Lemna is a free- floating aquatic plant from the duckweed family, that consists of small, individual thalli (Tkalec et.al, 2001). Lemna are small, fast growing plants and they develop dense mats on ponds, especially when enough light and nutrients are available (Gérard et.al, 2014). Salt is the most toxic substance, as it causes an inhibition of plant growth and a decrease in nutrient uptake (Chang et.al, 2012). Salt stress induces the production of abscisic acid (ABA), a plant stress hormone, which closes stomata when transported to guard cells, and, in turn, results in the decline of photosynthesis (Chang et.al, 2012). Inappropriate irrigation,industrial discharge, biological waste decomposition, and surface runoff can cause increased levels
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2002). In addition, Lemna with a high phosphorous concentration flourished, while those without phosphorus became weaker (Gérard et.al, 2014). The reduction of phosphorus had negative impacts on the growth rates of lemna (Gérard et.al, 2014). The total biomass of the plants grown in high phosphorus concentrations was higher than the total biomass of the species grown in low phosphorus concentrations (Henry- Silva et.al, 2008). The addition of salt inhibits plant growth and the addition of phosphorus will increase plant growth. The combination of salinity and phosphorous hinders the growth of lemna plants. Will the encounter of such pollutants cause immediate death in the lemna plants or, solely weaken their health and ability to obtain vital nutrients? Or will the addition of phosphorous enable the plants to have a more positive growth …show more content…
This result was expected due to the negative impacts of salt on plants, such as decreased rates of photosynthesis. The plants treated with phosphorus alone exhibited similar growing habits as the plants in the control group. The similarities between the two groups show that the phosphorus does not have an impact on the growth of the Lemna plants. Plants treated with both salt and phosphorus resulted in more thalli than those only treated with salt. There was a smaller decrease in the growth of the plant, in comparison with the addition of the salt alone. The addition of phosphorus seemed to negate some of the detrimental effects of salinity. By comparing these values for Lemna treated with phosphorus and Lemna treated with both phosphorus and salt, it is concluded that although phosphorus did not completely negate the effects of salt, phosphorus was still able to aid some of the Lemna to continue to grow. Although, no research has examined the effects of both phosphorus and salinity, phosphorus has been proved to increase the growth of plants (Henry- Silva et.al, 2008). The findings of this study support the previous studies, as the addition of phosphorus did not inhibit the growth of Lemna, while the addition of NaCl stunted the growth of Lemna.
To expand this study, further research should be conducted with the addition of salt and phosphorus together. Different amounts of salt
2002). In addition, Lemna with a high phosphorous concentration flourished, while those without phosphorus became weaker (Gérard et.al, 2014). The reduction of phosphorus had negative impacts on the growth rates of lemna (Gérard et.al, 2014). The total biomass of the plants grown in high phosphorus concentrations was higher than the total biomass of the species grown in low phosphorus concentrations (Henry- Silva et.al, 2008). The addition of salt inhibits plant growth and the addition of phosphorus will increase plant growth. The combination of salinity and phosphorous hinders the growth of lemna plants. Will the encounter of such pollutants cause immediate death in the lemna plants or, solely weaken their health and ability to obtain vital nutrients? Or will the addition of phosphorous enable the plants to have a more positive growth …show more content…
This result was expected due to the negative impacts of salt on plants, such as decreased rates of photosynthesis. The plants treated with phosphorus alone exhibited similar growing habits as the plants in the control group. The similarities between the two groups show that the phosphorus does not have an impact on the growth of the Lemna plants. Plants treated with both salt and phosphorus resulted in more thalli than those only treated with salt. There was a smaller decrease in the growth of the plant, in comparison with the addition of the salt alone. The addition of phosphorus seemed to negate some of the detrimental effects of salinity. By comparing these values for Lemna treated with phosphorus and Lemna treated with both phosphorus and salt, it is concluded that although phosphorus did not completely negate the effects of salt, phosphorus was still able to aid some of the Lemna to continue to grow. Although, no research has examined the effects of both phosphorus and salinity, phosphorus has been proved to increase the growth of plants (Henry- Silva et.al, 2008). The findings of this study support the previous studies, as the addition of phosphorus did not inhibit the growth of Lemna, while the addition of NaCl stunted the growth of Lemna.
To expand this study, further research should be conducted with the addition of salt and phosphorus together. Different amounts of salt