322 research outputs found

    02. Humor and the Good Life

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    I don’t remember how it started, but somehow throughout my career at Cal Poly Pomona, Dick regularly asked me what colors I wanted. Then, a few days later, he would leave a bag of bearded iris rhizomes in our department office for me. Evidently, Dick was obsessed with breeding these plants, and his breeding program generated many “rejects,” which he shared with his friends and colleagues. My garden was full of his beautiful rejects, and I soon learned to appreciate these plants, which I think was Dick’s true aim. [excerpt

    Evolutionary biology studies on the Iris pumila clonal plant: Advantages of a good model system, main findings and directions for further research

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    Evolutionary studies on the dwarf bearded iris, Iris pumila L., a perennial clonal monocot with hermaphroditic enthomophylous flowers, have been conducted during the last three decades on plants and populations from the Deliblato Sands in Serbia. In this review we discuss the main advantages of this model system that have enabled various studies of several important genetic, ecological, and evolutionary issues at different levels of biological organization (molecular, physiological, anatomical, morphological and population). Based on published research and its resonance in international scientific literature, we present the main findings obtained from these studies, and discuss possible directions for further research

    Two New and Unusual Iris Hybrids

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    Host Specialization In The Rust Of Iris, Puccinia Iridis

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    Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141130/1/ajb208927.pd

    Perennial Flowers

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    PDF pages: 3

    Radial and Bilateral Fluctuating Asymmetry of Iris pumila Flowers as Indicators of Environmental Stress

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    In this study we compared the biomonitoring potential of various types of flower asymmetry indices in Iris pumila (Dwarf Bearded Iris). We chose 197 naturally growing clones from the arid steppe habitat in the largest sandy area in Europe (Deliblato Sands Nature Reserve), and we transplanted two replicates of each clone to a polluted highway site with a heavy traffic flow. After a period of acclimatization, lower levels of photosynthetic pigment concentrations and higher stomatal density and specific leaf area in transplants verified that the chosen highway site was indeed more stressful and therefore suitable for estimation of the flower asymmetry biomonitoring potential. We analyzed radially and bilaterally symmetrical flower structures (radial fluctuating asymmetry (RA) and bilateral fluctuating asymmetry (FA)) on three perianth parts—falls, standards, and styles—and calculated various asymmetry indices based on linear and geometric morphometrics. Despite utilizing a heavily polluted environment and fairly large sample sizes, only one asymmetry index was significantly higher on the polluted site with demonstrated stressful effects on utilized plants, indicating that flower asymmetry was not an efficient method for biomonitoring in the case of I. pumila RA and FA indices

    About Perennials

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    PDF pages: 3
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