Results 71 to 80 of about 5,771 (226)

1166. Helianthus occidentalis Riddell

Curtis's Botanical Magazine, EarlyView.
Summary Helianthus occidentalis Riddell (Compositae: Heliantheae: Helianthinae) is described and illustrated. The species' placement in the genus is commented on, as are the differences in infrageneric placement of the other species Heiser originally grouped H. occidentalis with.
Nicholas Hind, Christabel King
wiley   +1 more source

Flowering biology and structure of floral nectaries in Galanthus nivalis L.

Acta Societatis Botanicorum Poloniae, 2016
In Poland Galanthus nivalis L. is partially protected. The flowers of this species are one of the first sources of nectar and pollen for insects from February to April. The aim of this study was to present the flowering biology as well as the topography,
Elżbieta Weryszko-Chmielewska, Mirosława Chwil   +1 more
doaj   +1 more source

Metabarcoding of Pollen Carried by Syrphids Reveals Novel Plant–Pollinator Interactions in a Protected Natural Area and Agricultural Sites

Entomologia Experimentalis et Applicata, EarlyView.
Using DNA metabarcoding, this study investigates pollen transported by syrphids (Syrphidae) in the Dolomiti Bellunesi National Park and agricultural sites in Northern Italy. The analysis reveals a high diversity of visited plant taxa, including previously undocumented plant–pollinator interactions.
Serena Magagnoli, Daniele Sommaggio, Claudio Ratti, Riccardo Baroncelli, Andrea Menicucci, Enrico Vettorazzo, Giovanni Burgio   +6 more
wiley   +1 more source

Distribution, structural and ecological aspects of the unusual leaf nectaries of Calolisianthus species (Gentianaceae) [PDF]

, 2011
Nectaries in leaves of Gentianaceae have been poorly studied. The present study aims to describe the distribution, anatomy, and ecological aspects of extrafloral nectaries (EFNs) of three Calolisianthusspecies and in particular the ultrastructure of EFNs
Azevedo, Aristéa Alves, Báo, Sônia Nair, Delgado, Marina Neves, Morais, Helena Castanheira, Silva, Luzimar Campos da   +4 more
core   +2 more sources

A Repertoire of Major Genes From Crop Wild Relatives for Breeding Disease‐Resistant Wheat, Rice, Maize, Soybean and Cotton Crops

Plant Breeding, EarlyView.
ABSTRACT Global food demand is predicted to rise anywhere from 59% to 98% by 2050 because of increasing population. However, the continued depletion of natural resources and increasing biotic and abiotic stresses will continue to pose significant threats to global food security in coming years.
Memoona Khalid, Hafiz Mamoon Rehman, Tsz‐Yan Cheung, Shakeel Ahmed, Ting Fung Chan, Hon‐Ming Lam   +5 more
wiley   +1 more source

Comparison of the nectary structure of chosen species from subf. Pomoideae (Rosaceae)

Acta Agrobotanica, 2013
The research of the anatomy of nectaries of six species from Pomoideae was carried out. The observations concerned the flowers longitudinal sections of the following species: Malus silvestris Mill., Pyrus communis L., P.
Elżbieta Weryszko-Chmielewska, Agata Konarska   +1 more
doaj   +1 more source

Cantua dendritica (Polemoniaceae), a New Species from Peru, and Two New Cantua Names [PDF]

, 2008
Cantua dendritica is described as new. This species is apparently restricted to the region around Paucartambo, Department of Cusco, Peru. Related to, and frequently identified as, Cantua flexuosa, this new species differs in its glandular calyx, highly ...
Porter, J. Mark, Prather, L. Alan
core   +3 more sources

The pollination ecology and mouthpart morphology of a pollen‐feeding fly Incurviseta cf. maculifrons (Diptera: Lauxaniidae) in the Australian Alpine

Physiological Entomology, EarlyView.
The Lauxaniid fly Incurviseta cf. maculifrons (Malloch, 1925) is a locally abundant but poorly understood flower visitor in the Australian Alpine. We describe the flower visitation, pollen transport, pollen diet and mouthpart morphology of I. cf. maculifrons using field observations, pollen analyses and scanning electron microscopy. I. cf.
Tomas Mitchell‐Storey, Francisco Encinas‐Viso, Joshua Botti‐Anderson, Joanne M. Bennett   +3 more
wiley   +1 more source

Anatomy and ultrastructure of floral nectaries of Asphodelus aestivus Brot. (Asphodelaceae)

Acta Agrobotanica, 2012
The structure of septal nectaries in Asphodelus aestivus flowers was investigated by using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (EM).
Elżbieta Weryszko-Chmielewska, Thomas Sawidis, Krystyna Piotrowska   +2 more
doaj   +1 more source

The Role of Developmental Genetics in Understanding Homology and Morphological Evolution in Plants [PDF]

, 2007
Homology assessments are critical to comparative biological studies. Although gene expression data have been proposed as instrumental for defining homologous relationships, several lines of evidence suggest that this type of data can be misleading if ...
Jaramillo, M. Alejandra, Kramer, Elena
core   +1 more source