Increasing atmospheric CO₂ concentrations accompanied by abiotic stresses challenge food production worldwide. Elevated CO₂ (e[CO₂]) affects plant water relations via multiple mechanisms involving abscisic acid (ABA). Here, two tomato (Solanum lycopersicum) genotypes, Ailsa Craig (AC) and its...

We investigated the effects of elevated CO₂ concentration ([CO₂]), different irrigation regimes, and their interactions on leaf gas exchange, water relations, biomass production, and water use efficiency in tomato plants. In spring 2014, two tomato cultivars (CV1, which is potentially drought...

Studies have shown that higher concentrations of atmospheric carbon dioxide affect crops in two important ways: they boost crop yields by increasing the rate of photosynthesis, which spurs growth, and they reduce the amount of water crops lose through transpiration. Plants transpire through their...

Taking the Caragana korshinskii shrub in Hobq desert as the study object, the water supply and drought degree of soil were controlled manually, the variation characteristics of photosynthetic characteristics and water use efficiency of C korshinskii leaves under different soil water content were...

Effect of atmospheric CO₂ enrichment on crop water relations was evaluated in an open-top chamber experiment on kabuli chickpea (Cicer arietinum L.; Pusa 1,105). Increase in atmospheric CO₂ concentration (e[CO₂], 580 ± 20 μmol/mol) resulted in 21%-46% increase in leaf water potential, and 7%-11% in ...

Both ozone (O₃) and drought can limit carbon fixation by forest trees. To cope with drought stress, plants have isohydric or anisohydric water use strategies. Ozone enters plant tissues through stomata. Therefore, stomatal closure can be interpreted as avoidance to O₃ stress. Here, we applied an...

Key message : In urban shrub trees, the species-specific photosynthetic response and water-use properties are related to the xylem anatomy of the petiole. It is becoming essential to select urban tree species based on drought response in warm temperate regions, because water limitation is prone to...

The growth and survival rates of plants are greatly affected by rainfall in desert steppe. This research investigated the soil water fluctuations after rainfall events for four consecutive years from 2017 to 2020 in an Artemisia scoparia population in an Eastern Ningxia desert steppe. We determined ...

Plant stomatal conductance regulates photosynthesis and transpiration. This physiological link affects ecosystem responses to microclimate and harmonizes carbon, energy, and water exchanges between the biosphere and atmosphere. The relationship between water losses via transpiration and carbon...

In this review, I first address the basics of gas exchange, water-use efficiency and carbon isotope discrimination in C₃ plant canopies. I then present a case study of water-use efficiency in northern Australian tree species. In general, C₃ plants face a trade-off whereby increasing stomatal...