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Effect of different temperature fluctuations and different initial concentrations of NO<sub>3</sub>-N and PO<sub>4</sub>-P on growth, nutrient uptake and photosynthetic efficiency of <i>Gracilaria asiatica</i>

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Title Effect of different temperature fluctuations and different initial concentrations of NO3-N and PO4-P on growth, nutrient uptake and photosynthetic efficiency of Gracilaria asiatica
 
Creator Wedchaparn, Oranich
Ayisi, Christian Larbi
Huo, Yuanzi
He, Peimin
 
Subject Gracilaria
Temperature fluctuations
Nutrient uptake rate
Nutrient concentrations
Photosynthetic efficiency
 
Description 1128-1134
The effects of three temperature fluctuations combined with different initial NO3-N and PO4-P concentrations on growth rate, nutrient uptake as well as photosynthetic efficiency were assessed. Gracilaria asiatica were collected from the coast of Fujian, China for this present study. Study revealed that after 15 days, the highest growth rate of G. asiatica was recorded at 20ºC under low initial nutrient concentration whiles the lowest was recorded at 25ºC under high initial nutrient concentration. The NO3-N uptake rate of G. asiatica under low and high initial concentration at temperatures 20ºC and 20±2ºC were higher than other conditions after 15 days. On the other hand the PO3-P uptake rate under high initial concentration at temperatures 20ºC and 20±2ºC were lower than other conditions after 15 days. After the third day, NO3-N and PO4-P were exhausted from the medium when the initial concentration were low under different temperature fluctuations. Photosynthetic efficiency observed at temperatures 15ºC and 15±2ºC decreased from beginning whiles the photosynthetic efficiency at 25ºC and 25±2ºC increased from beginning. We concluded that temperature fluctuations integrated with different initial NO3-N and PO4-P concentrations affects growth rate, nutrient uptake as well as photosynthetic efficiency of G. asiatica.
 
Date 2017-05-29T10:08:34Z
2017-05-29T10:08:34Z
2017-06
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/42011
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.46(06) [June 2017]