Results 251 to 260 of about 2,221,299 (300)
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EXPANDING THE LIMITS OF THE POLLEN-LIMITATION CONCEPT: EFFECTS OF POLLEN QUANTITY AND QUALITY
Ecology, 2007Pollination commonly limits seed production, as addition of pollen to stigmas often increases fecundity. This response is usually interpreted as evidence that plants' stigmas receive too few pollen grains to maximize ovule fertilization (quantity limitation); however, many genetic studies demonstrate that poor-quality pollen can also reduce seed ...
Marcelo A, Aizen, Lawrence D, Harder
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Restoration Ecology, 2020
Restoration is used to conserve biodiversity; however, it is unclear to what extent restoration impacts ecosystem functions. Pollination is an ecosystem function that is critical to plant reproduction and thus restoration success.
Alan D. Ritchie +2 more
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Restoration is used to conserve biodiversity; however, it is unclear to what extent restoration impacts ecosystem functions. Pollination is an ecosystem function that is critical to plant reproduction and thus restoration success.
Alan D. Ritchie +2 more
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Pollen Limitation and the Evolution of Androdioecy from Dioecy
The American Naturalist, 2004Androdioecy is an unusual breeding system in which populations consist of separate male and hermaphrodite individuals. The evolution of androdioecy is still poorly understood; however, there is evidence from several androdioecious species that the breeding system may have evolved from dioecy (males and females).
Diana E, Wolf, Naoki, Takebayashi
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Pollen limitation and pollinator preferences in Scorzonera hispanica
Plant Biology, 2014AbstractThe plant life cycle is often affected by animal–plant interactions. In insect‐pollinated plants, interaction with pollinators is very important. When pollen transfer due to a lower abundance of pollinators limits seed production, selection pressures on plant traits related to plant attraction to pollinators might occur, e.g.
Z, Červenková, Z, Münzbergová
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Pollen limitation of reproductive effort in willows
Oecologia, 1992Pollen limitation of seed set differs from resource limitation in its implications for the evolution of floral traits. Willow flowers attract insects, but also abundantly produce wind-dispersed pollen. I demonstrated pollen limitation in single branches bearing 2-4 inflorescences (catkins) in a field experiment with five species by artificially ...
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Indicators of Pollinator Decline and Pollen Limitation
2014Pollination is a crucial process for maintaining plant reproduction, and is responsible to the yield of about two third of the world’s crops. In recent years, there are growing concerns over pollinator declines and global pollination crisis. A decrease in pollinator populations also affects plants’ reproductive success, and alters the composition of ...
Yuval Sapir +2 more
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Pollen Limitation of Plant Reproduction: Pattern and Process
Annual Review of Ecology, Evolution, and Systematics, 2005▪ Abstract Quantifying the extent to which seed production is limited by the availability of pollen has been an area of intensive empirical study over the past few decades. Whereas theory predicts that pollen augmentation should not increase seed production, numerous empirical studies report significant and strong pollen limitation.
Tiffany M. Knight +9 more
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American Naturalist, 2019
Pollen limitation, when inadequate pollen receipt results in a plant setting fewer seeds and fruits, can reduce plant reproductive success and promote the evolution of self-fertilization as a mechanism of reproductive assurance.
Qiaoqiao Huang, M. Burd
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Pollen limitation, when inadequate pollen receipt results in a plant setting fewer seeds and fruits, can reduce plant reproductive success and promote the evolution of self-fertilization as a mechanism of reproductive assurance.
Qiaoqiao Huang, M. Burd
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Oecologia, 1991
Fruiting and seed set in two bumblebee-pollinated herbs, Melampyrum pratense L. (annual, Scrophulariaceae) and Viscaria vulgaris Bernh. (perennial, Caryophyllaceae) were studied on a dry meadow in southwestern Sweden in June 1986 and 1988. Both species produced seeds by self-fertilization.
Manja M, Kwak, Ola, Jennersten
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Fruiting and seed set in two bumblebee-pollinated herbs, Melampyrum pratense L. (annual, Scrophulariaceae) and Viscaria vulgaris Bernh. (perennial, Caryophyllaceae) were studied on a dry meadow in southwestern Sweden in June 1986 and 1988. Both species produced seeds by self-fertilization.
Manja M, Kwak, Ola, Jennersten
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Pollen Limitation in a Monocarpic Species, Ipomopsis Aggregata
The Journal of Ecology, 1985(1) We tested whether seed production in the perennial monocarpic plant Ipomopsis aggregata (Polemoniaceae) was pollen-limited by adding outcross pollen to open stigmas of plants on three occasions at weekly intervals. We compared fruit set and seed set per fruit with a set of adjacent, untreated plants of the same average height and flower number. (2)
F. Reed Hainsworth +2 more
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