Search Constraints
Search Results
-
Journal article
Convergent origin of the narrowly lanceolate leaf in the genus Aster-with special reference to an unexpected discovery of a new Aster species from East China
Narrowly lanceolate leaves occur frequently in the genus Aster. It was often employed as a distinguishing character in the taxonomy of this genus. The origin of this particular leaf shape, however, has never been investigated using comparative methods. In this study, we reconstructed a comprehensive phylogeny that includes most species...Zhang, G ; Hu, H ; Gao, T ; Gilbert, M ; Jin, X
-
Conference paper (published)
Cryobiotechnology for the long-term preservation of oak (Quercus sp.) genetic resources.
Oaks (genus Quercus) are dominant and iconic trees in most European, American, Asian and North African forests, from cool temperate to tropical environments. There are at least 600 species of Quercus globally with high ecological and economical importance. However, 45% of the species evaluated by IUCN are considered threatened, being...Ballesteros, D. ; Nebot, A. ; Pritchard, H.
Quercus, Cryopreservation, Axes, Genetic resources, Pollen, Seeds, In vitro culture, and Embryos
-
Journal article
Detection of seasonal variation in Aloe polysaccharides using carbohydrate detecting microarrays
Aloe vera gel is a globally popular natural product used for the treatment of skin conditions. Its useful properties are attributed to the presence of bioactive polysaccharides. Nearly 25% of the 600 species in the genus Aloe are used locally in traditional medicine, indicating that the bioactive components in Aloe...Ahl, Louise ; Al-Husseini, Narjes ; Al-Helle, Sara ; Staerk, Dan ; Grace, Olwen …
-
Journal article
Conservation of the threatened species Pulsatilla vulgaris Mill. (pasqueflower) is aided by reproductive system and polyploidy
Population loss due to habitat disturbance is a major concern in biodiversity conservation. Here we investigate the genetic causes of the demographic decline observed in English populations of P ulsatilla vulgaris and the consequences for conservation. Using ten nuclear microsatellite markers, we compare genetic variation in wild populations with restored... -
Journal article
Crosslandia setifolia is a partly monoecious species of Fimbristylis (Abildgaardieae: Cyperaceae)
While the limits of Fimbristylis Vahl (1805: 285) are contentious (Goetghebeur & Coudijzer 1984, Gordon-Gray 1971, Lye 1971, 1973), particularly with regard to the inclusion of Abildgaardia Vahl (1805: 296) within Fimbristylis , all current data support the derivation of Crosslandia W.Fitzg. (1906: 9) from within Fimbristylis (Ghamkhar et al....Roalson, Eric ; Barrett, Russell ; Wilson, Karen ; Bruhl, Jeremy ; Larridon, Isabel
-
Journal article
Contributions to the knowledge of Cambodian Cyperaceae
To date, there are very few sequence data for Cyperaceae from mainland Southeast Asia. The aim of the present study was to contribute nuclear ribosomal internal transcribed spacer (ITS) sequences of selected species of Cambodian Cyperaceae to the overall phylogeny of the family. We generated ITS sequences of 38 accessions...Tremetsberger, K ; Hameister, S ; Simpson, D ; Bernhardt, K
-
Journal article
Coenocytic growth phases in land plant development: a paleo-evo-devo perspective
Premise of research.?The evolutionary origin of the seed habit coincided with profound physiological and structural changes associated with underlying developmental patterns. A coenocyte is formed during megagametophyte development in many vascular plants, including some lycophytes and all spermatophytes; this structure compares closely with similar free-nuclear growth phases during embryo development...Rudall, Paula ; Bateman, Richard
-
-
Journal article
Chemistry of floral rewards: intra- and interspecific variability of nectar and pollen secondary metabolites across taxa
Floral chemistry mediates plant interactions with pollinators, pathogens, and herbivores, with major consequences for fitness of both plants and flower visitors. The outcome of such interactions often depends on compound dose and chemical context. However, chemical diversity and intraspecific variation of nectar and pollen secondary chemistry are known for very... -
Journal article
Compendium of Freziera (Pentaphylacaceae) of South America including eleven new species and the typification of 22 names
As part of a revision of neotropical Freziera (Pentaphylacaceae) we provide a compendium of the 63 species we recognise for South America including the description, illustration and extinction threat assessment of 11 new species, typification of 22 names and a new combination for Freziera rufescens (Kobuski) D. Santam. & A....Santamaría-Aguilar, Daniel ; Monro, Alexandre