نتایج جستجو برای: day to pollination

تعداد نتایج: 10647281  

Journal: :Pediatric Research 1985

Journal: :Proceedings. Biological sciences 2007
Alexandra-Maria Klein Bernard E Vaissière James H Cane Ingolf Steffan-Dewenter Saul A Cunningham Claire Kremen Teja Tscharntke

The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is...

2014
Biao Jin Yan Lu Xiao Xue Jiang Min Zhang Lei Zhang

The orientation and morphology of the female cone are important for wind pollination in gymnosperms. To examine the role of female reproductive structures associated with wind pollination in Ginkgo biloba, we used scanning electron microscopy and semithin section techniques to observe the development of female short shoots and ovules in G. biloba before and during the pollination period. The ov...

Journal: :Bulletin of the Royal College of Psychiatrists 1980

Journal: :Proceedings. Biological sciences 2013
Ola Lundin Henrik G Smith Maj Rundlöf Riccardo Bommarco

Pollination is a key ecosystem service which most often has been studied in isolation although effects of pollination on seed set might depend on, and interact with, other services important for crop production. We tested three competing hypotheses on how insect pollination and pest control might jointly affect seed set: independent, compensatory or synergistic effects. For this, we performed a...

Journal: :Annals of botany 2009
Jannice Friedman Spencer C H Barrett

BACKGROUND The rich literature that characterizes the field of pollination biology has focused largely on animal-pollinated plants. At least 10 % of angiosperms are wind pollinated, and this mode of pollination has evolved on multiple occasions among unrelated lineages, and hence this discrepancy in research interest is surprising. Here, the evolution and functional ecology of pollination and m...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
Timothy H Keitt

Parallel declines of wild pollinators and pollinator-dependent plants have raised alarms over the loss of pollination services in agroecosystems. A spatially explicit approach is needed to develop specific recommendations regarding the design of agricultural landscapes to sustain wild pollinator communities and the services they provide. I modeled pollination services in agroecosystems using a ...

Journal: :Atmospheric Environment 2021

Long-term trends of atmospheric Quercus pollen recorded for 25 years (1995–2019) in southern Spain (Cordoba city, Andalusia region) have been studied to determine the influence climate fluctuations and other anthropogenic factors on Mediterranean oak vegetation areas. Atmospheric analysis revealed different changes reproductive phenology through study period. Pollination intensity showed an ave...

Journal: :Journal of Applied Entomology 2022

Pollinating insects provide pollination services to many crop species, including sweet cherry (Prunus avium L.), and this can be delivered by both managed wild pollinators. Managed pollinators are often used pollinate a range of fruit crops, but increasingly the role is being studied. However, importance pollinator species depends on their relative abundance effectiveness, which foraging activi...

Journal: :Annals of botany 2010
Mackenzie L Taylor Terry D Macfarlane Joseph H Williams

BACKGROUND AND AIMS Trithuria, the sole genus in the family Hydatellaceae, is an important group for understanding early angiosperm evolution because of its sister relationship to the ancient lineage, Nymphaeales (water lilies). Although also aquatic, Trithuria differs from water lilies in that all species are extremely small, and most have an annual life form and grow in seasonal wetlands. Ver...

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