Ammonium, microcystins, and hypoxia of blooms in eutrophic water cause oxidative stress and C–N imbalance in submersed and floating-leaved aquatic plants in Lake Taihu, China

Zhang, Meng; Wang, Zhengqi; Xu, Jun; Liu, Yaqin; Ni, Leyi; Cao, Ting; Xie, Ping

doi:10.1016/j.chemosphere.2010.10.038

Cited by 65 publications

(43 citation statements)

References 87 publications

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“…At a first glance, the net NH 4 + leakage from M. spicatum and C. demersum in the present study seems inconsistent with the accumulation of NH 4 + and free amino acids (FAA) in many submersed macrophytes under moderate NH 4 + stress (Smolders et al 1996, Cao et al 2004, 2009, 2011, Zhang et al 2011). However, it is possible that such contradictory processes could occur simultaneously because intracellular NH 4 + and FAA can also be generated from degradation of proteins and transport of NH 4 + out of the plant cell, which may happen when plants are under severe NH 4 + stress (Jackson et al 1993, Britto & Kronzucker 2002.…”

Section: Discussioncontrasting

confidence: 65%

“…Compared with M. spicatum, C. demersum had higher net NH 4 + absorption at the medium NH 4 + concentrations and lower net NH 4 + leakage at the high NH 4 + concentrations in the present study, implying that C. demersum was more effective in transporting NH 4 + across the membrane. These results, together with the lower FAA accumulations of C. demersum under NH 4 + stress (Cao et al 2011), demonstrate that the higher membrane permeability of C. demersum allows greater transport of NH 4 + out of the plant cell, which consequently decreases NH 4 + and FAA accumulation. This supports the futile NH 4 + cycling hypothesis of NH 4 + toxicity proposed by Britto et al (2001).…”

Section: Discussionmentioning

confidence: 65%

“…The threshold NH 4 + concentrations for M. spicatum and C. demersum were higher than those reported for other taxa, e.g. 0.35, 0.5, 0.56 and 1 mg l −1 NH 4 + -N were toxic to the submersed macrophytes Zostera marina, Potamogeton maackianus, Vallisneria natans and Elodea Canadensis, respectively (Dendene et al 1993, van Katwijk et al 1997, Cao et al 2007, Li et al 2007), but still fall within the range of NH 4 + concentrations of many eutrophic lakes (Jin 2003, Jin et al 2005, Wu et al 2006, Cao et al 2007, Zhang et al 2011). Rolando Quirós (2003 demonstrated that NH 4 + -N concentrations are closely related to the TN levels in lakes.…”

Section: Discussionmentioning

confidence: 96%

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Growth and membrane permeability of two submersed macrophytes in response to ammonium enrichment

Zhong¹,

Cao²,

Ni³

et al. 2013

Aquat. Biol.

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Section: Discussioncontrasting

confidence: 65%

Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 96%

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Growth and membrane permeability of two submersed macrophytes in response to ammonium enrichment

Zhong¹,

Cao²,

Ni³

et al. 2013

Aquat. Biol.

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confidence: 99%

Composition of Ethyl Acetate Extracts from Three Plant Materials (Shaddock Peel, Pomegranate Peel, Pomegranate Seed) and Their Algicidal Activities

Wang¹,

Kang²,

Zhang³

et al. 2015

Pol. J. Environ. Stud.

