Photoprotective implications of leaf variegation in E. dens-canis L. and P. officinalis L.

Esteban, Raquel; Fernández‐Marín, Beatriz; Garcı́a-Plazaola, José Ignacio

doi:10.1016/j.jplph.2007.07.024

Cited by 70 publications

(48 citation statements)

References 50 publications

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“…CET around PSII also has often been proposed to be involved in photoprotection (Arnon and Tang 1988;Allakhverdiev et al 1997;Laisk et al 2006) that can be of special interest in consideration of possible changes in sensitivity of variegated plants to light excess (Esteban et al 2008). At the same time alterations of electron transport organization in chlorophyll-deWcient tissues of some plants can result from the fact that residual chlorophyll of albino areas of variegated tissue originates from chloroplasts of single guard cell pairs.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence kinetic parameters and cyclic electron transport in guard cell chloroplasts of chlorophyll-deficient leaf tissues from variegated weeping fig (Ficus benjamina L.)

Лысенко

2011

Planta

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Residual chlorophyll in chlorophyll-deficient (albino) areas of variegated leaves of Ficus benjamina originates from guard cell chloroplasts. Photosynthetic features of green and albino sectors of F. benjamina were studied by imaging the distribution of the fluorescence decrease ratio Rfd within a leaf calculated from maximum (Fm) and steady-state leaf chlorophyll fluorescence (Fs) at 690 and 740 nm. Local areas of albino sectors demonstrated an abnormally high Rfd(740)/Rfd(690) ratio. Fluorescence transients excited in albino sectors at red (640 and 690 nm) wavelengths showed an abrupt decrease of the Rfd values (0.4 and 0.1, correspondingly) as compared with those excited at blue wavelengths (1.7-2.4). This "Red Drop" was not observed for green sectors. Normal and chlorophyll-deficient leaf sectors of F. benjamina were also tested for linear and cyclic electron transport in thylakoids. The tests have been performed studying fluorescence at a steady-state phase with CO(2)-excess impulse feeding, photoacoustic signal generated by pulse light source at wavelengths selectively exciting PSI, fluorescence kinetics under anaerobiosis and fluorescence changes observed by dual-wavelength excitation method. The data obtained for albino sectors strongly suggest the possibility of a cyclic electron transport simultaneously occurring in guard cell thylakoids around photosystems I and II under blue light, whereas linear electron transport is absent or insufficient.

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Section: Introductionmentioning

confidence: 99%

Fluorescence kinetic parameters and cyclic electron transport in guard cell chloroplasts of chlorophyll-deficient leaf tissues from variegated weeping fig (Ficus benjamina L.)

Лысенко

2011

Planta

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“…The fact that adult plants (flowering or not) exhibited similar leaf patterns (background and spots) and underwent parallel discoloration processes is inconsistent with a specific function of mottling in pollinator attraction to the flowers, as hypothesized by La Rocca et al (2014). On the other hand, a possible role of leaf mottling in photoprotection (Esteban et al 2008) seems consistent, at least, with the presence of a rusty highland variant. However, one of the most likely explanations of Erythronium's mottling remains camouflage against herbivores, as proposed by Givnish (1990).…”

Section: Discussionmentioning

confidence: 88%

Population structure of Erythronium dens-canis L. (Liliaceae) in the northern Apennines (Italy)

Pupillo¹,

Astuti²

2017

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Relationships between age, time of emergence, and leaf traits of individuals were investigated in a population of Erythronium dens-canis L. in a hilly woodland area named Farneto-C, near Bologna, Italy. In 2015, 591 individuals were counted, 19 of which were flowering (FLO), 442 were mature non-flowering (MNF) and 130 were juveniles (JUV). FLO emerged at the end of February, whereas most MNF and JUV appeared at the middle and end of March, respectively. The mean aboveground survivorship of MNF was 24 days. Most MNF had large, oval to shield-shaped leaves with red-brown mottling, whereas most JUV leaves were smaller, usually oblong or lanceolate with a rough maculation or none. These results suggest that both timing of emergence and leaf shape are related to the age of the bulb. Based on leaf background, plants were classified into three major types with a likely genetic basis in the 2015 and 2016 surveys (the latter limited to FLO): a dominant silvery type (SLV, 62-74%), silvery-and-green type (S&G, 23-32%), and a less frequent vivid-green type (GRN, 3-5%). Several subtypes were also identified, but only one was dominant within each type. The three basic patterns appear to be phenotypically stable and no differences between MNF and FLO were found; once the juvenile stage has passed, each plant produces the same leaf type year after year. In addition, our results on the discoloration time-course of red-brown spots suggest that the functional role of leaf mottling is not related to pollinator attraction. Instead, leaf mottling could play a role in camouflage against herbivores.The observed massive grazing on flowers, more than leaves, could explain why the frequency of mature individuals was biased towards the non-flowering ones.

