and Their Functional and Systematic Significance

Ribeiro

Marinho

Teixeira

2021

Plants

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Rhamnaceae flowers are notably recognized by their fleshy nectary. Other types of floral secretory structures have been scarcely reported for this family. Thus, the objective of the present study was to update the occurrence of these structures in the family and to contribute to the knowledge of their morphology and systematic significance. To this end, we carried out an extensive bibliographic search on the secretory structures of the family and obtained data for 257 taxa. Additionally, we presented here novel data (surface, anatomy, and ultrastructure) for six species belonging to the main clades within Rhamnaceae. The family has a wide diversity of types of mucilage-secreting structures: epidermis, hypodermis, idioblasts, cavities, and ducts. Mucilage and phenolic idioblasts are widely distributed among the floral organs. Colleters are present in all sampled species, and these are the first reports of their occurrence in floral organs of Rhamnaceae. The information obtained about the structure, secreted content, and occurrence of the secretory structures of Rhamnaceae helped us to understand the assertive folk use of its species. The absence of mucilage and the presence of resin or mucilage cavities and ducts in some taxa may have intrafamily systematic significance.

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Section: An Overview Of the Secretory Structures Of Rhamnaceaesupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Uncovering the Neglected Floral Secretory Structures of Rhamnaceae and Their Functional and Systematic Significance

Ribeiro

Marinho

Teixeira

2021

Plants

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“…The physiological potential of seeds is inherent to each species. Some studies in the literature argue that the external characteristics of fruits and seeds are important for the understanding of the germination of forest species (Lopes et al, 2005;Silva et al, 2015;Mendonça et al, 2016). As observed by the mini-SAS system, no difference was found regarding external characteristics, therefore, we do not recommend the use of such parameters when doing qualitative evaluation of M. polymorphum seed lots.…”

Section: Characterization Of Seed Lotsmentioning

confidence: 87%

Physical quality of seeds of Moquiniastrum polymorphum

et al. 2019

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This study aimed to analyze the physical properties of the seeds of Moquiniastrum polymorphum when processed by mini-SAS, X-ray and seed blower systems. The seeds were purchased from Seeds Caiçara, located in Penápolis-SP. After purchase, the seed lot was characterized by standard tests. In the X-ray test the seeds were classified according to their internal morphology as filled, unfilled or malformed. The seed blower was set at six opening settings, resulting in light and heavy fractions. The evaluations were performed by weighing the seeds that remained in the blower (heavy fraction) and by the amount of filled seeds indicated by the X-ray test. The germination tests were composed of four replicates of 50 seeds. The mini-SAS was used for external evaluation. It was concluded that the combined use of the seed blower and the X-ray test was efficient for the evaluation and determination of the physical quality of the seeds of M. polymorphum. The seed blower at opening settings 5 resulted in the best lot quality. The external parameters were not able to qualitatively evaluate the seeds of M. polymorphum.

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Diversity of Leaf Glands and Their Putative Functions in Rhamnaceae Species

Iwamoto,

Vicentini,

Ramos

et al. 2023

Plants

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Leaf glands are found in many Rhamnaceae species, the buckthorn family, and are frequently used in taxonomic studies of the group, especially because they are easily visible to the naked eye. Despite the many records and extensive use in the taxonomy of the family, few studies deal with the classification of these glands and their roles for the plant. Thus, this study aimed to unravel the type, functioning, and putative functions of the leaf glands of three Brazilian forest species: Colubrina glandulosa Perkins, Gouania polygama (Jacq.) Urb., and Rhamnidium elaeocarpum Reissek. Leaves were collected and processed for surface, anatomical, histochemical, and ultrastructural analyses. In addition, the presence of visitor animals was registered in the field. The leaf glands of C. glandulosa and G. polygama are defined as extrafloral structured nectaries due to their anatomical structure, interaction with ants, and the presence of reduced sugars and of a set of organelles in the secretory cells. The unusual mechanism of nectar release and exposure in an apical pore stands out in G. polygama. The glands of R. elaeocarpum are ducts or cavities that secrete phenolic oil resin. Their presence is an atypical condition in the family, although they are often confused with mucilage reservoirs, much more common in Rhamnaceae. The extrafloral nectary, secretory cavity, and duct are associated with plant protection against phytophages, either by attracting patrol ants or by making the organs deterrent. Our data, combined with other previously obtained data, attest to the great diversity of gland types found in Rhamnaceae species.

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Morphological aspects of fruits, seeds and seedlings of Rhamnidium elaeocarpum Reissek

Cited by 3 publications

References 9 publications

Uncovering the Neglected Floral Secretory Structures of Rhamnaceae and Their Functional and Systematic Significance

Uncovering the Neglected Floral Secretory Structures of Rhamnaceae and Their Functional and Systematic Significance

Physical quality of seeds of Moquiniastrum polymorphum

Diversity of Leaf Glands and Their Putative Functions in Rhamnaceae Species

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