Cacti
Mostrando 1-12 de 31 artigos, teses e dissertações.
-
1. Karyotype characterization and evolution of chromosome number in Cactaceae with special emphasis on subfamily Cactoideae
ABSTRACT Cactaceae species are karyotypically well-known with x = 11 and chromosome number variation due mainly to polyploidization. However, both assumptions are based on descriptive observations without taking an evolutionary framework of Cactaceae into account. Aiming to confirm these hypotheses in an evolutionary context, we obtained chromosome numbers f
Acta Bot. Bras.. Publicado em: 2020-03
-
2. Karyotype characterization and evolution of chromosome number in Cactaceae with special emphasis on subfamily Cactoideae
ABSTRACT Cactaceae species are karyotypically well-known with x = 11 and chromosome number variation due mainly to polyploidization. However, both assumptions are based on descriptive observations without taking an evolutionary framework of Cactaceae into account. Aiming to confirm these hypotheses in an evolutionary context, we obtained chromosome numbers f
Acta Bot. Bras.. Publicado em: 11/11/2019
-
3. Nuevo registro de Melocactus peruvianus (Cactaceae) y estado de conservación del género Melocactus en el Ecuador
Abstract The globular cacti are the group of cacti that are most at risk of extinction in Continental Ecuador. Melocactus bellavistensis, is distributed in a dry inter-Andean valley in the province of Loja and is currently listed in the category of Deficient Data (DD) by the IUCN. The other species, M. peruvianus is known only in two confirmed localities in
Rodriguésia. Publicado em: 11/11/2019
-
4. Ethnobotany of native cacti in the northeast region of Brazil: can traditional use influence availability?
ABSTRACT Documenting the uses of native species of Cactaceae in Northeast Brazil contributes to understanding how the inhabitants of this seasonally dry and low-rainfall region have used these resources, considering that some species of this family of Cactaceae are among the most endangered in the world. The aim of this research was to determine which specie
Acta Bot. Bras.. Publicado em: 01/08/2019
-
5. Cross-genera SSR transferability in cacti revealed by a case study using Cereus (Cereeae, Cactaceae)
Abstract The study of transferability of simple sequence repeats (SSR) among closely related species is a well-known strategy in population genetics, however transferability among distinct genera is less common. We tested cross-genera SSR amplification in the family Cactaceae using a total of 20 heterologous primers previously developed for the genera Arioca
Genet. Mol. Biol.. Publicado em: 21/02/2019
-
6. Biology, Flowering and Fruiting of the Cactus Opuntia spp.: A Review and Some Observations on Three Varieties in Morocco
ABSTRACT The cactus is a succulent plant resistant to droughts. According to the recently reviewed classification, cacti belong to the family of Opuntiaceae Desv. (synon. Cactaceae Juss.) with Opuntia Mill. as the typical genus. This genus is economically the most important in the family, as it includes a group of cactus pear plants which play an important r
Braz. arch. biol. technol.. Publicado em: 21/08/2017
-
7. Patterns of species richness and abundance among cactus communities receiving different rainfall levels in the semiarid region of Brazil
ABSTRACT This study examines the variation in cacti species richness and abundance among sites with different average rainfall and soil types. We assessed a total of 3,660 individuals of six species of Cactaceae: Cereus jamacaru, Melocactus zehntneri, Pilosocereus gounellei, Pilosocereus pachycladus, Tacinga inamoena, and Tacinga palmadora. The greatest spec
Acta Bot. Bras.. Publicado em: 26/10/2016
-
8. Tissue culture of ornamental cacti
Cacti species are plants that are well adapted to growing in arid and semiarid regions where the main problem is water availability. Cacti have developed a series of adaptations to cope with water scarcity, such as reduced leaf surface via morphological modifications including spines, cereous cuticles, extended root systems and stem tissue modifications to i
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-12
-
9. Bactérias associadas às cactáceas da Caatinga: promoção de crescimento de plantas sob estresse hídrico / Cacti-associated bacteria from Caatinga: plant growth promotion under water stress
A Caatinga, bioma exclusivamente brasileiro, inserido no clima semiárido nordestino, apresenta xerófitas com alta resistência aos períodos de seca. Estas plantas associam-se a micro-organismos que também se encontram bem adaptados, desenvolvendo mecanismos de proteção celular contra o estresse hídrico, assim como proteção vegetal contra os efeitos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/10/2012
-
10. Estudo de estrutura genética da espécie de Cactácea colunar Pilosocereus machrisii utilizando DNA microssatélite
Pilosocereus machrisii is a columnar cacti with natural fragmented distribution; restrict to campos rupestres vegetation patches or rocky outcrops on the Cerrado domain; in Central and eastern Brazil. These features makes P. machrisii an appropriate biological model for population genetic studies aiming to gather information on population structure; since sm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/05/2012
-
11. Detection and molecular characterization of cactus witches'-broom disease associated with a group 16SrII phytoplasma in northern areas of China
In July 2010, cacti with typical phytoplasma symptoms were observed in Yangling district, Shaanxi Province, China. Based on amplification of 16S rRNA gene, phytoplasmas were detected by polymerase chain reaction (PCR) driven with universal primer pairs P1/ P7, followed by a nested PCR with universal primer pairs R16F2n/R16R2. Fragments of expected sizes (1.8
Tropical Plant Pathology. Publicado em: 2012-06
-
12. Estrutura e vascularização da região areolar em cactos com folha / Structure and vascularization of the areolar region in leaf cacti
Uma das características marcantes na família Cactaceae A.L. de Jussieu é a presença de aréolas no caule, consideradas ramos altamente reduzidos. A estrutura e o desenvolvimento da região areolar foram temas de vários trabalhos, tendo sido analisados representantes das subfamílias Pereskioideae, Opuntioideae e Cactoideae. De um modo geral, os trabalho
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/2011