Article
Anatomy & Morphology
Neelam Rashid, Muhammad Zafar, Mushtaq Ahmad, Rabia Asma Memon, Muhammad Salim Akhter, Khafsa Malik, Nafeesa Zahid Malik, Shazia Sultana, Syed Nasar Shah
Summary: Seed morphology of 12 species from tribes Astragaleae and Trifolieae was studied using scanning electron microscopy (SEM) to evaluate taxonomic relevance and identify diagnostic features. Species-specific characteristics were determined based on seed shape, size, and ornamentation, with distinct cell patterns observed. The study suggests that SEM can be valuable for species identification within these tribes.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Plant Sciences
Duilio Iamonico, Amara Noor Hussain, Arya Sindhu, Venugopalan Nair Saradamma Anil Kumar, Shabnum Shaheen, Mamoona Munir, Paola Fortini
Summary: Amaranthus is a taxonomically complex genus due to its high morphological variability, which results in nomenclatural disorders and misidentifications. Seed micromorphology shows promise in the taxonomy of Amaranthus, but current investigations are limited. In this study, a detailed SEM analysis was conducted on 25 Amaranthus taxa, revealing interesting new taxonomic data. Several seed types were identified, but some species within the deflexus-type were not distinguishable based on seed features. A diagnostic key for the studied taxa was proposed, but subgenera could not be distinguished using seed features, confirming previous molecular data.
Article
Microscopy
A. Bonfitto, R. Randi, L. Alibardi
Summary: Among lizards, geckos possess unique digital scales modified as lamellae that allow attachment to vertical substrates. The present study provides new details on the formation of adhesive setae in the gecko Tarentula mauritanica. Setae originate from the differentiation of a specialized epidermal layer called Oberhauchen and can reach lengths of 30-60 mu m. The formation of a soft pale layer and a thin beta-layer likely contribute to the flexible support of the adhesive setae, but the underlying molecular mechanism remains unknown.
Article
Plant Sciences
A. Bonfitto, R. Randi, M. Magnani, Lorenzo Alibardi
Summary: The present study describes the variation of micro-ornamentations in scales of the Mediterranean gecko Tarentula mauritanica, revealing that the accumulation of corneous material in Oberhautchen cells is not uniform and gives rise to different sculpturing on the epidermal surface. However, the ecological role of this variable micro-ornamentation in lizard skin remains speculative.
Article
Anatomy & Morphology
Antonio Bonfitto, Davide Bussinello, Lorenzo Alibardi
Summary: Possible variations of micro-ornamentation patterns in gecko skin were analyzed, and differences in pattern and sensory organ distribution were detected. The accumulation of corneous material and cell differentiation may contribute to the variations.
ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
(2023)
Article
Plant Sciences
Agnieszka Rewicz, Marta Kolanowska, Marta Kras, Dariusz L. Szlachetko
Summary: This study analyzed the seed morphology of the orchid genus Habenaria and related taxa. The species of Habenaria studied mostly have scobiform seeds, but the form of individual seed coat cells varies. The ornamentation of the periclinal wall could be used in taxonomic delimitations.
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
(2022)
Article
Mathematics
Lucas Ernesto Alonso, Victoria Romeo Aznar, Hernan Gustavo Solari
Summary: The study found that the spread of Aedes aegypti populations to southern locations may be the result of the mosquito's adaptation rather than directly caused by climate change. As the geographical location moves southward, the impact of diapause on the population becomes increasingly significant.
Article
Geochemistry & Geophysics
Caio Ciardelli, Marcelo Assumpcao, Ebru Bozdag, Suzan van der Lee
Summary: This study used 3D spectral-element seismic wave simulations and earthquake data to construct an adjoint waveform tomographic model of South America. The model reveals the structure of the mantle in South America and provides high-resolution imaging.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Plant Sciences
O. S. M. A. N. TUGAY, H. U. S. E. Y. I. N. DURAL, B. U. R. C. U. Y. I. L. M. A. Z. CITAK, Kuddisi Ertugrul, Metin Armagan, S. E. R. C. A. N. KARAGOZ, E. S. E. N. G. U. L. KARAHISAR, D. E. N. I. Z. ULUKUS
Summary: The research focused on anatomical, palynological, and micromorphological characteristics of three endemic Bellevalia species in Turkey, revealing descriptive traits of the species and contributing to taxonomic problem-solving. Anatomical studies highlighted significant differences in metaxylem, root cortex cells, and scape cell numbers for taxonomy. Pollen grains were monosulcate and showed heteropolarity, with variations in exine sculpturing and pollen muri walls among the species. Seed surfaces exhibited a general similarity with reticulate faveolate ornamentation across all species.
