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  • 1
    Online Resource
    Online Resource
    Wiley ; 2020
    In:  Crop, Forage & Turfgrass Management Vol. 6, No. 1 ( 2020-01)
    In: Crop, Forage & Turfgrass Management, Wiley, Vol. 6, No. 1 ( 2020-01)
    Abstract: Research was conducted to determine the extent of herbicide resistance in annual bluegrass ( Poa annua L.) randomly collected from Tennessee golf courses during 2018. Harvested plants were cultured for seed collection, with progeny screened for resistance to glyphosate (Roundup Pro; 32 fl oz acre −1 ), foramsulfuron (Revolver; 17.4 fl oz acre −1 ), simazine (Princep 4FL; 2 qt acre −1 ), or prodiamine (Barricade 65WG; 0.001 mM). In postemergence herbicide screens, annual bluegrass collections were grouped based on survival percentage: resistant ( 〉 30% survival), segregating for resistance (5–30% survival), or susceptible ( 〈 5% survival). For prodiamine, annual bluegrass collections were screened in hydroponics and deemed resistant when  〈 20% of plants exhibited symptoms of herbicide treatment (e.g., club roots), whereas those with  〉 90% of plants showing symptoms were deemed susceptible; the remainder were intermediate and classified as segregating for resistance. In total, 64% of the annual bluegrass collections had some degree of resistance to glyphosate. Similarly, 21% had some degree of resistance to foramsulfuron, while 58% of annual bluegrass collections had some degree of resistance to prodiamine. Only 3% of the annual bluegrass collections were susceptible to simazine, and 25% of those surviving treatment were resistant to glyphosate or foramsulfuron. Multiple resistance to glyphosate, foramsulfuron, and simazine was reported in 4% of the annual bluegrass collections. The results of this research highlight the need for more diversified weed management strategies to control annual bluegrass on Tennessee golf courses.
    Type of Medium: Online Resource
    ISSN: 2374-3832 , 2374-3832
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2806280-2
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  • 2
    In: Global Ecology and Biogeography, Wiley, Vol. 30, No. 9 ( 2021-09), p. 1740-1764
    Abstract: Assessing biodiversity status and trends in plant communities is critical for understanding, quantifying and predicting the effects of global change on ecosystems. Vegetation plots record the occurrence or abundance of all plant species co‐occurring within delimited local areas. This allows species absences to be inferred, information seldom provided by existing global plant datasets. Although many vegetation plots have been recorded, most are not available to the global research community. A recent initiative, called ‘sPlot’, compiled the first global vegetation plot database, and continues to grow and curate it. The sPlot database, however, is extremely unbalanced spatially and environmentally, and is not open‐access. Here, we address both these issues by (a) resampling the vegetation plots using several environmental variables as sampling strata and (b) securing permission from data holders of 105 local‐to‐regional datasets to openly release data. We thus present sPlotOpen, the largest open‐access dataset of vegetation plots ever released. sPlotOpen can be used to explore global diversity at the plant community level, as ground truth data in remote sensing applications, or as a baseline for biodiversity monitoring. Main types of variable contained Vegetation plots ( n  = 95,104) recording cover or abundance of naturally co‐occurring vascular plant species within delimited areas. sPlotOpen contains three partially overlapping resampled datasets ( c . 50,000 plots each), to be used as replicates in global analyses. Besides geographical location, date, plot size, biome, elevation, slope, aspect, vegetation type, naturalness, coverage of various vegetation layers, and source dataset, plot‐level data also include community‐weighted means and variances of 18 plant functional traits from the TRY Plant Trait Database. Spatial location and grain Global, 0.01–40,000 m². Time period and grain 1888–2015, recording dates. Major taxa and level of measurement 42,677 vascular plant taxa, plot‐level records. Software format Three main matrices (.csv), relationally linked.
    Type of Medium: Online Resource
    ISSN: 1466-822X , 1466-8238
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1479787-2
    detail.hit.zdb_id: 2021283-5
    SSG: 12
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  • 3
    In: Global Change Biology, Wiley, Vol. 28, No. 22 ( 2022-11), p. 6696-6710
    Abstract: Fungi are highly diverse organisms, which provide multiple ecosystem services. However, compared with charismatic animals and plants, the distribution patterns and conservation needs of fungi have been little explored. Here, we examined endemicity patterns, global change vulnerability and conservation priority areas for functional groups of soil fungi based on six global surveys using a high‐resolution, long‐read metabarcoding approach. We found that the endemicity of all fungi and most functional groups peaks in tropical habitats, including Amazonia, Yucatan, West‐Central Africa, Sri Lanka, and New Caledonia, with a negligible island effect compared with plants and animals. We also found that fungi are predominantly vulnerable to drought, heat and land‐cover change, particularly in dry tropical regions with high human population density. Fungal conservation areas of highest priority include herbaceous wetlands, tropical forests, and woodlands. We stress that more attention should be focused on the conservation of fungi, especially root symbiotic arbuscular mycorrhizal and ectomycorrhizal fungi in tropical regions as well as unicellular early‐diverging groups and macrofungi in general. Given the low overlap between the endemicity of fungi and macroorganisms, but high conservation needs in both groups, detailed analyses on distribution and conservation requirements are warranted for other microorganisms and soil organisms.
    Type of Medium: Online Resource
    ISSN: 1354-1013 , 1365-2486
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020313-5
    SSG: 12
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  • 4
    In: The Journal of Physiology, Wiley, Vol. 550, No. 2 ( 2003-07), p. 365-372
    Abstract: Cardiac inward rectifier K + currents ( I K1 ) play an important role in maintaining resting membrane potential and contribute to late phase repolarization. Members of the K ir2.x channel family appear to encode for I K1 . The purpose of this study was to determine the molecular composition of cardiac I K1 in rabbit ventricle. Western blots revealed that K ir2.1 and K ir2.2 , but not K ir2.3 , are expressed in rabbit ventricle. Culturing rabbit myocytes resulted in a ∼50 % reduction of I K1 density after 48 or 72 h in culture which was associated with an 80 % reduction in K ir2.1 , but no change in K ir2.2 , protein expression. Dominant‐negative (DN) constructs of K ir2.1 , K ir2.2 and K ir2.3 were generated and tested in tsA201 cells. Adenovirus‐mediated over‐expression of K ir2.1dn , K ir2.2dn or K ir2.1dn plus K ir2.2dn in cultured rabbit ventricular myocytes reduced I K1 density equally by 70 % 72 h post‐infection, while AdK ir2.3dn had no effect, compared to green fluorescent protein (GFP)‐infected myocytes. Previous studies indicate that the [Ba 2+ ] required for half‐maximum block (IC 50 ) differs significantly between K ir2.1 , K ir2.2 and K ir2.3 channels. The dependence of I K1 on [Ba 2+ ] revealed a single binding isotherm which did not change with time in culture. The IC 50 for block of I K1 was also unaffected by expression of the different DN genes after 72 h in culture. Taken together, these results demonstrate functional expression of K ir2.1 and K ir2.2 in rabbit ventricular myocytes and suggest that macroscopic I K1 is predominantly composed of K ir2.1 and K ir2.2 heterotetramers.
    Type of Medium: Online Resource
    ISSN: 0022-3751 , 1469-7793
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2003
    detail.hit.zdb_id: 1475290-6
    SSG: 12
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