Different salt concentrations induce alterations both in photosynthetic parameters and salt gland activity in leaves of the mangrove Avicennia schaueriana

Garcia, Janaina dos Santos; Dalmolin, Ândrea Carla; França, Marcel Giovanni Costa; Mangabeira, Pedro Antônio Oliveira

doi:10.1016/j.ecoenv.2017.03.016

Cited by 32 publications

(10 citation statements)

References 27 publications

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“…These results demonstrate that salt glands are important for tolerance not only to high salinity levels (Garcia et al . ), but also to Cd exclusion and tolerance in A. schaueriana .…”

Section: Discussionmentioning

confidence: 98%

“…The proximity of these areas to marine ecosystems allows a frequent and significant flow of salt water, which requires strategies to survive under such conditions (Garcia et al . ). Also, some studies have indicated that this ecosystem could be a water purifier, with some plants selectively accumulating certain metals and neutralising the toxicity of pollutants (Bodin et al .…”

Section: Introductionmentioning

confidence: 97%

“…One of the distinctive morphological traits of these plants is the occurrence of the salt glands on both sides of the leaf, probably related to exclusion of excess salt in mangrove ecosystems, as reported in the literature (Parida & Jah ; Garcia et al . ). We collected young plants of A. schaueriana in a mangrove site near an urban area subjected to waste water and exposed them to simulated mangrove conditions contaminated by Cd.…”

Section: Introductionmentioning

confidence: 97%

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Ultrastructural and metabolic disorders induced by short‐term cadmium exposure in Avicennia schaueriana plants and its excretion through leaf salt glands

Mizushima¹,

Ferreira²,

França³

et al. 2019

Plant Biol J

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Environmental cadmium (Cd) sources have increased in mangrove sediments in recent decades, inducing cellular damage to many plants. Avicennia schaueriana is abundant in mangrove sites and has been subject to Cd contamination. The possible effects of Cd toxicity and the structural and physiological disturbances to this plant were studied. Can this plant express early cellular tolerance mechanisms to such metal contamination?• Seedlings of A. schaueriana were collected from sites of their natural occurrence, placed in plastic pots containing nutrient solution for 60 days, and subsequently exposed to increasing Cd concentrations for 5 days under experimental conditions. The anatomical, ultrastructural and physiological changes induced by Cd were analysed.• Cd accumulated mainly in the root system and in pneumatophores, stems and leaves, induced differential accumulation of mineral nutrients, but did not induce necrosis or changes in leaf anatomy. However, there was a decrease in starch grains and an increase in deposited electron-dense material in the cortex and vascular bundles. Cd induced both increases in calcium (Ca) content in shoots and Ca oxalate crystal precipitation in leaf mesophyll and was detected in crystals and in the secretion of salt glands.• Our observations and experimental results provide evidence of Cd tolerance in A. schaueriana. As a new feature, despite the clear cellular physiological disorders, this plant is able to eliminate Cd through leaf salt glands and immobilise it in Ca crystals, representing fast mechanisms for Cd exclusion and complexation in leaves in heavy metal coastal polluted marine ecosystems.

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“…These results demonstrate that salt glands are important for tolerance not only to high salinity levels (Garcia et al . ), but also to Cd exclusion and tolerance in A. schaueriana .…”

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Ultrastructural and metabolic disorders induced by short‐term cadmium exposure in Avicennia schaueriana plants and its excretion through leaf salt glands

Mizushima¹,

Ferreira²,

França³

et al. 2019

Plant Biol J

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“…The whole cp information will help us to understand and progress the species identification, evolution, and genetic engineering in Combretaceae plants. Furthermore, only few of about 70 mangrove species have cp genome information, although the chloroplasts may play an important role for mangroves to inhabit the sea habitat [ 20 ]. Under salt stress, the obvious changes were found in the chloroplast ultrastructure, the expression of chloroplast genes, and even chloroplast proteins [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Chloroplast Genome Sequences and Comparative Analyses of Combretaceae Mangroves with Related Species

