NDLI: Effects of cadmium metal on young gametophytes of Gelidium floridanum: metabolic and morphological changes

Content Provider	Springer Nature Link
Author	Simioni, Carmen Schmidt, Éder C. Rover, Ticiane Santos, Rodrigo P. Filipin, Elisa Pereira, Debora T. Costa, Giulia Burle Oliveira, Eva Regina Chow, Fungyi Ramlov, Fernanda Ouriques, Luciane Maraschin, Marcelo Bouzon, Zenilda L.
Copyright Year	2015
Abstract	By evaluating carotenoid content, photosynthetic pigments and changes in cellular morphology, growth rates, and photosynthetic performance, this study aimed to determine the effect of cadmium (Cd) on the development of young gametophytes of Gelidium floridanum. Plants were exposed to 7.5 and 15 μM of Cd for 7 days. Control plants showed increased formation of new filamentous thallus, increased growth rates, presence of starch grains in the cortical and subcortical cells, protein content distributed regularly throughout the cell periphery, and intense autofluorescence of chloroplasts. On the other hand, plants treated with Cd at concentrations of 7.5 and 15 μM showed few formations of new thallus with totally depigmented regions, resulting in decreased growth rates. Plants exposed to 7.5 μM Cd demonstrated alterations in the cell wall and an increase in starch grains in the cortical and subcortical cells, while plants exposed to 15 μM Cd showed changes in medullary cells with no organized distribution of protein content. The autofluorescence and structure of chloroplasts decreased, forming a thin layer on the periphery of cells. Cadmium also affected plant metabolism, as visualized by a decrease in photosynthetic pigments, in particular, phycoerythrin and phycocyanin contents, and an increase in carotenoids. This result agrees with decreased photosynthetic performance and chronic photoinhibition observed after treatment with Cd, as measured by the decrease in electron transport rate. Based on these results, it was concluded that exposure to Cd affects cell metabolism and results in significant toxicity to young gametophytes of G. floridanum.
Starting Page	1347
Ending Page	1359
Page Count	13
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	252
Issue Number	5
e-ISSN	16156102
Language	English
Publisher	Springer Vienna
Publisher Date	2015-02-10
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gelidium floridanum Confocal microscopy Photosynthetic performance Photosynthetic pigments Carotenoids Scanning electron microscopy Cell Biology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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