Availability and transferring of phosphorus forms by Hydrilla verticillata in the sediment and soil

Zhao, Haichao; Wang, Shengrui; Jin, Xin; Bu, Qingyun; Liu, Jinghui

doi:10.18307/2008.0308

Cited by 2 publications

(1 citation statement)

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“…Pistia stratiotes is a perennial floating water herb, which grows easily and has a strong capacity to purify sewage and effectively improve eutrophic water quality [19,20]. Hydrilla verticillata, commonly called as seagrass, can transform the phosphorus present in a wetland substrate into its available state and is capable of purifying water quality in a eutrophic sewage [21,22]. As the root parts in the sediment submerged aquatic plants completely, the flood water and soil should be adopted from an environment closer to the original ecological environment, but the flooded soil cultivation method should be used to collect the root secretion solution, containing the inclusions and the bleeding xylem sap of the root system itself; due to a big error in the root secretion analysis, hydroponics can avoid the plant roots injury effectively, not including plant roots itself [23,24], Cyperus alternifolius is a kind of widely distributed wetland hydrophyte, which survives easily and has a great effect on wetland management.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the root exudate release system of typical plants in plateau lakeside wetland under phosphorus stress conditions

Zhao

Zhang

2020

Open Chemistry

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AbstractIn this study, the root exudates of wetland plants, Pistia stratiotes, black algae, and Cyperus alternifolius, exposed to six phosphorus concentration gradients (0, 0.2, 1, 5, 10, and 20 mg/L) were characterized. The experimental seedlings were cultivated in Hoagland solutions, which were then extracted, decompressed, and concentrated with CH2Cl2; subsequently, a gas chromatography-mass spectrometry (GC-MS) analysis was performed to study the root exudates effects under different phosphorus concentrations. Results showed the existence of several organic compounds, such as alkanes, esters, alcohols, amines, benzene, and acids (phthalic acid, cycloheptasiloxane, benzoic acid, and cyclopentasiloxane) in the root exudates of the wetland plants. The relative contents of phthalate, benzene dicarboxylic acid, and cyclohexasiloxane in the root exudates first increased, and then decreased, with the change in phosphorus concentration. The relative contents of three compounds in Pistia were the highest at 1 mg/L of phosphorus, and the lowest relative contents of phthalic acid and benzene dicarboxylic acid were observed at 20 mg/L of phosphorus. However, the relative content of cyclohexasiloxane was the lowest in the absence of P stress. In black algae, the relative contents of the three compounds were 36.66, 16.24, and 14.61%, respectively. The relative content of cyclohexasiloxane in the black algae first decreased and then increased, with its lowest relative content occurring at 5 mg/L of phosphorus and the highest at 10 mg/L of phosphorus. In Cyperus alternifolius, the highest relative concentrations of the four compounds: phthalic acid, dimethyl phthalate, octadecane, and diphenyl sulfone in Cyperus were observed at 5 mg/L phosphorus and the lowest at 10 mg/L phosphorus.