Land-surface models use different formulations of stomatal conductance and plant hydraulics, and it is unclear which type of model best matches the observed surface-atmosphere water flux. We use the North American Carbon Program data set of latent heat flux (LE) measurements from 25 sites and predictions from 9 models to evaluate models’ ability to resolve subdaily dynamics of transpiration. De...

SUMMARY Stomata have recently been theorized to evolved strategies that maximize turgor-driven growth over plants’ lifetimes, finding support through steady-state solutions, in which gas exchange, carbohydrate storage, and all reached an equilibrium. However, plants do not operate near as plant responses environmental forcings vary diurnally seasonally. It remains unclear how should be dynamica...

When it comes to water, plants are wasteful organisms. Although water is one of the most limiting factors for plant growth, taken up by roots directly released leaves into atmosphere. This because have make a compromise. For every molecule CO2 that absorbed through stomata, hundreds molecules lost in form vapor. To restrict loss, can close their but reduced uptake will inhibit photosynthesis an...

Maximum and minimum stomatal conductance, as well as stomatal size and rate of response, are known to vary widely across plant species, but the functional relationship between these static and dynamic stomatal properties is unknown. The objective of this study was to test three hypotheses: (i) operating stomatal conductance under standard conditions (g (op)) correlates with minimum stomatal c...

Fluorescence and thermal imaging were used to examine the dynamics of stomatal patches for a single surface of Xanthium strumarium L. leaves following a decrease in ambient humidity. Patches were not observed in all experiments, and in many experiments the patches were shortlived. In some experiments, however, patches persisted for many hours and showed complex temporal and spatial patterns. Ra...

Abstract Background Dust accumulation covers the leaf’s surface and influences foliar physiological activity. Two independent experiments were carried out to instigate responses dust penetration limitation of small particles (< 1 μm) on surface, respectively. In experiment I, three intensities achieved by a spraying treatment. Photosynthesis CO 2 exchange fast chlorophyll fluorescence transi...

Robust models of stomatal conductance are greatly needed to predict plant-atmosphere interactions in a changing climate and to integrate new knowledge in physiology and ecological theory. Recent years have brought major advances in the experimental and theoretical understanding underpinning both processbased and optimality-based approaches to modeling stomatal function. I review these advances,...

Abstract The effects of hydrogel granules mixed with peat substrate on germination, morphological and physiological parameters plugged seedlings were tested in tomato seedlings, at two different irrigation regimes. Due to presence, the germination speed was increased, whereas mean time significantly reduced. Slight improvement recorded regarding final but no effect found synchronisation index s...