32 research outputs found
Perspectives in visual imaging for marine biology and ecology: from acquisition to understanding
Durden J, Schoening T, Althaus F, et al. Perspectives in Visual Imaging for Marine Biology and Ecology: From Acquisition to Understanding. In: Hughes RN, Hughes DJ, Smith IP, Dale AC, eds. Oceanography and Marine Biology: An Annual Review. 54. Boca Raton: CRC Press; 2016: 1-72
Use of SMS texts for facilitating access to online alcohol interventions: a feasibility study
A41 Use of SMS texts for facilitating access to online alcohol interventions: a feasibility study
In: Addiction Science & Clinical Practice 2017, 12(Suppl 1): A4
Anatomia de raĂzes de nove espĂ©cies de Bromeliaceae (Poales) da regiĂŁo amazĂ´nica do estado de Mato Grosso, Brasil Anatomy of the roots of nine species of Bromeliaceae (Poales) from the Amazon, Mato Grosso, Brazil
Este estudo busca caracterizar raĂzes de Bromeliaceae: Aechmea bromeliifolia, A. castelnavii, A. mertensii (Bromelioideae), Dyckia duckei, D. paraensis, D. racemosa (Pitcairnoideae), Tillandsia adpressiflora, T. didistachae e T. paraensis (Tillandsioideae) ocorrentes nas regiões amazĂ´nicas (Mato Grosso-MT), procurando levantar caracteres de valor taxonĂ´mico e significado ecolĂłgico. As espĂ©cies estudadas sĂŁo epĂfitas e suas raĂzes se caracterizam por apresentar velame pluriestratificado, cĂłrtex diferenciado, endoderme e periciclo unisseriados, cilindro vascular poliarco e medula com cĂ©lulas de paredes espessadas. Estruturas anatĂ´micas como: nĂşmero de camadas e tipo de espessamento das paredes das cĂ©lulas do velame, tipo de espessamento de parede da exoderme e endoderme, presença de idioblastos contendo cristais e nĂşmero de pĂłlos de protoxilema agrupam as espĂ©cies nos diferentes gĂŞneros e subfamĂlias. A presença de canais de mucilagem no cĂłrtex de A. castelnavii relatados pela primeira vez na literatura para Bromeliaceae Ă© caráter diagnĂłstico. As raĂzes de Dyckia e Tillandsia apresentam maior nĂşmero de caracteres comuns, representando maior similaridade entre Pitcairnioideae e Tillandsioideae. RaĂzes com velame, exoderme com cĂ©lulas de paredes espessadas constituindo uma camada mecânica, canais de mucilagem, lacunas de ar no cĂłrtex interno e idioblastos com cristais sĂŁo estruturas adaptativas ao hábito epifĂtico.<br>This study aimed to characterize the roots of Bromeliaceae, Aechmea bromeliifolia, A. castelnavii, A. mertensii (Bromelioideae), Dyckia duckei, D. paraensis, D. racemosa (Pitcairnoideae), Tillandsia adpressiflora, T. didistachae and T. paraensis (Tillandsioideae), that occur in Amazonian regions (Mato Grosso-MT), in order to find features of taxonomic value and ecological importance. The studied species are epiphytes and their roots are characterized by a multi-layered velamen, differentiated cortex, uniseriate endodermis and pericycle, polyarch vascular cylinder and medulla with thickened cell walls. Anatomical structures, such as the number of layers and kind of cell wall thickening of the velamen, the kind of thickening of the exodermis and endodermis walls, the presence of idioblasts containing crystals and the number of protoxylem poles help seperate these species within different genera and subfamilies. The presence of mucilage canals in the cortex of A. castelnavii is a diagnostic feature. The roots of Dyckia and Tillandsia share more common features, so there is greater similarity between Pitcairnioideae and Tillandsioideae. Roots with velamen, an exodermis with thickened cell walls constituting a mechanical layer, mucilage canals, air gaps in the inner cortex and idioblasts with crystals are structures adapted to the epiphytic habit