Review
Plant Sciences
Sylvia P. Kinosian, Carol A. Rowe, Paul G. Wolf
Summary: The mechanisms controlling chromosome number and its relationship to genome size in plants are not fully understood. There is a stark difference in chromosome number between homosporous and heterosporous lineages, and understanding the reasons behind this difference is of great importance for evolutionary biology.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Studies
Thauan Santos
Summary: This article suggests a regional approach to achieving energy security in South America, using an Open Source energy Modelling System to create scenarios with different levels of energy integration. The study shows that more integrated scenarios lead to a reduction in the need for increased installed capacity, lower geographic and socio-environmental impacts, and mitigation of greenhouse gas emissions.
ENERGY RESEARCH & SOCIAL SCIENCE
(2021)
Article
Multidisciplinary Sciences
Geovane Alves de Souza, Marina Bento Soares, Luiz Carlos Weinschutz, Everton Wilner, Ricardo Tadeu Lopes, Olga Maria Oliveira de Araujo, Alexander Wilhelm Armin Kellner
Summary: The discovery of a new toothless ceratosaur in Brazil challenges previous assumptions about the diets of these dinosaurs, suggesting a potential herbivorous or omnivorous lifestyle and highlighting the diversity within the Ceratosauria lineage.
SCIENTIFIC REPORTS
(2021)
Article
Meteorology & Atmospheric Sciences
Amanda Rehbein, Tercio Ambrizzi
Summary: ENSO events have been studied extensively due to their significant impact on climate and weather in South America. Most attention has been given to the warm phase (El Nino events) during the austral summer. However, it is still unclear how the teleconnection patterns are modified based on the different intensities of ENSO events in different seasons, and the subsequent impact on South America. This study aims to investigate how the different phases, intensities, and seasons of ENSO events modulate the Stationary Rossby Waves that impact South America. A tool called raytracing was developed for this purpose. The distribution of SST anomalies influences ENSO intensity, with higher and wider anomalies leading to stronger ENSO events. Weak ENSO events result in weak anomaly precipitation over South America, particularly in the southeast region. The position of stationary Rossby waves varies during El Nino and La Nina events, with El Nino causing them to be slightly closer to the equator and La Nina positioning them poleward. The wave shape and amplitudes remain constant during summer events regardless of ENSO intensity, demonstrating the robustness of precipitation anomaly patterns over South America. However, in other seasons, these wave features exhibit larger variations and heavily influence the position and signal of precipitation anomalies over South America, with positive anomalies associated with downstream crests and negative anomalies associated with downstream troughs/upstream crests.
Article
Geosciences, Multidisciplinary
Bolivar Paredes-Beltran, Alvaro Sordo-Ward, Luis Garrote
Summary: Dams and their reservoirs play a significant role in society and the environment, facilitating water resource management while potentially causing adverse impacts related to safety, ecology, and biodiversity. Studies suggest that climate change could exacerbate these impacts, underscoring the importance of continuous monitoring and research on dams.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Plant Sciences
Bokyung Choi, Jangseung Ryu, Tae-Soo Jang
Summary: This study used scanning electron microscopy to describe the pollen morphology of Korean Iris. The observed pollen micromorphological characters, including size, shape, and exine ornamentation, enabled species distinction and taxonomic delimitation. The pollen morphological data presented in this study are of systematic significance to Korean Iris species.
Article
Plant Sciences
Domingos Lucas dos Santos-Silva, Jefferson Prado, Pedro V. Eisenlohr
Summary: This study examined the floristics, biogeography, and conservation status of ferns from rocky environments in Southern Amazonia. The findings showed that ferns from the Pteridaceae family and the genus Anemia were the most representative taxa in rocky environments, with most of the species being terrestrial. The sampled taxa have a wide distribution, but some are classified as threatened or vulnerable.
