Vulnerability to cavitation of leaf minor veins: any impact on leaf gas exchange?

Salleo, Sebastiano; Gullo, M. A. Lo; Raimondo, Fabio; Nardini, Andrea

doi:10.1046/j.0016-8025.2001.00734.x

Cited by 109 publications

(112 citation statements)

References 45 publications

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“…8E-H). Increases K leaf with increasing temperature and light have been previously reported for several species (Holbrook et al, 2001;O'Brien et al, 2004;Salleo et al, 2001;Voicu et al, 2008). The increase of K leaf was observed in previously water-stressed plants following rainfall.…”

Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 61%

“…The threshold was identified as the lowest rainfall event to be significantly different from the 0-5 mm rainfall class (Statistica version 8), conceptually similar to a method commonly used in ecotoxicology studies to identify the lowest observed effect concentration (Salleo et al, 2001). Data were excluded for the following situations, to comply with the characteristics of a rainfall pulse: when rainfall events lasted longer than 5 days or interpulse periods lasted less than 1 week.…”

Section: Discussionmentioning

confidence: 99%

“…The reason for the increment of water potential drops maybe that droughtinduced embolism is promptly refilled after rainfall (Sitková et al, 2014). In fact, the leaf provides probably the best environment for refilling of embolized conduits (Salleo et al, 2001) due to the relative abundance of inorganic ions and other osmolytes that could be used to generate positive pressures as well as possessing large amounts of metabolic energy to drive ion movement. In the current study, before rainfall, leaves in stems of H. rhamnoides lost nearly 100% of their K leaf but began to recover late in the day, while water potentials were still more negative than -2.2 MPa (Fig.…”

Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 99%

“…The increase of K leaf was observed in previously water-stressed plants following rainfall. Good evidence exists to suggest that xylem tissue collapse (Brodribb and Holbrook, 2006;Salleo et al, 2001) and leaf turgor loss Holbrook 2006, Gallé et al, 2007) may both play a part in the loss of K leaf in a variety of plants. Therefore, the rapid recovery of K leaf could also be attributed to the possible fact that the initial loss of K leaf is not associated with xylem cavitation.…”

Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 99%

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Sap flow in response to rainfall pulses for two shrub species in the semiarid Chinese Loess Plateau

Jian

et al. 2016

Journal of Hydrology and Hydromechanics

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Rainfall pulses can significantly drive the evolution of the structure and function of semiarid ecosystems, and understanding the mechanisms that underlie the response of semiarid plants to rainfall is the key to understanding the responses of semi-arid ecosystems to global climatic change. We measured sap flow in the branches and stems of shrubs (Caragana korshinskii Kom. and Hippophae rhamnoides Linn.) using sap flow gauges, and studied the response of sap flow density to rainfall pulses using the "threshold-delay" model in the Chinese Loess Plateau. The results showed that the sap flow began about 1 h earlier, and increased twofold after rainfall, compared to its pre-rainfall value. The sap flow increased significantly with increasing rainfall classes, then gradually decreased. The response of sap flow was different among rainfall, species, position (branch and stem) during the pulse period, and the interactive effects also differed significantly (P < 0.0001). The response pattern followed the threshold-delay model, with lower rainfall thresholds of 5.2, 5.5 mm and 0.7, 0.8 mm of stem and branch for C. korshinskii and H. rhamnoides, demonstrating the importance of small rainfall events for plant growth and survival in semi-arid regions.

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Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 99%

Section: Response Of Sap Flow To Water Potential and K Leafmentioning

confidence: 99%

See 2 more Smart Citations

Sap flow in response to rainfall pulses for two shrub species in the semiarid Chinese Loess Plateau

Jian

et al. 2016

Journal of Hydrology and Hydromechanics

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“…However, one has to be cautious when using this method, because the filtering has a strong effect on the estimated vulnerability. Other arbitrary methods include setting the endpoint at a water potential value that equals (i) the endpoint taken from parallel testing with another method [77]; (ii) a value taken from literature; or (iii) the turgor loss point of the leaves [78,79].…”

Section: Endpoint Selectionmentioning

confidence: 99%

Acoustic Emissions to Measure Drought-Induced Cavitation in Plants

et al. 2016

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Acoustic emissions are frequently used in material sciences and engineering applications for structural health monitoring. It is known that plants also emit acoustic emissions, and their application in plant sciences is rapidly increasing, especially to investigate drought-induced plant stress. Vulnerability to drought-induced cavitation is a key trait of plant water relations, and contains valuable information about how plants may cope with drought stress. There is, however, no consensus in literature about how this is best measured. Here, we discuss detection of acoustic emissions as a measure for drought-induced cavitation. Past research and the current state of the art are reviewed. We also discuss how the acoustic emission technique can help solve some of the main issues regarding quantification of the degree of cavitation, and how it can contribute to our knowledge about plant behavior during drought stress. So far, crossbreeding in the field of material sciences proved very successful, and we therefore recommend continuing in this direction in future research.

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Structural adaptations in plants from the humid equatorial Andes indicate a trade‐off between hydraulic transport efficiency and safety

Soukup

Pecková

Ježková

et al. 2021

American J of Botany

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PremiseEnvironmental gradients of mountains are reflected in traits that are common to high‐elevation plants worldwide. Closely related species of Senecio from the equatorial Andes grow as broad‐leaved climbers in montane forests, basal broad‐leaved rosette herbs in azonal marshy habitats, and ascending, narrow‐leaved subshrubs in high‐elevation páramo. Habitat variation along the elevational gradient enables testing whether modifications in leaf and stem functional traits among species were driven by contrasting environmental conditions.MethodsWe used quantitative analyses to describe changes in morphological and anatomical traits of leaves and stems in 10 species from various habitats. We applied univariate (linear regression, hierarchical ANOVA) and multivariate (NMDS ordination, permutational MANOVA) techniques to examine the correlation of traits with the species' habitats and elevation.ResultsSpecies from the humid and frost‐free montane forest develop xylem optimized for transport efficiency by increasing the internal diameter and length of the conduits. In contrast, páramo species are optimized toward hydraulic safety by producing narrower conduits and are more likely to prevent the risk of frost‐induced cavitation. Moreover, species from the high‐elevation páramo habitats present a set of water‐transport‐related anatomical traits of leaf lamina, allowing for efficient regulation of transpiration losses.ConclusionsMorphological and anatomical traits of leaves and stems in species of Senecio inhabiting montane forests and high‐elevation páramo in the equatorial Andes demonstrate a trade‐off between hydraulic safety and efficiency of water transport.

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Vulnerability to cavitation of leaf minor veins: any impact on leaf gas exchange?

Abstract: ABSTRACT

Cited by 109 publications

References 45 publications

Sap flow in response to rainfall pulses for two shrub species in the semiarid Chinese Loess Plateau

Sap flow in response to rainfall pulses for two shrub species in the semiarid Chinese Loess Plateau

Acoustic Emissions to Measure Drought-Induced Cavitation in Plants

Structural adaptations in plants from the humid equatorial Andes indicate a trade‐off between hydraulic transport efficiency and safety

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