Differential responses ofAzolla microphylla Kaulf andAzolla filiculoides Lam. to lead nitrate |
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Authors: | Wamy Eyini Muthukumaras Natesan Anjana Devi Chinnathambi Pothiraj Muthukrishnan Jayakumar Bong -Seop Kil |
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Institution: | (1) Research Centre in Botany, Thiagarajar College (Autonomous), 625 009 Madurai, India;(2) Research Department of Botany, VHNSN College, 626 001 Virudhunagar, India;(3) Division of Life Science, Wonkwang University, 570-749 Iksan, Korea |
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Abstract: | The aquatic fernAzolla is used as a green manure for rice production systems in warm temperate and tropical regions throughout the world. We used
lead nitrate in nutrient media to assess the tolerance/response of twoAzolla microphylla andAzolla filiculoides to heavy metals. While both species showed negative responses in growth with an increase in lead concentrations, They were
distinctly different in their tolerance for higher concentration of the heavy metal. This was apparent in their growth and
biochemical characteristics. Amicrophylla was more tolerant of the higher concentrations of lead nitrate (25 and 50 ppm), whereasA. filiculoides had a higher rate of lead uptake. |
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Keywords: | aquatic fern Azolla filiculoides Azolla microphylla green manure heavy metals |
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