Results 51 to 60 of about 8,298,845 (325)

Helping editors choose better seed sets for entity set expansion [PDF]

Proceedings of the 18th ACM conference on Information and knowledge management, 2009
Sets of named entities are used heavily at commercial search engines such as Google, Yahoo and Bing. Acquiring sets of entities typically consists of combining semi-supervised expansion algorithms with manual cleaning of the resulting expanded sets.
Vishnu Vyas, Patrick Pantel, Eric Crestan   +2 more
openaire   +1 more source

Effect of Pollen Limitation and Pollinator Visitation on Pollination Success of Haloxylon ammodendron (C. A. Mey.) Bunge in Fragmented Habitats

Frontiers in Plant Science, 2019
Haloxylon ammodendron (C. A. Mey.) Bunge is an ecologically important species in arid regions. Pollen limitation may decrease plant reproduction due to low levels of pollen transfer and inadequate pollen receipt.
Min Chen, Xiao-An Zuo
doaj   +1 more source

When less is more: Visitation by generalist pollinators can have neutral or negative effects on plant reproduction

Frontiers in Ecology and Evolution, 2022
Selection for specialized coevolutionary relationships can arise if generalized opportunistic pollinators, while still delivering some pollen, operate as less effective pollen delivery agents.
Cole Burns, Soraya Villalobos, Jana C. Vamosi   +2 more
doaj   +1 more source

Promising and Failed Breeding Techniques for Overcoming Sterility and Increasing Seed Set in Bananas (Musa spp.)

Horticulturae
Most banana improvement programs are restricted to using a sub-set of edible landraces for sexual hybridization as the majority are female sterile. This results from an array of factors that work in tandem and lead to sterility. Use of pollen germination
Allan Waniale, Settumba B. Mukasa, Arthur K. Tugume, Alex Barekye, Robooni Tumuhimbise   +4 more
doaj   +1 more source

Direct and Indirect Effects of Overstory Canopy and Sex-Biased Density Dependence on Reproduction in the Dioecious Shrub Shepherdia canadensis (Elaeagnaceae)

Diversity, 2020
This study assessed the reproductive success of a temperate dioecious shrub, Canada buffaloberry, Shepherdia canadensis (L.) Nutt., in central Alberta, Canada, by examining the effects of spatial patterns and overstory canopy on flower and fruit ...
Tyler J. Bateman, Scott E. Nielsen
doaj   +1 more source

Reproductive success through high pollinator visitation rates despite self incompatibility in an endangered wallflower [PDF]

, 2016
PREMISE OF THE STUDY: Self incompatibility (SI) in rare plants presents a unique challenge—SI protects plants from inbreeding depression, but requires a sufficient number of mates and xenogamous pollination. Does SI persist in an endangered polyploid? Is
Herman, Julie A., Lucas, Jessica, Melen, Miranda K., O’Malley, Rachel E., Parker, Ingrid M., Thom, Aaron M., Whittall, Justen B.   +6 more
core   +2 more sources

Minimizing seed set selection with probabilistic coverage guarantee in a social network [PDF]

Knowledge Discovery and Data Mining, 2014
A topic propagating in a social network reaches its tipping point if the number of users discussing it in the network exceeds a critical threshold such that a wide cascade on the topic is likely to occur.
P. Zhang, Wei Chen, Xiaoming Sun, Yajun Wang, Jialin Zhang   +4 more
semanticscholar   +1 more source

The DAG1 transcription factor negatively regulates the seed-to-seedling transition in Arabidopsis acting on ABA and GA levels [PDF]

, 2016
BACKGROUND: In seeds, the transition from dormancy to germination is regulated by abscisic acid (ABA) and gibberellins (GAs), and involves chromatin remodelling.
Boccaccini, Alessandra, Costantino, Paolo, Frey, A, Lorrai, Riccardo, Marion Poll, A, Mercey Boutet, S, Ruta, Veronica, Strnad, M, Tarkowská, D, Vittorioso, Paola   +9 more
core   +4 more sources

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

Acta Societatis Botanicorum Poloniae, 2015
In Poland, like in other parts of Central Europe, dry grasslands significantly contribute to the biodiversity of both fauna and flora. Anthropogenic pressure impair many species of xerothermic habitats, and several populations face an increased risk of ...
Bożena Denisow, Małgorzata Wrzesień
doaj   +1 more source

Linking plant specialization to dependence in interactions for seed set in pollination networks. [PDF]

PLoS One, 2013
Studies on pollination networks have provided valuable information on the number, frequency, distribution and identity of interactions between plants and pollinators.
Tur C, Castro-Urgal R, Traveset A.
europepmc   +2 more sources