Effect of Rainfall Exposure on Leaf Wettability in Near-Isogenic Barley Lines with Different Leaf Wax Content.

Tanakamaru, Shigemi; Takehana, Toshihiko; Kimura, Kensuke

doi:10.2480/agrmet.54.155

Cited by 10 publications

(14 citation statements)

References 10 publications

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“…The presence of trichomes or wax crystals may explain the lower retention of water drops on leaves of Trifolium pretense compared with Trifolium repens [1], and the smaller leaf water retention in young leaves when compared with old leaves [30]. This can be ascribed to two main factors, i.e.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Leaf Roughness, Surface Free Energy and Work of Adhesion on Leaf Water Drop Adhesion

Wang

Shi

et al. 2014

PLoS ONE

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The adhesion of water droplets to leaves is important in controlling rainfall interception, and affects a variety of hydrological processes. Leaf water drop adhesion (hereinafter, adhesion) depends not only on droplet formulation and parameters but also on the physical (leaf roughness) and physico-chemical (surface free energy, its components, and work-of-adhesion) properties of the leaf surface. We selected 60 plant species from Shaanxi Province, NW China, as experimental materials with the goal of gaining insight into leaf physical and physico-chemical properties in relation to the adhesion of water droplets on leaves. Adhesion covered a wide range of area, from 4.09 to 88.87 g/m2 on adaxial surfaces and 0.72 to 93.35 g/m2 on abaxial surfaces. Distinct patterns of adhesion were observed among species, between adaxial and abaxial surfaces, and between leaves with wax films and wax crystals. Adhesion decreased as leaf roughness increased (r = −0.615, p = 0.000), but there were some outliers, such as Salix psammophila and Populus simonii with low roughness and low adhesion, and the abaxial surface of Hyoscyamus pusillus and the adaxial surface of Vitex negundo with high roughness and high adhesion. Meanwhile, adhesion was positively correlated with surface free energy (r = 0.535, p = 0.000), its dispersive component (r = 0.526, p = 0.000), and work of adhesion for water (r = 0.698, p = 0.000). However, a significant power correlation was observed between adhesion and the polar component of surface free energy (p = 0.000). These results indicated that leaf roughness, surface free energy, its components, and work-of-adhesion for water played important roles in hydrological characteristics, especially work-of-adhesion for water.

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Section: Discussionmentioning

confidence: 99%

The Effects of Leaf Roughness, Surface Free Energy and Work of Adhesion on Leaf Water Drop Adhesion

Wang

Shi

et al. 2014

PLoS ONE

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“…The epicuticular waxes may be eroded from leaf surfaces during frequent rainfall events, resulting in that leaves become more wettable (Aryal & Neuner, 2010;Brewer & Nunez, 2007;Tanakamaru et al, 1998). The epicuticular waxes may be eroded from leaf surfaces during frequent rainfall events, resulting in that leaves become more wettable (Aryal & Neuner, 2010;Brewer & Nunez, 2007;Tanakamaru et al, 1998).…”

Section: Leaf Wettability In Relation To External Conditionsmentioning

confidence: 99%

“…A high density of trichomes and stomata on surfaces were generally related to decreased leaf wettability (Pandey & Nagar, 2003;Rosado & Holder, 2013;Wagner, Fürstner, Barthlott, & Neinhuis, 2003). These surface morphological features are variable during plant growth and greatly influenced by external habitat conditions, such as rainfall, air temperature, and humidity (Tanakamaru, Takehana, & Kimura, 1998;Koch, Hartmann, Schreiber, Barthlott, & Neinhuis, 2006;Aryal & Neuner, 2010;Zhu et al, 2014). Some researchers indicated that leaves in dry habitats tended to be less wettable as a functional response to replenish more rainfall into the soil and improve water availability (Brewer & Nunez, 2007;Holder, 2007).…”

Section: Introductionmentioning

confidence: 99%

Variability in leaf wettability and surface water retention of main species in semiarid Loess Plateau of China

et al. 2018

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Leaf wettability, adhesion or repulsion of water drops, varies greatly among species and plays an important role in plant-soil hydrological relations. This study aimed to examine the variability in leaf wettability among species in different habitats and growth periods, and their relationships with plant surface water retention in the semiarid Loess Plateau of China. The leaf adaxial and abaxial contact angles, the surface water retention of leaves and individual plants, and general plant traits of 68 species belonging to 28 families were examined from May to August in 2017. Results showed that leaf water contact angles ranged from 27.3°to 133.4°and leaves with higher contact angles normally had lower variation coefficients. Leaf wettability was affected by internal properties (including leaf side, family, and leaf age) and external conditions (growth period), whereas the life form and slope aspect did not show significant effects. There were 47 species having higher contact angles on adaxial than abaxial surfaces, and the differences were significant in 23 species. Gramineous and leguminous species were more unwettable than compositae and rosaceous species. New leaves were more unwettable than old leaves. Surface wettability increased from May-June to July-August period. Leaf wettability was positively correlated with leaf surface water retention and was the best predictor of individual plant surface water retention compared with other plant traits. Leaf wettability showed interspecific differences associated with family and growth stage and can be a considerable variable in predicting canopy interception and evaluating vegetation hydrological function in drought environments.

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“…Whether water remains on the surface of the leaf or is repelled depends on numerous leaf properties, including wax layer thickness and composition (Holloway 1969;Tanakamaru et al 1998), trichomes or the number and distribution of stomata (Brewer and Nuñez 2007). Leaf wetting further affects numerous ecological processes, such as photosynthesis rate (Hanba et al 2004), pathogen infection (Rowlandson et al 2015) or absorption and removal of pollutants (Neinhuis and Barthlott 1997).…”

Section: Introductionmentioning

confidence: 99%

Variation in Leaf Surface Hydrophobicity of Wetland Plants: the Role of Plant Traits in Water Retention

et al. 2017

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Leaf surface wetness has numerous physiological and ecological consequences, and the morphological structures on the leaf surface can affect its extent and duration, contributing to interception rates in the scale of the whole ecosystem. Wetland plants have developed morphological adaptations to high water level allowing them to avoid water excess. Droplet contact angle and surface free energy are measurable parameters which relate to how the plant influences water usage and redistribution. We analysed patterns of contact angle and the surface free energy of the adaxial and abaxial surface of 10 wetland plant species and related them to the optimal habitat conditions and functional traits of the plants. Despite the consistent environment of these plants, we found them to vary greatly in terms of leaf surface wettability and surface free energy, with contact angles ranging from 75 to 169°and surface free energy, from 1.32 to 30.38 mJ/m 2 . Canopy height and leaf longevity were significantly correlated to leaf wettability, whilst SLA (Specific Leaf Area) and leaf shape were not related to hydrophobicity. Investigating adaptations of wetland plants to their environment showed that including wettability and surface free energy in combination with other plant traits improves our understanding of water plant-soil-water interactions in wetland habitats.

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Effect of Rainfall Exposure on Leaf Wettability in Near-Isogenic Barley Lines with Different Leaf Wax Content.

Cited by 10 publications

References 10 publications

The Effects of Leaf Roughness, Surface Free Energy and Work of Adhesion on Leaf Water Drop Adhesion

The Effects of Leaf Roughness, Surface Free Energy and Work of Adhesion on Leaf Water Drop Adhesion

Variability in leaf wettability and surface water retention of main species in semiarid Loess Plateau of China

Variation in Leaf Surface Hydrophobicity of Wetland Plants: the Role of Plant Traits in Water Retention

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