More stories

  • Forest strips defoliated by an insect pest
    in

    Growing after attack: what predicts tree responses to herbivores?

    Trees can face significant threats from herbivores, particularly ones that defoliate (i.e. eat leaves and reduce leaf area). After being attacked by defoliators, trees can respond by changing their growth patterns and producing defence chemicals. In extreme cases, trees are unable to mount an effective response to defoliation, killing the tree. On a forest-wide scale, […] More

  • Saussurea nigrescens
    in

    Global warming may reduce plant nectar yield

    Although flower nectar yield is well known to be temperature dependent, the effects of climate change on the availability of nectar to pollinators have rarely been studied. Asymmetric warming is one of the distinguishing features of global climate change, in which winter and night-time temperatures are predicted to increase more than summer and diurnal temperatures. […] More

  • Post-harvest transcriptional changes in onion
    in

    Post-harvest transcriptional changes in onion

    During the transition from endo- to eco-dormancy and subsequent growth, the bulb of onion (Allium cepa) changes from a sink organ to a source, but the mechanisms controlling these processes are not fully understood. Chope et al. carry out detailed analysis of whole-bulb physiology, biochemistry and transcriptional changes in response to sprouting and provide evidence that […] More

  • Growth and carbon budgets in Nothofagus
    in

    Growth and carbon budgets in Nothofagus

    Growth decline with age in trees is hypothesized to be an effect of carbon limitation. By assessing carbon reserves and isotopes at different ontogenetic stages in the deciduous broadleaf tree Nothofagus pumilio (lenga beech) in two forests in southern Chile,  Piper and Fajardo test this hypothesis and find that carbon reserves do not vary with tree […] More