July 14, 2010

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  • False paracarpy in Seemannaralia (Araliaceae)
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    False paracarpy in Seemannaralia (Araliaceae)

    Seemannaralia (Araliaceae) Seemannaralia (Araliaceae) has bilocular ovaries whereas its fruits are unilocular, formed by two adjacent carpels. Oskolski et al. (pp. 29–36) find that the central cavity of these fruits appears by mechanical rupture of the septum by a growing seed. This condition (termed as pseudoparacarpy) has not been reported to date for indehiscent fruits […] More

  • Cordia leucocephala
    in

    Reproductive inter-dependence between a bee and a distylic shrub

    Cordia leucocephala Oligolectic bees and host-plants frequently depend on each other to rear offspring and to set fruit, respectively. Milet-Pinheiro and Schlindwein (pp. 17–27) investigate the close relationship between the bee Ceblurgus longipalpis and the distylic shrub Cordia leucocephala and find a one-to-one reproductive inter-dependence between them, suggesting this is a rare case of monolecty. […] More

  • Photosystem II
    in

    Assembly and repair of photosystem II (Invited Review)

    Considerable attention has been focused on how photosystem II (PSII) is assembled in vivo and how it is repaired following irreversible damage by visible light (so-called photoinhibition). Nixon et al. (pp. 1–16) summarize recent results on the assembly and repair of PSII in cyanobacteria, which are excellent model organisms to study higher plant photosynthesis. A […] More

  • Plants combat plants - cannons
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    Plants combat plants

    Question: when is a cannon not a cannon? Answer: when it’s a ‘high-pressure long-range deodorant spray’(!). For such is the description of the cannons currently being deployed in China to combat the malodorous odours emanating from a Beijing rubbish dump (http://news.bbc.co.uk/1/hi/world/asia-pacific/8639248.stm). Over 100 of the odour-busting devices have been recruited to defend the city’s inhabitants […] More