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Studies have indicated that plant stomatal conductance (gs) decreases in response to elevated atmospheric CO2, a phenomenon of significance for the global hydrological cycle. However, gs increases across certain CO2 ranges have been predicted by optimization models. The aim of this work by Purcell et al. was to demonstrate that under certain environmental conditions, gs […] More
![Reconstructions of Arabica coffee plants cultivated under elevated (e[CO2], in A) and actual (a[CO2], in B)](https://www.botany.one/wp-content/uploads/2018/05/mcy011-364x205.jpg)
Air [CO2] tends to increase due to climate changes, affecting plant growth. Field-grown Coffea arabica trees were grown under actual and elevated [CO2] for four years. Rakocevic et al. find that elevated [CO2] stimulated stomatal conductance and whole-plant photosynthesis, increasing water-use efficiency during the fourth dry period. Elevated [CO2] reduced leaf area and carbon investment in 2nd order branches, but also […] More
Maize and wheat are globally important food crops. The two species can be grown as an intercrop, with substantial land sparing in the order of 20%, as expressed by a land equivalent ratio of approximately 1.2. In a recent study published in AoB PLANTS, Gou et al. measured the nutrient uptake and photosynthesis rate of […] More
Quantifying the response of plant water status to environmental conditions and its effect on carbon acquisition are essential for simulating plant growth and fruit composition, especially in the context of climate change. Zhu et al. present GrapevineXL, a functional-structural grapevine model that couples the dynamics of water transport from soil to leaf with gas exchange […] More
Why did Gingko almost disappear during the Triassic–Jurassic mass extinction when ferns did so well? The answer has relevance for future atmospheric changes. More
Soil water availability is an important mechanism filtering plant species. Twenty-five herbaceous dicot species were grown under controlled conditions in order to measure a suite of physiological traits associated with a plant’s water economy. Belluau and Shipley identify five traits related to gas exchange that define the ability to acquire resources (when water is not […] More
Plants grow in a variable environment. While the effects of various environmental factors such as CO2 concentration, temperature, air humidity, and blue light on steady-state photosynthesis have been well documented, there has been less focus on the effects of these factors on photosynthesis in fluctuating light. Kaiser et al. reveal that these factors influence photosynthetic […] More
Climate change is expected to bring warmer temperatures and more variable precipitation patterns worldwide, patterns that will depend on the ability of the world’s flora to take up carbon under these new conditions. In a recent study published in AoB PLANTS, Smith et al. subjected deciduous tree seedlings growing in an old-field ecosystem in Massachusetts, […] More
Selected Eucalyptus globulus clones can grow to a height of up to 14m in 3 years, receiving an average rainfall of 630 mm year–1 with a 4-month summer drought. Working with plants under a year old from five clones, Hernández et al. found that xylem sap pH decreased as water potential and stomatal conductance decreased under […] More
Modern clubmosses (Lycophytes) are a vestige of their gargantuan carboniferous ancestors that dominated the paleoflora flora for millions of years. The group has a broad global distribution ranging from tundra to tropical forests and can make up an important component of temperate northeast US forests. Yet little is known of the ecophysiology of these plants. […] More
Experimental drought is well documented to induce a decline in photosynthetic capacity. However, if given time to acclimate to low water availability, the photosynthetic responses of plants to low soil moisture content may differ from those found in short-term experiments. Zhou et al. compared Eucalyptus taxa and tested whether plants respond by modifying the functional […] More
Benefits to crop productivity arising from increasing CO2 fertilization may be offset by detrimental effects of global climate change, such as an increasing frequency of drought. Phosphorus ( P ) nutrition plays an important role in crop responses to water stress, but how elevated CO2 (eCO2) and P nutrition interact, especially in legumes, is unclear. […] More
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