Chasing Light: How Dichromatic LEDs Affect the Elemental Profile of Gongolaria barbata

Year 2023, , 147 - 157, 27.12.2023

Melis Yılmaz , İlknur Ak

https://doi.org/10.46384/jmsf.1368926

Abstract

This study aims to investigate the influence of three different dichromatic LED light sources and varying photoperiod durations on the mineral content and trace element compositions in cultivated Gongolaria barbata under controlled culture conditions. During the experiment, red-blue (RB), blue-green (BG), red-green (RG) and fluorescent lights were examined at 16:16, 12:12, and 8:16 Light: Dark (L:D) photoperiods, and at 150 μmol photon m-2 s-1 intensity of light in all treatments. The elemental compositions of the thallus samples were analyzed for Mg, Ca, K, Na, P, Zn, Mo, Cu, Mn, Cr, Co, Cd, Fe, and As.. Our results showed that macro element and trace element compositions significantly varied among different experimental groups. Regarding the order of abundance, macroelements were ranked as follows: K > Na > Ca > Mg > P. Meanwhile, trace elements followed this order: As > Zn > Mn > Cr > Co > Cu > Cd > Mo > Fe. Among the experiment groups, the highest value of the macro elements was recorded as 1041.3±22.2 mg kg-1 for K, and the lowest value was 26.61±0.02 mg kg-1 for the P. Among the trace elements, for As, the highest value was recorded as 1339.86±5.27 µg kg -1, and the lowest was determined at 1.93±0.04 mg kg-1 for the Fe. The findings highlight that LED lighting conditions can significantly influence the elemental composition of G. barbata.

Keywords

Macro elements, Trace elements, Brown seaweed, Gongolaria barbata, Dichromatic LED

Project Number

FHD-2021-3677

Işığın peşinde: Dikromatik LED'ler Gongolaria barbata'nın Elementel Profilini Nasıl Etkiler?

Abstract

Bu çalışmanın amacı, kontrol koşullarında yetiştirilen Gongolaria barbata’nın mineral içeriği ve iz element değişimleri üzerinde üç farklı dikromatik LED ışık ve değişen fotoperiyot sürelerinin etkisini araştırmaktır. Deneme aşamasında, kırmızı-mavi (RB), kırmızı-yeşil (RG), mavi-yeşil (BG) ve floresan (F) LEDler, sırasıyla 16:16, 12:12 ve 8:16 Aydınlık:Karanlık (L:D) fotoperiyotlarında, her biri 150 μmol photon m-2 s-1 yoğunluğunda incelenmiştir. Tallusların; Ca, K, Mg, Na, P, Zn, Mo, Mn, Fe, Cu, Cr, Co, Cd ve As kompozisyonları analiz edilmiştir. Sonuçlarımıza göre, makroelement ve iz element kompozisyonları farklı deney grupları arasında önemli varyasyonlar gösterdi. Türde bulunan makroelementlerin sıralaması şu şekildedir: K > Na > Ca > Mg > P, aynı zamanda iz elementler şu sırayı takip etmektedir: As > Zn > Mn > Cr > Co > Cu > Cd > Mo > Fe. Deneme grupları arasında, makro elementlerin en yüksek değeri K elementi için 1041.3±22.2 mg kg-1 olarak belirlenirken, en düşük değer P için 26.607±0.02 mg kg-1 olarak belirlendi. İz elementler arasında ise en yüksek değer As için 1339.86±5.27 µg kg-1 tespit edilirken, en düşük değer Fe için 1.930±0.04 mg kg-1 olarak belirlendi. Bulgular, LED aydınlatma koşullarının G. barbata türünün elementel kompozisyonunu önemli ölçüde etkileyebileceğini vurgulamaktadır.

Keywords

Makro elementler, İz elementler, Kahverengi deniz yosunu, Gongolaria barbata, Dikromatik LED

Project Number

FHD-2021-3677

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