Differences in leaf gas exchange strategies explain Quercus rubra and Liriodendron tulipifera intrinsic water use efficiency responses to air pollution and climate change

Abstract

Trees continuously regulate leaf physiology to acquire CO 2 while simultaneously avoiding excessive water loss. The balance between these two processes, or water use efficiency (WUE), is fundamentally important to understanding changes in carbon uptake and transpiration from the leaf to the globe under environmental change.

Genome-Wide Association Analysis of Rice Leaf Traits

“…Rice is one of the world's major food crops [48]. As the main organ of seed plants to produce organic nutrients, leaves are important for plants to carry out various physiological and biochemical activities, such as photosynthesis, respiration, and transpiration [49]. This study involved 393 rice accessions from all over the world, which have rich genetic variations and are representative for GWAS mapping to reveal the genetic basis of rice leaf shape.…”

Interacting effects of fire and hydroclimate on oak and beech community prevalence in the southern Great Lakes region

“…In terms of water‐use strategies, plants that prioritize carbon gain relative to water loss have low iWUE and δ 13 C values, whereas those that prioritize water conservation relative to carbon gain have high iWUE and δ 13 C values (Bacon, 2009; Farquhar & Sharkey, 1982) and dry conditions tend to favour the latter (Sperry et al., 2017). Atmospheric CO 2 , atmospheric pollution and climate (temperature and precipitation) have been shown to affect plant iWUE during the historical record via their influences on photosynthesis and/or stomatal conductance (Mathias et al., 2023), though the former two factors are unlikely to have been significant controls of iWUE during the Holocene prior to the industrial revolution. Pollen δ 13 C values (δ 13 C pollen ) represent landscape‐ to population‐level shifts in iWUE because multiple pollen grains must be combined to produce enough carbon for δ 13 C analysis and each sediment sample comprises pollen grains from many individual plants within pollen source radii on the order of 10s of km (Prentice, 1988).…”

“…Atmospheric CO 2 , atmospheric pollution and climate (temperature and precipitation) have been shown to affect plant iWUE during the historical record via their influences on photosynthesis and/ or stomatal conductance (Mathias et al, 2023), though the former two factors are unlikely to have been significant controls of iWUE during the Holocene prior to the industrial revolution. Pollen δ 13 C values (δ 13 C pollen ) represent landscape-to population-level shifts in iWUE because multiple pollen grains must be combined to produce enough carbon for δ 13 C analysis and each sediment sample comprises pollen grains from many individual plants within pollen source radii on the order of 10s of km (Prentice, 1988).…”