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Eutrophication is a worldwide problem in aquatic ecosystems and cyanobacterial blooms can cause severe water quality deterioration due to toxin production, hypoxia, off-flavor problems that lead to illness in animals and humans [1][2][3]. Therefore, the removal of harmful cyanobacterial blooms is a crucial step for the maintenance of safe water supplies and for the safety of aquatic products [4]. Recent years have seen many studies relating to the isolation and identification of allelochemicals from aquatic plants [5][6][7][8], while the algicidal properties of terrestrial plants still get less attention [9]. Up to now, the extracts of many terrestrial plants also show inhibitory effects against cyanobacteria, such as barley straw [10][11][12][13], Chinese traditional medicines [9,14,15], and so on.Pomegranate (Punicagranatum), belonging to the family Punicaceae [16], is one of the oldest edible fruits. It has been cultivated extensively in Mediterranean countries, Iran, India, and to some extent in the U.S. (California), China, Japan, and Russia [17]. Pomegranate peels and seeds Pol. J. Environ. Stud. Vol. 24, No. 4 (2015), 1803-1807 AbstractMany studies have involved the isolation and identification of allelochemicals from aquatic plants, but the algicidal properties of terrestrial plants have received less attention. This study aims to identify allelochemicals of ethyl acetate extracts from three plant materials (shaddock peel, pomegranate peel, pomegranate seed) and to investigate their inhibitory effects on Microcystis aeruginosa. The ethyl acetate extracts of the three plant materials were identified by GC-MS. Finally, 19 kinds of compounds (including organic acids, ester, ketone, sterol, etc.) were obtained and eight kinds of organic acids and N-phenyl-2-Naphthalenamine were proved to be allelochemicals. The inhibitory effects of the ethyl acetate extracts were also explored by M. aeruginosa bioassay. This showed that the inhibition percentages of ethyl acetate extracts of the three plant materials on the growth of M. aeruginosa were 43.9%, 47.5%, and 40.3%, respectively, when the algae were treated at a dosage of 20 mg/L extracts.Keywords: allelopathic effect, shaddock peel, pomegranate peel, pomegranate seed, Microcystis aeruginosa *e-mail: zhanglieyu@163.com **e-mail: shpcheng@foxmail.com DOI: 10.15244/pjoes/36986 as a byproduct of pomegranate processing are about 26-30%, 20% (w/w) of the whole fruit weight, respectively [18,19], and are a good source of secondary products such as tannins, organic acid, polyphenol, and alkaloids [20][21][22]. Shaddock, like other citrus fruits, has a small edible portion and large amounts of waste materials such as peels and seeds, and peels contain considerable phenolic compounds [23]. At present, the polyphenols have shown significant inhibition to the growth of harmful algae. Therefore, these previous results indicate that the shaddock peel, pomegranate peel, and pomegranate seed could be used as an algicide.The objectives of this study are to identify the alle...

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“…meneghiniana at high nitrate levels (Zhang et al, 2013). Ammonium levels in Lake Taihu increased in spring along with high TN levels (Zhang et al, 2011). The dominance of C .…”

Section: Discussionmentioning

confidence: 99%

Changes in phytoplankton communities along nutrient gradients in Lake Taihu: evidence for nutrient reduction strategies

2014

Chin. J. Ocean. Limnol.

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An annual investigation on phytoplankton communities was conducted to reveal the effects of nutrients on phytoplankton assemblages in Lake Taihu, East China. A total of 78 phytoplankton taxa were identifi ed. Phytoplankton biomass was higher in the northern part of the lake than in the southern part. Cyanobacteria and Bacillariophyta alternated dominance in the northern area, where algal blooms often appear, and co-dominated in the southern area. In the northern part, the proportions of cyanobacteria and Bacillariophyta varied signifi cantly in total biovolume, both along the phosphorus (P) gradient, and between total nitrogen levels (≤3 mg/L and >3 mg/L TN). The proportions of cyanobacteria and Bacillariophyta had no signifi cant variations in total biovolume along P and N (nitrogen) gradients in the southern part. Correlation analysis and CCA results revealed that P was the key factor regulating phytoplankton community structure. Nitrogen was also important for the phytoplankton distribution pattern. It was concluded that nutrient structure was heterogeneous in space and shaped the distribution pattern of phytoplankton in the lake. Both exogenous P and internally sourced P release needs to be considered. N reduction should be considered simultaneously with P control to effi ciently reduce eutrophication and algal blooms.

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Ammonium, microcystins, and hypoxia of blooms in eutrophic water cause oxidative stress and C–N imbalance in submersed and floating-leaved aquatic plants in Lake Taihu, China

Cited by 65 publications

References 87 publications

Growth and membrane permeability of two submersed macrophytes in response to ammonium enrichment

Growth and membrane permeability of two submersed macrophytes in response to ammonium enrichment

Composition of Ethyl Acetate Extracts from Three Plant Materials (Shaddock Peel, Pomegranate Peel, Pomegranate Seed) and Their Algicidal Activities

Changes in phytoplankton communities along nutrient gradients in Lake Taihu: evidence for nutrient reduction strategies

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