The Morphophysiological Responses of Free-Floating Aquatic Macrophytes to a Supra-optimal Supply of Manganese

Lizieri, Claudineia; Kuki, Kacilda Naomi; Aguiar, Rosane Moura

doi:10.1007/s11270-011-1068-2

Cited by 13 publications

(4 citation statements)

References 55 publications

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“…More specifically, for Mn, peroxidase activity on protein basis in both leaves and roots increased with increasing doses of Mn in soybean plants in spite of significant growth inhibition and visual toxicity symptoms [28]. In addition, peroxidase activity did not change as a result of growth-inhibiting dose of Mn in Spirodela polyrhiza plants, while catalase activity decreased significantly [36]. However, in Polygonum hydropiper plants, both peroxidase and catalase activity showed maximum levels at moderate Mn doses and decreased further [37].…”

Section: Discussionmentioning

confidence: 93%

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Comparison of the Effects of Gradual and Acute Treatment with Mn on Physiological Responses of Rumex hydrolapathum Plants

Samsone,

Ievinsh

2024

Stresses

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An understudied problem in plant heavy metal biology is the effects of acute versus gradual or chronic metal exposure. The aim of the present study was to compare the growth and physiological responses of Rumex hydrolapathum Huds. plants subjected to gradual or acute Mn stress treatment in controlled conditions. Heavy metal was applied to substrate either as one 1.00 g L−1 Mn dose (acute treatment) or the same dose in four steps of increasing amounts within 12 days (gradual treatment). Peroxidase activity in actively photosynthesizing leaves was used for monitoring induced biochemical changes resulting from Mn treatment. The number of leaves per plant significantly increased in the case of gradual treatment with Mn, but this effect was not statistically significant for acute treatment. Leaf fresh mass significantly decreased in both cases due to the decrease in leaf water content, but dry biomass of leaves was not affected, with no significant differences between the two types of treatments. A significantly lower chlorophyll fluorescence parameter Performance Index in large leaves of plants under the acute Mn treatment than in plants under the gradual treatment was evident. An increase in leaf peroxidase activity by Mn treatment was proportional to the metal dose received, but plants in the acute treatment with 1.00 g L−1 Mn had a significantly lower peroxidase response in comparison to the gradual treatment with 1.00 g L−1 Mn. In conclusion, under gradual treatment, biochemical changes related to the induction of tolerance to the heavy metal are expressed, as indicated by the continuous increase in leaf peroxidase activity after each treatment step.

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Section: Discussionmentioning

confidence: 93%

“…Usually, these two parameters show a parallel and proportional increase with the increase in the harmful effect of heavy metals [35]. In addition, a decrease in photosynthesis-related parameters is often used as an indicator of heavy-metal-associated physiological disorders, including those of Mn [36,37].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Effects of Gradual and Acute Treatment with Mn on Physiological Responses of Rumex hydrolapathum Plants

Samsone,

Ievinsh

2024

Stresses

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“…Among heavy metals, the annual average global release of copper (Cu) in different environmental components is about 939,000 metric tons [10]. Copper as a micronutrient is required for plant, animal, and human health; however, the same element can accumulate to high concentrations in living organisms and may potentially cause ecological damage [11,12]. Plant growth is also affected due to its toxic effects on their metabolic and developmental processes mainly due to photosynthetic inhibition, necrosis, chlorosis of leaves, hindrance in nutrient acquisition, and transport mechanisms [13,14].…”

