Ecophysiological responses of young mangrove species Rhizophora apiculata (Blume) to different chromium contaminated environments
Many
mangrove forests have suffered from the contaminated environments near
industrial areas.
This
study addresses the question how these environments influence the renewal of
mangrove forests.
To
this end ecophysiological responses of the young mangrove species Rhizophora
apiculata (Blume) grown under combinations of the factors heavy metals (here
chromium), nutrition and soil/water environment were analyzed.
We
tested the hypothesis that soil/water conditions and nutrient status of the
soil strongly influence the toxic effect of chromium.
Seedlings of R. apiculata were grown in three
different soil/water environments (natural saline soil with brackish water,
salt-leached soil with fresh water and salt-leached-sterilized soil with fresh
water) treated with different levels of chromium and NPK fertilizer.
The
system was inundated twice a day as similar to natural tidal condition in the
mangrove wetland in the south of Vietnam.
The experiments were carried out for 6 months.
Growth data of root, leaf and stem, root cell number and stomata number were
recorded and analyzed. Results showed that growth of R. apiculata is slower in
natural saline soil/water condition.
The
effect of chromium and of nutrients respectively depends on the soil/water
condition.
Under
high concentrations of chromium, NPK fertilizer amplifies the toxic effect of
chromium.
Stomata
density increases under chromium stress and is largest under the combination of
chromium and salty soil/water condition.
From
the data a nonlinear multivariate regression model was derived capturing the
toxicity threshold of R apiculata under different treatment combinations.
Title:
| Ecophysiological responses of young mangrove species Rhizophora apiculata (Blume) to different chromium contaminated environments | |
| Authors: | Nguyen Kim Linh Nguyen Hoang Anh Richter, Otto Pham Minh Thinh Nguyen Van Phuoc |
| Keywords: | Mangrove Rhizophora apiculata Chromium Nutrient Microorganism Plant growth modelling |
| Issue Date: | 2017 |
| Publisher: | ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| Citation: | ISIKNOWLEDGE |
| Abstract: | Many mangrove forests have suffered from the contaminated environments near industrial areas. This study addresses the question how these environments influence the renewal of mangrove forests. To this end ecophysiological responses of the young mangrove species Rhizophora apiculata (Blume) grown under combinations of the factors heavy metals (here chromium), nutrition and soil/water environment were analyzed. We tested the hypothesis that soil/water conditions and nutrient status of the soil strongly influence the toxic effect of chromium. Seedlings of R. apiculata were grown in three different soil/water environments (natural saline soil with brackish water, salt-leached soil with fresh water and salt-leached-sterilized soil with fresh water) treated with different levels of chromium and NPK fertilizer. The system was inundated twice a day as similar to natural tidal condition in the mangrove wetland in the south of Vietnam. The experiments were carried out for 6 months. Growth data of root, leaf and stem, root cell number and stomata number were recorded and analyzed. Results showed that growth of R. apiculata is slower in natural saline soil/water condition. The effect of chromium and of nutrients respectively depends on the soil/water condition. Under high concentrations of chromium, NPK fertilizer amplifies the toxic effect of chromium. Stomata density increases under chromium stress and is largest under the combination of chromium and salty soil/water condition. From the data a nonlinear multivariate regression model was derived capturing the toxicity threshold of R apiculata under different treatment combinations. (C) 2016 Elsevier B.V. All rights reserved. |
| Description: | TNS07038 ; SCIENCE OF THE TOTAL ENVIRONMENT Volume: 574 Pages: 369-380 Published: JAN 1 2017 |
| URI: | http://repository.vnu.edu.vn/handle/VNU_123/28909 http://www.sciencedirect.com/science/article/pii/S0048969716319829 |
| ISSN: | 0048-9697 1879-1026 |
| Appears in Collections: | Bài báo của ĐHQGHN trong Web of Science |
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