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“…This provides the different leaf portions with different optical properties. Despite the higher reflectance of the blotches for all wavelengths, the light green leaf areas are not more photo-protected than the other leaf portions (Esteban et al 2008). In both leaf areas, the same amount of UV-B absorbing compounds was stored under elevated UV-B radiation (Gaber s cik et al 2001).…”

Section: ( C ) P E R E N N a T I O N : R E P R O D U C T I O Nmentioning

confidence: 96%

“…Variegation of leaves was initially thought to protect against photo-damage (Esteban et al 2008). The light green blotches on the leaves of P. officinalis result from loosely arranged palisade parenchyma cells, in contrast to the tightly packed cells of the darker green areas.…”

Section: ( C ) P E R E N N a T I O N : R E P R O D U C T I O Nmentioning

confidence: 99%

Biological Flora of the British Isles: Pulmonaria officinalis

et al. 2013

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Summary1. This account presents information on all aspects of the biology of Pulmonaria officinalis L. (Common Lungwort) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characteristics, herbivores and disease, history and conservation. 2. Pulmonaria officinalis is a distylous, perennial rosette hemicryptophyte that is naturalized in Britain. It occurs predominantly in the understory of broadleaved, mixed, open woods rich in hornbeam, beech and oak, but is has also been recorded from hedges, banks alongside streams, (sunken) roadsides, built-up areas, gardens, rubbish tips, yew woodland and, less frequently, coniferous woodland. Its native range stretches from southern Sweden, in the north, to northern Italy, in the south, and from western Germany to Poland and Lithuania. It is most common in central Europe. 3. Pulmonaria officinalis reproduces both by sexual and vegetative means. The underground parts consist of a slowly creeping rhizome with adventitious roots. Despite the presence of an elaiosome that is attractive to ants that likely facilitates seed dispersal, populations often show a significant fine-scale spatial genetic structure and small neighbourhood sizes. 4. The leaves and flowering stalks are covered in hairs of varied length and stiffness, and stems and inflorescences are sparsely covered with glandular hairs. Flowers of P. officinalis are heterostylous, with distinct pin and thrum morphs. The corolla varies from purple, violet or blue to shades of pink and red, or sometimes white. The flowers are mainly pollinated by solitary bees and bumblebees. 5. Pulmonaria officinalis has significantly expanded its distribution in the British Isles since the 18th century, especially in southern England. P. officinalis is currently not regarded as threatened in Europe. Nonetheless, small, isolated populations of the species often show reduced reproductive success and lower genetic diversity, potentially affecting their long-term survival. Preservation of local habitat conditions by regular opening of the forest canopy and restoration of gene flow among populations are required to maintain viable populations of P. officinalis in the long term.

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Photoprotective implications of leaf variegation in E. dens-canis L. and P. officinalis L.

Cited by 70 publications

References 50 publications

Fluorescence kinetic parameters and cyclic electron transport in guard cell chloroplasts of chlorophyll-deficient leaf tissues from variegated weeping fig (Ficus benjamina L.)

Fluorescence kinetic parameters and cyclic electron transport in guard cell chloroplasts of chlorophyll-deficient leaf tissues from variegated weeping fig (Ficus benjamina L.)

Population structure of Erythronium dens-canis L. (Liliaceae) in the northern Apennines (Italy)

Biological Flora of the British Isles: Pulmonaria officinalis

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