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פותח על ידי קלירמאש פתרונות בע"מ -
Phenols and phenol oxidases are involved in cadmium accumulation in the water plants Nymphoides peltata (Menyanthaceae) and Nymphaeae (Nymphaeaceae)
Year:
2001
Source of publication :
Planta
Authors :
לוינסון, אפרים
;
.
Volume :
214
Co-Authors:
Lavid, N., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Schwartz, A., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Lewinsohn, E., Newe-Ya'ar Research Center, ARO, P.O. Box 1021, Ramat-Yishay, Israel
Tel-Or, E., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Facilitators :
From page:
189
To page:
195
(
Total pages:
7
)
Abstract:
This comparative study investigates the mechanism of cadmium accumulation in the semiaquatic plant Nymphoides peltata (Menyanthaceae) and the aquatic plant Nymphaea (Nymphaeaceae). It was conducted as part of an ongoing study of the use of water plants for phytoremediation. Epidermal structures, known as hydropotes, are located on the abaxial epidermis of the leaf laminae of Nymphoides peltata and are shown to contain phenols, peroxidase and polyphenol oxidase activities. When plants are subjected to 50 mg/1 of cadmium in the growth medium, these hydropotes accumulate cadmium. Cadmium-induced increases in phenols, peroxidase and polyphenol oxidase activities were determined in plant extracts. Cadmium binding by polymerized phenols was demonstrated in vivo. In comparison with Nymphaeae epidermal glands, N. peltata hydropotes are larger, open, and create bigger crystals, the latter principally composed of calcium and, proportionally, less cadmium. Although both plants showed similar levels of cadmium accumulation, N. peltata was sensitive while Nymphaeae was resistant to this cadmium level. It is suggested that in these water plants the main mechanism for cadmium accumulation is based on the trapping of cadmium crystals by polymerized phenols in specialized epidermal structures and this is due to peroxidase and polyphenol oxidase activities. Nymphaeae, with greater peroxidase activity and more polyphenols, is more resistant to this heavy metal than N. peltata.
Note:
Related Files :
Cadmium accumulation
Heavy metals
Hydropotes
Menyanthaceae
peroxidase
phenols
phytoremediation
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22632
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:53
Scientific Publication
Phenols and phenol oxidases are involved in cadmium accumulation in the water plants Nymphoides peltata (Menyanthaceae) and Nymphaeae (Nymphaeaceae)
214
Lavid, N., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Schwartz, A., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Lewinsohn, E., Newe-Ya'ar Research Center, ARO, P.O. Box 1021, Ramat-Yishay, Israel
Tel-Or, E., Department of Agricultural Botany, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Phenols and phenol oxidases are involved in cadmium accumulation in the water plants Nymphoides peltata (Menyanthaceae) and Nymphaeae (Nymphaeaceae)
This comparative study investigates the mechanism of cadmium accumulation in the semiaquatic plant Nymphoides peltata (Menyanthaceae) and the aquatic plant Nymphaea (Nymphaeaceae). It was conducted as part of an ongoing study of the use of water plants for phytoremediation. Epidermal structures, known as hydropotes, are located on the abaxial epidermis of the leaf laminae of Nymphoides peltata and are shown to contain phenols, peroxidase and polyphenol oxidase activities. When plants are subjected to 50 mg/1 of cadmium in the growth medium, these hydropotes accumulate cadmium. Cadmium-induced increases in phenols, peroxidase and polyphenol oxidase activities were determined in plant extracts. Cadmium binding by polymerized phenols was demonstrated in vivo. In comparison with Nymphaeae epidermal glands, N. peltata hydropotes are larger, open, and create bigger crystals, the latter principally composed of calcium and, proportionally, less cadmium. Although both plants showed similar levels of cadmium accumulation, N. peltata was sensitive while Nymphaeae was resistant to this cadmium level. It is suggested that in these water plants the main mechanism for cadmium accumulation is based on the trapping of cadmium crystals by polymerized phenols in specialized epidermal structures and this is due to peroxidase and polyphenol oxidase activities. Nymphaeae, with greater peroxidase activity and more polyphenols, is more resistant to this heavy metal than N. peltata.
Scientific Publication
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