The effects of zinc, copper and cadmium on the fine structure of Ceramium ciliatum (Rhodophyceae, Ceramiales)

Diannelidis, B. E.; Delivopoulos, Stylianos G.

doi:10.1016/s0141-1136(96)00106-7

Cited by 25 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, the chloroplasts of G. domingensis exposed to cadmium showed significant structural changes, including modification in the quantity, size, and organization of thylakoids. Similar results were observed with the red macroalga Ceramium ciliatum exposed to cadmium, where the chloroplast appeared with disrupted thylakoids and an increase in plastoglobuli volume [8], and with H. musciformis after exposure to cadmium during 7 days [6]. However, it should be noted that Talarico [7] demonstrated only a few changes in the chloroplast organization of Audouinella saviana after exposure to cadmium.…”

Section: Discussionsupporting

confidence: 82%

“…Several studies have shown effects such as the decrease of macroalgae growth rates [2], increased activities of glutathione reductase [5], changes in photosynthetic pigments [1,6] and photosynthetic efficiency [2,6], as well as an increase in total proteins and lipid contents [1]. Finally, some reports have shown changes in the ultrastructure of the red algae Audouinella savina (F. S. Collins) Woelkerling [7] and Ceramium ciliatum (J. Ellis) Ducluzeau [8], Hypnea musciformis (Wulfen) Lamouroux [6]; the green algae Dunaliella minuta Lerche [9], Enteromorpha flexuosa (Wulfen) J. Agardh [10], Euglena gracilis Klebs [1], and the brown algae Padina gymnospora (Kützing) Sonder [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)

dos¹,

C.²,

P.³

et al. 2012

AJPS

View full text Add to dashboard Cite

This paper aimed to evaluate the effects of different concentrations of cadmium on growth rates, photosynthetic pigments, photosynthetic performance, biochemical parameters and structure of chloroplasts in G. domingensis. To accomplish this, apical segments of G. domingensis were cultivated with different concentrations of cadmium, ranging from 100 to 300 μM, over a period of 16 days, and were processed for transmission electron microscopy analysis. The plants exposed to cadmium showed chloroplast alteration, especially degeneration of thylakoids and a decrease in the concentration of photosynthetic pigments, such as chlorophyll a and phycobiliproteins. However, the volume of plastoglobuli increased. As a defense mechanism, the plants treated with cadmium showed an increase in glutathione reductase activity. These results agree with the decreased photosynthetic performance and relative electron transport rate observed after exposure of algae to cadmium. Taken together, these findings strongly indicate that cadmium negatively affects the ultrastructure and metabolism of the agarophyte G. domingensis, thus posing a threat to the economic vitality of this red macroalga.

show abstract

Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)

dos¹,

C.²,

P.³

et al. 2012

AJPS

View full text Add to dashboard Cite

show abstract

“…In the case of carrageenan, metal binding is associated with the degree of sulfatation (Diannelidis and Delivopoulos 1997).…”

Section: Discussionmentioning

confidence: 99%

“…Finally, some reports have shown changes in the ultrastructure of the red algae Audouinella savina (F.S. Collins) Woelkerling (Talarico 2002) and Ceramium ciliatum (J. Ellis) Ducluzeau (Diannelidis and Delivopoulos 1997); the green algae Dunaliella minuta Lerche (Visviki and Rachlin 1992), Enteromorpha flexuosa (Wulfen) J. Agardh (Andrade et al 2004) and Euglena gracilis Klebs (Rocchetta et al 2007); and the brown algae Padina gymnospora (Kützing) Sonde (Andrade et al 2002;.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influences of cadmium on fine structure and metabolism of Hypnea musciformis (Rhodophyta, Gigartinales) cultivated in vitro

et al. 2011

View full text Add to dashboard Cite

The in vitro effect of cadmium on apical segments of Hypnea musciformis was examined. Over a period of 7 days, the segments were cultivated with different concentrations of cadmium, ranging from 50 to 300 μM. The samples were processed for microscopic and histochemical analysis of growth rates, content of photosynthetic pigments, and photosynthetic performance. Cadmium treatments increased cell wall thickness and the accumulation of plastoglobuli. Destruction of chloroplast internal organization was observed. Compared to controls, algae exposed to cadmium showed growth rate reduction, depigmentation, and blending in the lateral branches. The content of photosynthetic pigments, including chlorophyll a and phycobiliproteins, decreased after exposure to different concentrations of cadmium. These results agree with the decreased photosynthetic performance and relative electron transport rate observed after exposure of algae to cadmium. Taken together, these findings strongly indicate that cadmium negatively affects the architecture and metabolism of the carragenophyte H. musciformis, thus posing a threat to the economic vitality of this red macroalgae.

show abstract

Conservation of Mediterranean habitats and biodiversity countdowns: what information do we really need?

Fraschetti

Guarnieri

Bevilacqua

et al. 2011

Aquatic Conservation

View full text Add to dashboard Cite

ABSTRACT1. The relentless increase in both human activities and exploitation of marine resources is a threat to marine habitats and species.2. For marine systems, several protection initiatives have been outlined over the past decade to significantly reduce the current rate of biodiversity loss at global, regional, and national levels, and to establish representative networks of marine protected areas with the aim of protecting 10-30% of marine habitats.3. Reliable estimates of the total area occupied by each habitat are crucial to set adequate protection initiatives. Habitat mapping requires a sound habitat classification. Many classification schemes have been developed in different areas of the world, sometimes based on questionable criteria.4. A critical analysis of the most recent marine habitat classification list produced for the Mediterranean Sea from the Regional Activity Centre for Specially Protected Areas (RAC/SPA) showed that (i) 39% of habitats and associated species considered in the list are scarcely covered by scientific knowledge from Web-based resources; (ii) 62% of the species/genera included in the list are primary producers; (iii) quantitative information about the geographical distribution of selected habitats and associated species is scant; and (iv) when available, information is largely unbalanced and biased towards the shallow western Mediterranean Sea.5. Improved inventories of marine habitats are needed to support accurate and consistent mapping activities. The combination of large-scale mapping and sound habitat classifications will allow better estimates of biodiversity distribution, to reverse regional/global habitat loss rates through the achievement of conservation targets and deadlines that, for the moment, are systematically not met.

show abstract

The effects of zinc, copper and cadmium on the fine structure of Ceramium ciliatum (Rhodophyceae, Ceramiales)

Cited by 25 publications

References 35 publications

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)

Influences of cadmium on fine structure and metabolism of Hypnea musciformis (Rhodophyta, Gigartinales) cultivated in vitro

Conservation of Mediterranean habitats and biodiversity countdowns: what information do we really need?

Contact Info

Product

Resources

About

The effects of zinc, copper and cadmium on the fine structure of Ceramium ciliatum (Rhodophyceae, Ceramiales)

Cited by 25 publications

References 35 publications

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte &lt;i&gt;Gracilaria domingensis&lt;/i&gt; (Rhodophyta, Gracilariales)

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte &lt;i&gt;Gracilaria domingensis&lt;/i&gt; (Rhodophyta, Gracilariales)

Influences of cadmium on fine structure and metabolism of Hypnea musciformis (Rhodophyta, Gigartinales) cultivated in vitro

Conservation of Mediterranean habitats and biodiversity countdowns: what information do we really need?

Contact Info

Product

Resources

About

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)

Effects of Cadmium on Growth, Photosynthetic Pigments, Photosynthetic Performance, Biochemical Parameters and Structure of Chloroplasts in the Agarophyte <i>Gracilaria domingensis</i> (Rhodophyta, Gracilariales)