May 2017

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  • Mean seed set (± s.e.) of Salvia przewalskii under four different pollination treatments: open pollination, outcrossing, selfing and bagged.
    in

    Robbed, yet replenished: nectar, pollination and reproduction in an alpine plant

    Plant-robber-pollinator interactions are studied in an alpine plant, Salvia przewalskii, that is pollinated by long-tongued Bombus religiosus and short-tongued B. friseanus, and robbed by B. friseanus. Ye et al. find that neither fruit set nor seed set were significantly affected by nectar robbing, and furthermore that nectar replenishment does not differ between flowers that are […] More

  • Eucalyptus globulus
    in

    Responses of Eucalyptus globulus to eleven levels of continuous water availability

    Foliar concentrations of plant secondary metabolites (PSMs) are influenced by soil water availability. However, concentrations of individual compounds in previously published studies have been reported to be higher, lower or to remain stable during water deficit. McKiernan et al. use multiple levels of continuous water deficit to test the effect on plant stress levels, growth […] More

  • Drosophyllum lusitanicum
    in

    Insect prey feeding strategies of a deep rooting dry-soil carnivorous plant

    Nutrition of carnivorous plants has rarely been studied in dry-soil species with long, deep roots, with the focus hitherto on shallow-rooted genera from boggy soils. Paniw et al. assess the role of leaf (via fly feeding) and root (via soil fertilizer) nutrient uptake in growth promotion of Drosophyllum lusitanicum. Insect feeding significantly promotes growth, with […] More

  • Schematic representation of a stomatal complex.
    in

    Stomatal cell wall composition: distinct structural patterns in different phylogenetic groups

    Stomata are pores regulating gas exchange in land plants. Stomatal morphology has remained largely consistent through ∼400 million years of plant evolution, though cell wall composition has changed. Shtein et al. investigate stomatal cell wall composition within a broad evolutionary spectrum of plants, including ferns, angiosperms and grasses. The data demonstrate distinct cell wall patterns […] More

  • Example of a tree ring split into ten sectors (A) and representation of the anatomical features measured on each single tracheid (B).
    in

    Tree-ring anatomy reveals climatic influence on xylem morphogenesis

    During the growing season, the cambium of conifer trees produces successive rows of xylem cells, known as tracheids. Current knowledge on this process mainly stems from xylogenesis monitoring spanning a few years. In this investigation of the effects of long-term inter-annual climate variability on tracheid formation and wall thickening, Castagneri et al. retrospectively study tree-ring […] More

  • Box-and-whisker diagram for the proportion of ovules with autonomous endosperm in populations from various crosses.
    in

    Genetic makeup of autonomous endosperm in Hieracium

    Apomixis (asexual seed formation) generates clonal plants with a maternal genotype. Apomictic Hieracium subgenus Pilosella species mitotically form female gametes, with the seed’s embryo and endosperm developing autonomously (without fertilisation). Henderson et al. examine expression of the dominant autonomous endosperm (AutE) trait in progeny of crosses characterised by female gametes forming mitotically or sexually via […] More

  • in

    The Final Day of #BotanyLive

    Once again all times are UTC. PDT (Los Angeles, Vancouver) = UTC -7 MDT (Denver, Edmonton) = UTC -6 CDT (Chicago, Winnipeg) = UTC -5 EDT (New York, Montréal) = UTC -4 ADT/BRT (Halifax, Brasília) = UTC -3 BST/WEST (UK, Portugal) = UTC +1 CEST (France, Italy) = UTC +2 IST (India) = UTC +5h30m […] More

  • BotanyLive
    in

    Friday on #BotanyLive

    Yesterday caught me by surprise. Keyhole.co is reporting over eight hundred thousand accounts have been exposed to the #BotanyLive tag. Before we get carried away, I don’t think anyone sees everything in their Twitter stream, but we know there’s certainly an audience of thousands. How do we know? Herbarium curators Rachel and Donna are going […] More

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