Results 261 to 270 of about 84,467 (284)
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1993
Abstract Little is known about the nature of cell-cell interactions in plants as many of the most useful methods for studying this problem are difficult, if not impossible, to employ in plants. One of the most significant technical problems is the tendency of plant cells and tissues to dedifferentiate in new environments. As a result,
Mark Dudley, R Scott Poethig
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Abstract Little is known about the nature of cell-cell interactions in plants as many of the most useful methods for studying this problem are difficult, if not impossible, to employ in plants. One of the most significant technical problems is the tendency of plant cells and tissues to dedifferentiate in new environments. As a result,
Mark Dudley, R Scott Poethig
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Oikos, 1995
In clonal organisms the distribution of a genet is potentially unlimited in space and time. Fitness, defined as the rate of change in number of units carrying a certain allele or allele complex, can be calculated using life cycle graph analysis. The units used should be self-replicating, limited in space and time, and not unnecessarily small.
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In clonal organisms the distribution of a genet is potentially unlimited in space and time. Fitness, defined as the rate of change in number of units carrying a certain allele or allele complex, can be calculated using life cycle graph analysis. The units used should be self-replicating, limited in space and time, and not unnecessarily small.
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Transgenerational plasticity in clonal plants
Evolutionary Ecology, 2010Transgenerational plasticity has recently been recognized as a mechanism allowing phenotypic adjustments to local conditions to be passed onto sexually produced offspring. Although thus far it has been studied mainly in non-clonal plants, the present paper proposes that transgenerational plasticity is also applicable to asexually generated progeny, and
Vít Latzel, Jitka Klimešová
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Habitat Selection in a Clonal Plant
Science, 1985Rhizomatous growth may permit the nonrandom placement of ramets into different environments, but whether clonal plants are able to use this means to exercise adaptive habitat choice is not known. Western ragweed (Ambrosia psilostachya) plants are shown to preferentially colonize nonsaline soil over saline soil patches, and clones with the strongest ...
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Ring formation in clonal plants
Community Ecology, 2014Ring shaped patches of clonal plants fascinated plant ecologists since long time. In this work we review the reports on the occurrence of ring pattern in different environmental conditions, the growth forms of ring-forming plants, the mechanisms underlying ring formation, and the consequences for species diversity at community scale. Rings formed by 83
BONANOMI, GIULIANO +5 more
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MODELING INVESTMENTS IN SEEDS, CLONAL OFFSPRING, AND TRANSLOCATION IN A CLONAL PLANT
Ecology, 1999Clonal plants that can switch facultatively between sexual and asexual re- production may respond plastically to the environment. We constructed a dynamic state variable model to examine how the measure of fitness, ramet and genet mortality, and the assimilation rates of a parent and its clonal offspring influence behavioral investments in ramet growth,
Shea N. Gardner, Marc Mangel
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Negative plant soil feedback explaining ring formation in clonal plants
Journal of Theoretical Biology, 2012Ring shaped patches of clonal plants have been reported in different environments, but the mechanisms underlying such pattern formation are still poorly explained. Water depletion in the inner tussocks zone has been proposed as a possible cause, although ring patterns have been also observed in ecosystems without limiting water conditions. In this work,
CARTENI', FABRIZIO +5 more
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Population biology of clonal plants: Foreword to the proceedings from the 7th Clonal Plant Workshop
Evolutionary Ecology, 2004ANNE TOLVANEN*, PIRKKO SIIKAMAKI and PIA MUTIKAINEN Finnish Forest Research Institute, Muhos Research Station, Kirkkosaarentie 7, FI-91500 Muhos, Finland (*author for correspondence, tel.: 358-10-211-3782; fax: 358-10-211-3701; e-mail: anne. tolvanen@metla.fi).
Anne Tolvanen +2 more
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Fitness and evolution in clonal plants: the impact of clonal growth
Evolutionary Ecology, 2001Seeds have often been emphasized in estimates of plant fitness because they are the units that carry genes to the next generation, disperse, and found new populations. We contend that clonal growth also needs to be considered when estimating fitness in clonal plants, regardless of whether fitness is measured from a genet or ramet perspective.
Jean J. Pan, Jason S. Price
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Overestimating Population Sizes of Rare Clonal Plants
Conservation Biology, 2012In the United States, a petition to list a plant taxon under the Endangered Species Act (ESA) includes preliminary information, usually augmented subsequently, on the status of the taxon (U.S. Fish & Wildlife Service 2009a). Plants with narrow geographic extent and few populations and individuals are considered especially vulnerable because population ...
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