The impact of epicuticular wax on gas-exchange and photoinhibition in Leucadendron lanigerum (Proteaceae)

Mohammadian, Mansour Afshar; Watling, Jennifer R.; Hill, Robert S.

doi:10.1016/j.actao.2006.10.005

Cited by 47 publications

(36 citation statements)

References 47 publications

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“…5). Wax content on the leaf surface is directly related to E. Due to their hydrophobic character, the waxes play a crucial role in limiting water loss by E. For example, the coverage of wax in stomata entrances increased the resistance to gas diffusion and, by consequence, decreased the g s , E, and photosynthesis in Leucadendron lanigerum (Mohammadian et al 2007). Herein, the increase of wax near the stomata, due to the action of L-DOPA or aqueous extract of velvet bean, could have contributed to the reduction of the A, g s , and E (Figs.…”

Section: L-dopa and Aqueous Extracts Of Velvet Bean Decrease U Fmentioning

confidence: 97%

Photosynthetic response of soybean to L-DOPA and aqueous extracts of velvet bean

et al. 2016

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L-3,4-Dihydroxyphenylalanine (L-DOPA) is an allelochemical released by roots of velvet bean (Mucuna pruriens) that affects the growth of several plant species. However, its mechanism of action is inconclusive. In this work, we compared the effects of L-DOPA (0.01-1.0 mmol L -1 ) and of aqueous extracts (300, 1200, and 3000 mg L -1 ) of velvet bean on growth and photosynthesis (gas exchange and chlorophyll a fluorescence) of soybean (Glycine max). Overall, the results showed that both L-DOPA and aqueous extracts of velvet bean reduced the growth, leaf area, photosynthetic rate (A), stomatal conductance (g s ), transpiration (E), and quantum yield of electron flow through photosystem II (PSII) in vivo (U F ). In addition, L-DOPA and aqueous extracts increased the internal CO 2 concentration (Ci) and the leaf wax and trichome density on the leaf surface, while the maximum quantum yield of PSII (F v /F m ) was not changed. These results suggest that the reduction of A should not be related exclusively to the stomatal closure, but also to limitations of the carbon metabolism, as indicated by the increase of Ci and decrease of U F . Briefly, we concluded that soybean growth inhibition by L-DOPA and aqueous extracts of velvet bean is due to the combination of damage in the root meristem and reduction in A.

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Section: L-dopa and Aqueous Extracts Of Velvet Bean Decrease U Fmentioning

confidence: 97%

Photosynthetic response of soybean to L-DOPA and aqueous extracts of velvet bean

et al. 2016

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“…In particular, the fiddle-wood plant was detected to have only a trace amount of C 26 and C 36 n-alkenes in August, but a great amount of all the n-alkenes ranging from C 21 to C 35 in November. It was reported that the epicuticular wax will change in the constituents and the abundance to adapt to the surrounding temperature [25] . At the lower temperature, the plants tend to biosynthesize some unsaturated lipids to keep the fluidity of the cell membranes [26] .…”

Section: The Distribution and The Abundance Of N-alkenesmentioning

confidence: 99%

Characterstics of seasonal variations of leaf n-alkanes and n-alkenes in modern higher plants in Qingjiang, Hubei Province, China

2008

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“…This implied that wax on leaf surface might be involved in regulation of the stomatal aperture. The wax coverage at the entrance of stomata in Leucadendron lanigerum increased resistance to gas diffusion, resulting in decreased stomatal conductance, transpiration, and photosynthesis (Mohammadian et al 2007). Epicuticular wax load helped in maintaining stomata regulation and leaf water relations, thus affording adaptation to wild Arachis species to thrive under waterlimited environments (Nautiyal et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Variations of cuticular wax in mulberry trees and their effects on gas exchange and post-harvest water loss

Sun

Huang

et al. 2015

Acta Physiol Plant

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Though mulberry (Morus alba) tree shows great adaptations to various climate conditions, their leaf water status and photosynthesis are sensitive to climate changes. In the current study, seven widely planted mulberry cultivars in Chongqing, Southwest China, were selected to analyze leaf cuticular wax characteristics, gas exchange index, post-harvest leaf water status and their relationships, aiming to provide new theory in screening high resistant mulberry cultivars. Mulberry trees formed rounded cap-type idioblasts on the adaxial leaf surface. Film-like waxes and granule-type wax crystals covered leaf surfaces, varying in crystal density among cultivars. The stomatal aperture on the abaxial surface of cultivars with high wax amount was smaller than that of cultivars with low wax amount. The amount of total wax was negatively correlated with the net photosynthetic rate (P N ), transpiration rate (E) and stomatal conductance (g s ) and positively correlated with the moisture retention capacity. It suggested that both cuticular wax and stomatal factor might be involved in regulating water loss in mulberry leaves under field conditions. The variability in moisture retention capacity and cuticular wax characteristics might be important in evaluating and screening mulberry cultivars for increasing silk quality and silkworm productivity.

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The impact of epicuticular wax on gas-exchange and photoinhibition in Leucadendron lanigerum (Proteaceae)

Cited by 47 publications

References 47 publications

Photosynthetic response of soybean to L-DOPA and aqueous extracts of velvet bean

Photosynthetic response of soybean to L-DOPA and aqueous extracts of velvet bean

Characterstics of seasonal variations of leaf n-alkanes and n-alkenes in modern higher plants in Qingjiang, Hubei Province, China

Variations of cuticular wax in mulberry trees and their effects on gas exchange and post-harvest water loss

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