BRAZILIAN JOURNAL OF BOTANY
(2023)
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Editorial Material
Plant Sciences
Michael Wisnev, Jefferson Prado
Review
Plant Sciences
Isis De Mello Rollim, Guilherme Peres Coelho, Silvia Teresinha Sfoggia Miotto, Joao Ricardo Vieira Iganci, Marcelo Trovo
Summary: This article revises the species of the Campanulaceae described by Vellozo in his Flora Fluminensis. While Vellozo placed all of them in the genus Lobelia, previous revisions have synonymized three names with other genera. The study identifies L. alpina as a synonym of L. camporum and recognizes only L. fistulosa as a valid name among Vellozo's descriptions. The article designates five lectotypes and includes photos of the known species in situ.
Article
Plant Sciences
Bianca Leticia De Souza Pinto, Jefferson Prado, Juliana Marzinek, Cassiano A. Dorneles Welker
Summary: During taxonomic studies of the genus Imperata, there were typification issues with five species from the New World. This paper designates lectotypes for these names and provides images of the selected lectotypes.
Article
Plant Sciences
Marcelo Trovo, Livia Echternacht
Summary: This study reports new morphological data on Paepalanthus balansae, P. lundii, and P. scholiophyllus, providing insights into their circumscription. Paepalanthus balansae is confirmed as a distinct species, while the wide morphological variation of P. scholiophyllus is understood within a broader P. lundii concept and treated as synonymous. The presence of short lateral branches covered by a few bracts and subtending a single or a few inflorescences is reported for the first time in P. lundii and P. balansae. This, along with floral details and limited molecular data, supports their close relationship to Actinocephalus. Nomenclatural adjustments for types and infrageneric names are provided, along with a distribution map and images.
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Editorial Material
Plant Sciences
Michael A. Wisnev, Jefferson Prado
Article
Plant Sciences
Lucas Paradizo Roma, Regina Yoshie Hirai, Jefferson Prado, Deborah Yara A. C. Santos
Summary: In this study, the chemical composition of waxes on fertile and sterile fronds of Gleichenella pectinata was analyzed. The results showed no difference in total wax content between sterile and fertile fronds. Ketones and aldehydes were the most abundant classes in the waxes, with ketones being more prominent in epicuticular waxes and aldehydes being more prominent in intracuticular waxes. The wax composition of G. pectinata showed similarities with Osmunda regalis L., but differences were found compared to other eusporangiate and recent leptosporangiate ferns.
BRAZILIAN JOURNAL OF BOTANY
(2023)
Article
Plant Sciences
Pedro Henrique Cardoso, Fatima Regina Goncalves Salimena, Nadia Somavilla, Luiz Menini Neto, Marcelo Trovo
Summary: The flora of the Serra do Cipo in Brazil has been extensively studied, and a new species of Verbenaceae, Stachytarpheta odorata, is described and illustrated. This species has unique characteristics such as sticky and heavily aromatic shrub, abundant glandular trichomes, and deeply immersed calyx in the inflorescences. Despite efforts to rediscover it in its natural habitat, S. odorata has been collected only once. However, cultivated individuals are kept in a greenhouse, which could potentially be used for reintroduction programs. Additionally, a checklist and identification key update the Verbenaceae diversity in Serra do Cipo, recognizing six genera and 29 taxa.
TROPICAL PLANT BIOLOGY
(2023)
Article
Plant Sciences
Michel Boudrie, Georges Cremers, Jefferson Prado
Summary: This paper presents the lectotypification of 57 names of ferns and lycophytes, belonging to a total of 60 taxa. These names mainly represent species found in the Guianas and other areas in the Neotropical region. The majority of these names (46) are synonyms, while the rest (14) are currently in use. Out of the 57 lectotypifications, 45 were newly designated in this study, 10 were previously designated but overlooked, and 2 were second-step lectotypifications. Information about the presence of barcode or accession numbers is provided for all cited types, enabling easy access to the type specimens and their images through the World Wide Web.
AMERICAN FERN JOURNAL
(2023)
Article
Plant Sciences
Ana Lucia Brozoski, Jefferson Prado, Paulo Henrique Labiak
Summary: This study presents the taxonomic treatment of the genus Adiantum (Pteridaceae) in the state of Parana, Brazil. It records 15 species and provides morphological descriptions, identification keys, comments, distribution maps, and illustrations to facilitate species identification.
IHERINGIA SERIE BOTANICA
(2023)
