Leaf biochemical parameters in Avicennia marina (Forsk.) Vierh as potential biomarkers of heavy metal stress in estuarine ecosystems

2002 ◽  
Vol 44 (3) ◽  
pp. 244-256 ◽  
Author(s):  
G.R MacFarlane
Keyword(s):  
Heavy Metal ◽  
Biochemical Parameters ◽  
Heavy Metal Stress ◽  
Avicennia Marina ◽  
Metal Stress ◽  
Estuarine Ecosystems ◽  
Potential Biomarkers

scholarly journals Effects of Fly Ash Amended Soil on Biochemical Attributes and Antioxidant Responses of Medicinally Potent Plant Calendula Officinalis

2021 ◽  
Author(s):  
Ayushi Varshney ◽  
Praveen Dahiya ◽  
Sumedha Mohan
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Antioxidant Enzyme ◽  
Biochemical Parameters ◽  
Photosynthetic Pigment ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Antioxidant Enzyme Activities ◽  
Calendula Officinalis ◽  
The Impact

Abstract Phytoremediation of fly ash (FA) deposits using metal tolerant plant species has become an important eco-friendly technique for reclamation nowadays. The present study was carried out to determine the impact of FA application on photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids), biochemical parameters (soluble protein, reducing sugar, nitrate and nitrate reductase (NR) activity), metal accumulation (Fe, Zn, Cu, Co, Cd, Cr, and Mn) and antioxidant defense activity (SOD, CAT, POD, and APX) of Calendula officinalis. With this aim in mind, under pot culture conditions, Calendula officinalis was grown in different combinations of FA and soil which include: Control, 10%, 20%, 40%, 60%, 80%, and 100% FA. The results from the study indicated that the addition of FA (40%) in soil not only improved the physico-chemical properties of soil but also increased the photosynthetic pigment and other biochemical parameters in plants, however, these parameters declined under high FA applications. On the other hand, antioxidant enzyme activities (SOD, CAT, APX and Peroxidase) of Calendula increased with increasing FA application to combat heavy metal stress from fly ash. At high FA applications, antioxidant enzyme levels increased in leaves thereby reflecting heavy metal stress and mitigation of reactive oxygen species.

scholarly journals Evaluation of Free Radical Scavenging Activities Against Multiple Heavy Metals Stress in Avicennia marina (Forsk.) and Rhizophora mucronata Lamk

2020 ◽  
Vol 11 (3) ◽  
pp. 31-38
Author(s):  
Samrina Shams ◽  
Sarwat Ismail ◽  
Muhammad Faheem Siddiqui ◽  
Samin Naurin
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Radical Scavenging ◽  
Heavy Metal Stress ◽  
Avicennia Marina ◽  
Metal Stress ◽  
Survival Strategies ◽  
Guaiacol Peroxidase ◽  
Mangrove Species ◽  
Multiple Heavy Metals

The tolerance mechanism of mangrove species (Avicennia marina (Forsk.) and Rhizophora mucronataLamk) was studied by inducing multiple heavy metal stress in roots and leaves of the plants. Mangrove seedlings weretreated with different concentrations of heavy metal solution (Cr, Cd, Pb and Hg) for a period of 2 months. Scavengingantioxidant enzymes like Polyphenol Oxidase (PPO), Glutathione-S-transferase (GSTs) and Guaiacol Peroxidase(POD) were analyzed in both species after appropriate intervals of 15 days. Results revealed that activities of theseantioxidative enzymes were altered due to multiple heavy metals exposure in both mangrove species, whereas leavesexhibited the higher values as compared to the roots. In the leaves of both mangrove plants GSTs exhibited anincreased trend throughout the investigated period whereas, PPO activity initially showed an increasing trend, butgradually decreased with the passage of time in response to heavy metal stress. Furthermore, an increased level ofantioxidants was also observed in A. marina than R. mucronata which proves that the former is a strong candidate forheavy metals phyto-remediation with its viable survival strategies.

Effects of Metal Stress on Visible/Near-Infrared Reflectance Spectra of Vegetation

2011 ◽  
Vol 347-353 ◽  
pp. 2735-2738 ◽  
Author(s):  
Guang Yu Chi ◽  
Yi Shi ◽  
Xin Chen ◽  
Jian Ma ◽  
Tai Hui Zheng
Keyword(s):  
Heavy Metal ◽  
Structural Changes ◽  
Near Infrared ◽  
Leaf Surface ◽  
Spectral Response ◽  
Spectral Characteristics ◽  
Surface Characteristics ◽  
Heavy Metal Stress ◽  
Metal Stress ◽  
Near Infrared Reflectance

Vegetation which suffers from heavy metal stresses can cause changes of leaf color, shape and structural changes. The spectral characteristics of vegetation leaves is related to leaf thickness, leaf surface characteristics, the content of water, chlorophyll and other pigments. So the eco-physiology changes of plants can be reflected by spectral reflectance. Studies on the spectral response of vegetation to heavy metal stress can provide a theoretical basis for remote sensing monitoring of metal pollution in soils. In recent decades, there are substantial amounts of literature exploring the effects of heavy metals on vegetation spectra.

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