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  • Seedlings
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    The maize lil1 gene is involved in plant growth and drought response

    The brassinosteroids hormones are involved in plant development and plant–environment interactions. In this work, Castorina et al. performed a detailed analysis of lilliputian1-1 (lil1-1), a mutant impaired in the last steps of the brassinosteroid pathway. Lack of brassinosteroid active molecules causes a drastic reduction in seedling elongation, affects root gravitropic curvature and alters cell density […] More

  • Prosopis tamarugo seed collection area
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    Physiological variation of Prosopis species under drought conditions

    Actions aimed at reforesting arid areas around the world are becoming increasingly complex. In a recent study published in AoB PLANTS, Carevic et al. evaluated the physiological resistance to drought stress of Prosopis (mesquite) seedlings from different collection sites in the Atacama Desert, northern Chile. Their results show that seedlings from the most hyperarid habitats […] More

  • Pinus sylvestris
    in

    Could drought stress in trees affect air quality?

    With climate change, trees will experience an increased frequency of stress events (i.e. drought, heat stress) causing both direct effects (e.g. CO2 uptake through photosynthesis) and indirect effects (e.g. isoprenoid emissions) on atmospheric chemistry. Stress effects on photosynthesis are relatively well-studied when compared to plant isoprenoid emissions. Isoprenoids are carbon-rich compounds, and many tree species, […] More

  • Lone Juniper in a Drought
    in ,

    Some trees might have adapted to cope with embolisms instead of preventing them

    Drought is expected to increase in frequency and duration throughout the 21st century. However, it remains unclear how vegetation will respond to drought because the underlying physiological mechanisms are not well understood. During drought, hydraulic dysfunction may occur due to the formation of embolism or a gas-filled bubble that blocks the water transport pathway. It […] More

  • Parental environment and seed response to karrikinolide
    in

    Parental environment and seed response to karrikinolide

    Seeds from different populations of the same species often show distinct germination responses to the smoke-derived chemical karrikinolide (KAR1), thus limiting its potential for use in weed management. Gorecki et al. study the effect of the environment during seed development (i.e. the parental envioronment) on the KAR1-response of seeds from different populations of Brassica tournefortii and […] More

  • Functional plasticity in the hydraulic system
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    Functional plasticity in the hydraulic system

    Functional plasticity in a plant’s hydraulic architecture may constitute a mechanistic basis for anticipating the differential success of plant species in response to climate variability. von Arx et al. compare several lifetime functional traits in the root xylem of the long-lived perennial herb Potentilla diversifolia (Rosaceae) growing in a 14-year water supplement experiment, and find that […] More