Intrinsic water-use efficiency influences establishment in Encelia farinosa

Ehleringer, James R.; Driscoll, Avery W.

doi:10.1007/s00442-022-05217-5

Cited by 3 publications

(2 citation statements)

References 83 publications

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“…Intrinsic water-use efficiency (iWUE) indicates a momentary balance of leaf carbon and water fluxes and corresponds to the ratio of assimilation rate (A n ) to stomatal conductance (g s ), (Roussel et al 2009;Petek-Petrik et al 2023). Higher iWUE can increase establishment and survival of the plants under water-deficit conditions (Ehleringer and Driscoll 2022). Enhancing iWUE is crucial for maximizing forest carbon assimilation capacity while conserving water resources (Zhang et al 2023;Petrík et al 2024).…”

Section: Introductionmentioning

confidence: 99%

“…This discrimination is more pronounced when leaf internal CO 2 concentrations are higher, for instance when stomata are fully open due to more intense gas exchange via stomata, which in turn is associated with a lower iWUE (Impa et al 2005). Thus, iWUE and δ 13 C are critical traits characterizing tree water-use use for carbon assimilation, growth and survival at different time scales, and of vital importance in the context of increasing evaporative demand due to climate change (Ehleringer and Driscoll 2022;Zhang et al 2023).…”

Section: Introductionmentioning

confidence: 99%

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Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Petrík,

Petek-Petrík,

Lamarque

et al. 2024

Preprint

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Water-use efficiency (WUE) is affected by multiple leaf traits, including stomatal morphology. However, the impact of stomatal morphology on WUE across different ontogenetic stages of tree species is not well-documented. Here, we investigated the relationship between stomatal morphology intrinsic water-use efficiency (iWUE=A/gs) and leaf carbon isotope ratio (δ13C). We sampled 190 individuals including juvenile and mature trees belonging to 18 temperate broadleaved tree species and 9 genera. We measured guard cell length (GCL), stomatal density (SD), specific leaf area (SLA), gas-exchange, iWUE and leaf δ13C as a proxy for long-term WUE. Leaf δ13C correlated positively with iWUE for both juvenile and mature trees. Across species, GCL showed a negative and SD a positive effect on iWUE and leaf δ13C of both juvenile and mature trees. Within species, however, only GCL was significantly associated with iWUE and leaf δ13C. Pioneer species (Populus,Prunus,Betula) showed a significantly lower leaf δ13C than climax forest species (Fagus,Quercus,Tilia), but the differentiation was not clear for iWUE. We conclude that GCL and SD can be considered as functional morphological traits impacting the iWUE and leaf δ13C of trees, highlighting their potential for rapid phenotyping approaches in ecological studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Petrík,

Petek-Petrík,

Lamarque

et al. 2024

Preprint

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Convergent morphology and anatomy in the microphyllous leaves of selected heathland Myrtaceae and Asteraceae

Dörken

Ladd

Parsons

2023

Trees

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Key message We examined leaves of a suite of microphyllous woody plants and describe a little-known form of leaf peltation for the first time and also investigate strongly reflexed leaves in two distantly related lineages. Abstract Plants cope with a range of environmental conditions, especially related to water relations, and have developed an array of physiological and structural solutions to maintain a functional water balance. There has been considerable recent work on physiological solutions to water deficit but little attention paid to leaf characteristics. In many species there is a change in leaf form from seedlings to adults. We examine such changes in several small-leaved species from the distantly related Asteraceae and Myrtaceae, some of which develop micropeltate or reflexed leaves as adults. All are native to dry or seasonally dry sites. Three major morphological groups were recognised as follows: (1) leaves erect, nonpeltate and scale-like (Ozothamnus hookeri), (2) leaves erect and peltate (Phaenocoma prolifera, Regelia inops), (3) Leaves reflexed (Olearia lepidophylla, Ozothamnus scutellifolius, Ozothamnus reflexifolius, Melaleuca diosmifolia). The microphyllous peltation in P. prolifera and R. inops in the absence of a meristematic fusion/bridge differs from typically peltate leaves. These small-leaved taxa occur in open, high light environments which are very different from the mesic, shaded understorey habitats of typical peltate-leaved plants. Many small-leaved species have leaves closely appressed to the stem and often with recurved margins. The erect leaves are functionally similar to reflexed leaves. Environmental filtering leads to superficially similar plant forms that may have somewhat different ontological origins. Such morphological forms are examples of convergent evolution in distantly related species but within each family are likely phylogenetically related.

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Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Petrík,

Petek‐Petrík,

Lamarque

et al. 2024

Physiologia Plantarum

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Water‐use efficiency (WUE) is affected by multiple leaf traits, including stomatal morphology. However, the impact of stomatal morphology on WUE across different ontogenetic stages of tree species is not well‐documented. Here, we investigated the relationship between stomatal morphology, intrinsic water‐use efficiency (iWUE) and leaf carbon isotope ratio (δ13C). We sampled 190 individuals, including juvenile and mature trees belonging to 18 temperate broadleaved tree species and 9 genera. We measured guard cell length (GCL), stomatal density (SD), specific leaf area (SLA), iWUE and bulk leaf δ13C as a proxy for long‐term WUE. Leaf δ13C correlated positively with iWUE across species in both juvenile and mature trees, while GCL showed a negative and SD a positive effect on iWUE and leaf δ13C. Within species, however, only GCL was significantly associated with iWUE and leaf δ13C. SLA had a minor negative influence on iWUE and leaf δ13C, but this effect was inconsistent between juvenile and mature trees. We conclude that GCL and SD can be considered functional morphological traits related to the iWUE and leaf δ13C of trees, highlighting their potential for rapid phenotyping approaches in ecological studies.

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Intrinsic water-use efficiency influences establishment in Encelia farinosa

Cited by 3 publications

References 83 publications

Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Convergent morphology and anatomy in the microphyllous leaves of selected heathland Myrtaceae and Asteraceae

Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

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