Acta Botanica Brasilica最新文献_第9页

Who are the pollinators of Petunia interior (Solanaceae) and how are they attracted to flowers? 谁是矮牵牛花(茄科)的传粉者?它们是如何被花吸引的?

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0209

Suzana dos Santos de Souza, R. F. Ramos, Nessana Dartora, C. M. G. Pelegrin, Mardiore Pinheiro

{"title":"Who are the pollinators of Petunia interior (Solanaceae) and how are they attracted to flowers?","authors":"Suzana dos Santos de Souza, R. F. Ramos, Nessana Dartora, C. M. G. Pelegrin, Mardiore Pinheiro","doi":"10.1590/0102-33062021abb0209","DOIUrl":"https://doi.org/10.1590/0102-33062021abb0209","url":null,"abstract":"Many features of flowers comprise the key elements of the pollinating strategies of flowering plants. Our aims were to describe features that attract pollinators and to identify the pollination system of Petunia interior, a species for which bees have been suggested as the probable pollinators. Therefore, we described the morphology and floral biology, assessed nectar production, concentration, and composition, examined reproductive mode and identified pollinators. P. interior has a purple, infundibuliform, zygomorphic corolla with a short and wide tube and blue pollen. Flower opening and pollen release were asynchronous throughout the day. The pollen grains have pollenkitt on the surface. The nectar sugar composition has a proportion of sucrose lower than the proportion of glucose + fructose, and the nectar supply was constant, in small amounts, at a concentration between 16.6-23.1 %. The reproductive system is xenogamous and bees were the exclusive pollinators. P. interior exhibits a set of floral traits that prevent self-pollination and maintains attractiveness to the bees. The greater reproductive success under natural conditions highlights the importance of bees for the reproductive success of P. interior. As far as floral traits are concerned, only the sugar concentration in the nectar does not correspond to melittophily.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":"794 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78864288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mabea dalyana (Euphorbiaceae-Hippomaneae): a new subshrub with xylopodia endemic to the savannas of the Brazilian Amazon 大戟属(大戟科-大戟科):巴西亚马逊热带稀树草原特有的一种新的木足亚灌木

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0039

N. C. Bígio, R. S. Secco, H. Esser, D. Alves, A. F. D. Silveira, Rubens Sousa Ramos, C. B. Anjos, Késia da Silva Gonçalves

{"title":"Mabea dalyana (Euphorbiaceae-Hippomaneae): a new subshrub with xylopodia endemic to the savannas of the Brazilian Amazon","authors":"N. C. Bígio, R. S. Secco, H. Esser, D. Alves, A. F. D. Silveira, Rubens Sousa Ramos, C. B. Anjos, Késia da Silva Gonçalves","doi":"10.1590/0102-33062021abb0039","DOIUrl":"https://doi.org/10.1590/0102-33062021abb0039","url":null,"abstract":"During fieldwork in the Campos Amazônicos National Park, Amazonas state, Brazil, a new endemic species of Mabea was collected in savanna areas. Field collections and specimens in RON, MG, and HRCB were analyzed. To understand the species distribution and verify possible areas of occurrence, niche modeling was conducted using the sdm package in R. Mabea dalyana , the new species is a subshrub with xylopodia and reduced size (less than 1 m height) and small, yellow thyrses. There are several allopatric species of Mabea growing in Amazonian savannas, some widespread but others locally restricted, such as M. uleana from central Amazonia that has some superficial resemblance in leaves and inflorescences but can be distinguished from M. dalyana by pubescent adaxial leaf surface ( vs. glabrous), 12-21 submarginal glands ( vs. 10 submarginal glands), thyrse brownish to red ( vs. yellow thyrse) and conspicuous caruncle ( vs. caruncle inconspicuous). M. dalyana is endemic to hyperseasonal savanna, very well adapted to savanna, and fire tolerant. It has notable characteristics, such as a subshrub habit, a xylopodium, glabrous leaves, and sepals noticeably larger than the ovary.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":"22 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83552641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phenology, abundance and efficiency of pollinators drive the reproductive success of Sarcoglottis acaulis (Orchidaceae) at the Atlantic Forest 在大西洋森林，传粉者的物候、丰度和效率驱动着兰科植物的繁殖成功

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0121

N. S. Albuquerque, P. Milet‐Pinheiro, D. D. Cruz, G. M. Pimentel, Aércia C. Sousa, Adriennius M. Carneiro, I. Machado

引用次数: 0

Synopsis of Orchidaceae Juss. in the northern lowland Atlantic Forest 兰科植物概述。在北部低地大西洋森林

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/1677-941x-abb-2022-0098

Luiz Henrique Liberato Moreira, C. Berg, M. D. R. Barbosa

引用次数: 0

Pitcairnia mineira (Bromeliaceae): A new rheophytic species from the Espinhaço Range, Brazil 山凤梨科:巴西espinharado山脉一新种

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0377

Brenda de Moura Carvalho, R. Forzza

引用次数: 0

What is the influence of anthropogenic impact on the population structure of Attalea speciosa Mart. ex Spreng. in the Brazilian Amazonian region? 人为影响对Attalea speciosa Mart种群结构的影响。Spreng交货。在巴西亚马逊地区?

