Mohammad Sadegh Alavi-Yeganeh, Somayeh Razavi,
Volume 5, Issue 4 (Spring 2016)
Abstract
We used 50 specimens of Alosa braschnikowi (A. brschnikowi) to study the growth effect on Gill raker morphology. Gill rakers counted as 26-47 which increased in relation to increase in TL (P<0.05). Gill raker lengths and the length:width ratio decreased with a high coefficient of relationships (R2=0.818 and 0.634 subsequently) regarding the increase of TL. The proportion of gill raker length to gill filament length decreased with increased TL. Results indicated selective filter feeding behavior of A. braschnikowi and variation of gill raker morphological characteristics with TL increase during growth.
Miss Raziye Mohammadi, Dr Morteza Yousefzadi, Dr Roya Razavizadeh, Dr Fatemeh Nejad-Alimoradi,
Volume 12, Issue 1 (Summer 2022)
Abstract
Abstract
One way to reduce the use of chemical fertilizers without harming plant nutrition and increase the absorption of nutrients in crops is to use biostimulants. Seaweed extracts is one of the plant biostimulants that is used in agricultural systems because of their potential for improving nutrient use efficiency, resistance to stressors, and product quality. In this study, the effects of aqueous extract of a green macroalgae (Ulva flexuosa) and a brown macroalgae (padina) at four levels (dilutions 5, 10, 20 and 40%) as well as NPK chemical fertilizer at one level (concentration 0/625 mg/ml) on the growth of basil (Ocimum basilicum L.) was examined for 45 days. The results showed that the effect of brown algae extract on germination was more significant while 5% dilution of green algae increased plant root length. Treatment with both green and brown macroalgae extracts improved biochemical parameters. The highest amount of chlorophyll, carotenoids and anthocyanins was observed in dilution of 20% and the highest amount of flavonoids, phenol and reducing power was observed in 10% dilution of brown macroalgae extract.