Section: Introductionmentioning

confidence: 99%

Interspecific Variability in Growth Characteristics and Phytoremediation of Cu by Free-Floating Azolla Macrophytes

et al. 2022

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The phytoremediation potential of aquatic plants, particularly for Cu, is scarcely reported in the pertinent literature. In this regard, differential growth behavior and phytoaccumulation ability of three free-floating Azolla species (A. japonica, A. pinnata, and A. hybrid) were evaluated in a climatically controlled (a temperature of 25/20 °C, light/dark 16/8 h, a light intensity of 60 µmol m−2 s−1, and a relative humidity of 65%) microcosm study. Azolla plants were exposed to solutions having three Cu concentrations (0, 3, and 6 mg L−1) under two incubation periods (4 and 8 days). Different Cu treatments significantly reduced Azolla biomass during both incubation periods and A. pinnata was the most sensitive species. Azolla plants grown in aqueous solutions showed substantial variations in Cu removal capacity. Higher bioconcentration values displayed by Azolla plants indicated that these plants can be deployed as potential plants for Cu removal from Cu contaminated water. Nevertheless, the plants exposed to higher Cu concentrations displayed color changes and root detachment due to Cu phytotoxic effects which may also ultimately lead to plant death. Significant correlations between Cu removed from the aqueous solutions and Cu contents of plant biomass indicated that Cu phytoremediation by Azolla plants was due to the phytoaccumulation mechanism because the removed Cu from aqueous solutions was accumulated in plant biomass. Introduced Azolla species, i.e., A. hybrid, displayed comparable Cu removal efficiency with naturally grown Azolla species, i.e., A. japonica and A. pinnata. Tested Azolla species proved to be suitable candidates to remediate Cu contaminated water and can be deployed for phytoremediation.

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“…Cavas and Yurdakoc (2005) assessed the antioxidant system in the invasive green alga Caulerpa racemosa and some macrophytes from the Mediterranean. Lizieri et al (2012) studied the morpho-physiological responses of free-floating aquatic macrophytes to a supra-optimal supply of manganese. Rout and Shaw (2000a, 2000b studied the solt tlarence of aquatic macrophytes and the possible involvement of the antioxidant enzymes on them.…”

Section: Introductionmentioning

confidence: 99%

Oxidative response of wetland macrophytes in response to contaminants of abiotic components of East Kolkata wetland ecosystem

Pal

Mondal²,

Bhar

et al. 2014

Limnological Review

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The tannery effluent and composite municipal sewage water drained to the East Kolkata wetland (EKW), a Ramsar Site (1208), is used for agriculture and pisciculture after natural stabilization. Such composite wastewater is characterized by exceedingly high total dissolved solids, total hardness, chloride and heavy metals concentrations. These water born pollutants generate reactive oxygen species which are potentially toxic to the biological system. These reactive oxygen species are normally detoxified by some enzymes, such as superoxide dismutase (SOD) and catalase (CAT). The present study was commenced to find out the SOD and CAT activities against the oxidative stress, if any, in four macrophytes namely, Eichhornia crassipes, Pistia stratiotes, Alternanthera sessilis and Sagittarria montevidensis of contaminated ponds (Site 1 and Site 2) of EKW and an uncontaminated site (Control site). During the course of sampling the physico-chemical factors were found significantly higher in the EKW ponds compared to the control site. In the EKW sites, higher rate of evaporation during summer months caused higher elemental concentration in the premonsoon than in other seasons. This led to high activity of both SOD and CAT enzymes. In contrast, heavy rain fall in monsoon lowers the elemental concentration - mainly due to dilution effect. Present experiment indicated that in a stressed ecosystem like EKW, the wetland plants overcome the stress by altering their stress enzyme activities, hence suggesting an evidence of adaptive mechanism to thrive in a stressful environment.

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The Morphophysiological Responses of Free-Floating Aquatic Macrophytes to a Supra-optimal Supply of Manganese

Cited by 13 publications

References 55 publications

Comparison of the Effects of Gradual and Acute Treatment with Mn on Physiological Responses of Rumex hydrolapathum Plants

Comparison of the Effects of Gradual and Acute Treatment with Mn on Physiological Responses of Rumex hydrolapathum Plants

Interspecific Variability in Growth Characteristics and Phytoremediation of Cu by Free-Floating Azolla Macrophytes

Oxidative response of wetland macrophytes in response to contaminants of abiotic components of East Kolkata wetland ecosystem

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