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062020abb0543

Alessio Moreira dos Santos, D. Mitja, I. Miranda, P. Loisel, E. Delaître, L. Demagistri

{"title":"What is the influence of anthropogenic impact on the population structure of Attalea speciosa Mart. ex Spreng. in the Brazilian Amazonian region?","authors":"Alessio Moreira dos Santos, D. Mitja, I. Miranda, P. Loisel, E. Delaître, L. Demagistri","doi":"10.1590/0102-33062020abb0543","DOIUrl":"https://doi.org/10.1590/0102-33062020abb0543","url":null,"abstract":"Attalea speciosa (babassu) is a native palm of the primary forest from Amazonian and Cerrado biomes, and has multiple economic and cultural uses. However, this palm can become dominant in open areas, with a long-term persistence in the community. The objective of this study was to compare the population structure and morphology of babassu in three habitat types characterizing forest succession: primary forest, pasture, and babaçual (babassu-dominated secondary forest). For this purpose, we monitored 6,333 individuals for three years at six life stages in 11 sites with 25 plots located in PA-Benfica, Itupiranga-Pará, Brazil. The morphological parameters showed differences between secondary environments (pasture and babaçual) and primary forests, suggesting that this species has a high capacity for phenotypic plasticity. The inverse J-shaped distribution was observed only in primary forests, with the density of all stages constant along the whole study, unlike pastures and babaçual areas. While the density of seedlings is highest in primary forests, stage 4 and 5 juveniles and adults are most numerous in babaçuals. Our results suggest that the higher dominance of A. speciosa in babaçual areas can be associated with the resilience of this species to anthropogenic disturbances.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":"40 8 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89992186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climate variations affect the growth period of young Tectona grandis Linn F. in the Amazon 气候变化对亚马逊地区大地构造幼树生长时期的影响

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062020abb0525

F. H. Carmo, J. V. Latorraca, M. Volpato, G. C. Santos, Poliane Pereira de Souza, Fausto H Takizawa

{"title":"Climate variations affect the growth period of young Tectona grandis Linn F. in the Amazon","authors":"F. H. Carmo, J. V. Latorraca, M. Volpato, G. C. Santos, Poliane Pereira de Souza, Fausto H Takizawa","doi":"10.1590/0102-33062020abb0525","DOIUrl":"https://doi.org/10.1590/0102-33062020abb0525","url":null,"abstract":"Climate change is expected to increase the occurrence of severe droughts in the tropics, and little is known about its influence on tree dynamics. Tree-ring width and remote sensing tools can help understand the impacts of climate change on tree growth. We evaluated the applicability of NDVI to obtain phenological metrics ( e.g. , start, peak, end, and length of growth season) and explored its relationship with tree-ring width of Tectona grandis (teak). The phenological metrics and tree-ring width were correlated with each other, and with both local (temperature, precipitation, solar insolation, Standardized Precipitation Evapotranspiration Index – SPEI) and large-scale (El Niño) climatic variables. The length of season and tree-ring width of teak were positively correlated with precipitation and negatively correlated with temperature in the initial months of the growth period. Tree-ring width was negatively correlated with El Niño events. Climate variables and length of season from the prior period were correlated with the tree-ring width of the current growing period. This study demonstrated that rather than directly affecting productivity, climate might also affect the length of the growing season, which would affect tree growth in the next season.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":"41 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89085159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Floristic inventory and conservation of one of the most striking coastal mountains in the Brazilian Atlantic Forest 巴西大西洋森林中最引人注目的沿海山脉之一的植物区系清单和保护

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0038

R. Valadares, V. F. Dutra, Aline D. Firmino, D. Iglesias, Lucas A. Silva, P. Barros, V. C. Freitas, W. C. Cardoso, André M. Assis, José M. L. Gomes

{"title":"Floristic inventory and conservation of one of the most striking coastal mountains in the Brazilian Atlantic Forest","authors":"R. Valadares, V. F. Dutra, Aline D. Firmino, D. Iglesias, Lucas A. Silva, P. Barros, V. C. Freitas, W. C. Cardoso, André M. Assis, José M. L. Gomes","doi":"10.1590/0102-33062021abb0038","DOIUrl":"https://doi.org/10.1590/0102-33062021abb0038","url":null,"abstract":"The Atlantic Forest is made up of different vegetation types over extensive latitude. Most of its remnants are in mountain ranges, which are responsible for the maintenance of most endemic and threatened species in this domain. Here we present the floristic composition of the Área de Proteção Ambiental Mestre Álvaro (APAMA), a coastal massif at Espírito Santo State with expressive altitudinal amplitude (100-800 a.s.l.) containing remnants never floristically studied. Knowing the composition of this protected area is important because it includes an altitudinal range not yet evaluated in floristic comparisons involving highland and lowland forests between the latitudes 18-21° S. We found 493 species (in 292 genera and 91 families): ten are regional endemic species, nine are new records of occurrence for the state, and 52 are under some degree of threat of extinction. Our results indicate the presence of flora elements’ typical of both highland and lowland forests, which makes the APAMA essential in a scenario extremely fragmented. Finally, our data provide an unprecedented floristic list for regional forest restoration projects, as well as an invaluable source of data for biogeographic studies that seek to understand the effect caused by neighboring vegetation types on the composition of lowland forests.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":"25 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78880118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

On the identity of Oocephalus lythroides (Hyptidinae, Lamiaceae): a new combination in the genus Cantinoa 论赤角卵头虫属的同一性:Cantinoa属的新组合

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/0102-33062021abb0302

A. Soares, R. Harley, J. Pastore, J. Jardim

引用次数: 0

Synopsis of the Piper subgenus Ottonia Spreng. (Piperaceae) from Brazil 标题笛手亚属概要。(胡椒科)产于巴西

IF 1.1 4区生物学

Acta Botanica Brasilica Pub Date : 2022-01-01 DOI: 10.1590/1677-941x-abb-2021-0360

Micheline Carvalho-Silva, Paulo Eduardo Aguiar Saraiva Câmara, E. Guimarães

引用次数: 0