Zhang

Zhong

et al. 2020

BioMed Research International

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In the Combretaceae family, only two species of Lumnitzera and one species of Laguncularia belong to mangroves. Among them, Lumnitzera littorea (Jack) Voigt. is an endangered mangrove plant in China for the limited occurrence and seed abortion. In contrast, Lumnitzera racemosa Willd. is known as the most widespread mangrove plant in China. Laguncularia racemosa C. F. Gaertn., an exotic mangrove in China, has the fast growth and high adaptation ability. To better understand the phylogenetic positions of these mangroves in Combretaceae and in Myrtales and to provide information for studies on evolutionary adaptation for intertidal habitat, the complete chloroplast (cp) genomes of Lu. racemosa and La. racemosa were sequenced. Furthermore, we present here the results from the assembly and annotation of the two cp genomes, which were further subjected to the comparative analysis with Lu. littorea cp genomes we published before and other eleven closely related species within Myrtales. The chloroplast genomes of the three Combretaceae mangrove species: Lu. littorea, Lu. racemosa, and La. racemosa are 159,687 bp, 159,473 bp, and 158,311 bp in size. All three cp genomes host 130 genes including 85 protein-coding genes, 37 tRNAs, and 4 rRNAs. A comparative analysis of those three genomes revealed the high similarity of genes in coding-regions and conserved gene order in the IR and LSC/SSC regions. The differences between Lumnitzera and Laguncularia cp genomes are the locations of rps19 and rpl2 genes in the IR/SC boundary regions. Investigating the effects of selection events on shared protein-coding genes showed a relaxed selection had acted on the ycf2, ycf1, and matK genes of Combretaceae mangroves compared to the nonmangrove species Eucalyptus aromaphloia. The phylogenetic analysis based on the whole chloroplast genome sequence with one outgroup species strongly supported three Combretaceae mangroves together with other two Combretaceae species formed a cluster in Combretaceae. This study is the first report on the comparative analysis of three Combretaceae mangrove chloroplast genomes, which will provide the significant information for understanding photosynthesis and evolution in Combretaceae mangrove plants.

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“…Mangroves are a functional group characterized by possession of common morphological, biochemical, physiological, and reproductive adaptations that allow them to develop in saline and hypoxic environments (Pastor-Guzman, Dash, & Atkinson, 2018). Some of the most important characteristics include aerial roots, the ability to eliminate excess salts through salt glands, retention of nutrients and vivipary (Sahu, Singh, & Kathiresan, 2016;Garcia, Dalmolin, França, & Mangabeira, 2017). Mangrove phenology provides important information about species interactions within communities and overall community function (Fenner, 1998;Wang'ondu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Structural characterization, reproductive phenology and anthropogenic disturbance of mangroves in Costa do Sol, Bons Sinais Estuary and Pemba-Metuge from Mozambique

Amade

Chirwa

Falcão

et al. 2018

Journal of Sustainable Forestry

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Mangrove forests are among the most important ecosystems with high ecological and economic value. In order to better understand and conserve this ecosystem, we aim to provide an overview of mangrove structure along the southern, central and northern parts of Mozambique, in Costa do Sol (CS), Bons Sinais Estuary (BSE) and Pemba-Metuge (PM), respectively. A total of 10 plots/site (10 × 10 m) along a transect perpendicular to the seashore were used. Inside the plots, the stem diameter and height were measured, and the species identified. The phenology and deforestation were categorized, and dead stumps were identified by species and its diameter measured. A total of five mangrove CONTACT Faura M. C.

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Different salt concentrations induce alterations both in photosynthetic parameters and salt gland activity in leaves of the mangrove Avicennia schaueriana

Cited by 32 publications

References 27 publications

Ultrastructural and metabolic disorders induced by short‐term cadmium exposure in Avicennia schaueriana plants and its excretion through leaf salt glands

Ultrastructural and metabolic disorders induced by short‐term cadmium exposure in Avicennia schaueriana plants and its excretion through leaf salt glands

Chloroplast Genome Sequences and Comparative Analyses of Combretaceae Mangroves with Related Species

Structural characterization, reproductive phenology and anthropogenic disturbance of mangroves in Costa do Sol, Bons Sinais Estuary and Pemba-Metuge from Mozambique

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