Journal of Wetland Ecobiology
Volume 16, Issue 1 (Spring 2024)
2024, 16(1): 59-67 |
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The investigation of proportion of (N/P) in the growth and pigments of Chaetoceros calcitrans. Wetland Ecobiology 2024; 16 (1) : 6
URL: http://jweb.ahvaz.iau.ir/article-1-1135-en.html
URL: http://jweb.ahvaz.iau.ir/article-1-1135-en.html
Abstract: (270 Views)
Microalgae are among the most effective primary producers in marine ecosystems and play a key role in the cycles of nutrients. The proportion of nitrogen to phosphorus (N:P) is one of the prominent determining factors in the growth and synthesis of photosynthesis pigments in these micro-organisms. The present study aims to determine the ideal nitrogen-phosphorus proportion in the growth and production of pigments in Chaetoceros calcitrans. The experiment was conducted over a 15-day period under controlled conditions with light intensity of 2500 ± 120 lux (16 hours of light and 8 hours of darkness), constant temperature of 25 ± 2 °C and continuous aeration. Treatments contained different nitrogen-phosphorus proportions (5, 10, 20, 40) in TMRL culture. The results showed that maximum cellular density and chlorophyll a and b were found in N-P proportion of 10 (1:10), whereas a significant reduction (P<0.05) was perceived in the growth and concentration of pigments in higher proportions (20 and 40). With the increase of N-P proportion, the number of Carotenoids rose and its highest rate was measured in 1:40 treatment. On the basis of the results, 1:10 proportion is recommended as the ideal amount for the purpose of achieving the highest rate of growth and photosynthetic reactions in C. calcitrans.
Article number: 6
Type of Study: Research |
Subject:
Special
Received: 2026/01/13 | Accepted: 2026/01/17 | Published: 2026/01/17
Received: 2026/01/13 | Accepted: 2026/01/17 | Published: 2026/01/17
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