NDLI: Growth and Lead Accumulation Capacity of Lemna minor and Spirodela polyrhiza (Lemnaceae): Interactions with Nutrient Enrichment (2009)

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Growth and Lead Accumulation Capacity of Lemna minor and Spirodela polyrhiza (Lemnaceae): Interactions with Nutrient Enrichment (2009)

Content Provider	CiteSeerX
Author	Aksoy, Ahmet Aksoy, A. Leblebici, Z. Leblebici, Zeliha
Abstract	Abstract A study to understand the biological effects of samples prepared with lead and the effects of lead were conducted on Lemna minor L. and Spirodela polyrhiza (L.) Schleid. This study was intended to test the hypothesis that nutrient enrichment (P, NO3 − –N and SO4 2 − ) enhances the metal tolerance of floating macrophytes. The plants were exposed to Pb concentrations 0, 1, 5, 10, 25, and 50 mg l −1 for a period of 1, 3, 5, and 7 days. L. minor accumulated 561 mg g −1 dry weight (dw) Pb, and S. polyrhiza accumulated 330mgg −1 dw Pb after 7 days, whereas in the groups enriched with nutrients, L. minor accumulated 128.7 mg g −1 Pb and S. polyrhiza accumulated 68.7 mg g −1 dw Pb after 7 days. Relative growth rates and photosynthetic pigments (chlorophyll a, b, and carotenoid) were measured in L. minor and S. polyrhiza exposed to different Pb concentrations under laboratory conditions. Relative growth rates were negatively correlated with metal exposure, but nutrient addition was found to suppress this effect. Photosynthetic pigment levels were found negatively correlated with metal exposure, and nutrient addition attenuated chlorophyll decrease in response to metal exposure. Metal and nutrient concentration in water decreased throughout the experiments. The study concluded that nutrient enrichment increases the tolerance of L. minor and S.
File Format	PDF
Publisher Date	2009-01-01
Access Restriction	Open
Subject Keyword	Photosynthetic Pigment Level Biological Effect Different Pb Concentration Spirodela Polyrhiza Metal Exposure Chlorophyll Decrease Metal Tolerance Dry Weight Dw Pb Pb Concentration Laboratory Condition Nutrient Addition Nutrient Enrichment Water Air Soil Pollut Lemna Minor Lead Accumulation Capacity S11270-010-0413-1 Growth Relative Growth Rate Nutrient Concentration Photosynthetic Pigment
Content Type	Text

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