Study of Seaweed Kappaphycus alvarezii Explants Growth in the Different Salinity Concentrations

Abstract

HighlightThe best salinity for the thallus growth of K. alvarezii is 32 mg/LThe salinity indicates the osmotic balance of K. alvarezii seaweedThis osmoregulation process affects the nutrient absorption of K. alvarezii seaweedThis study aims to develop the availibility of superior seeds of K. alvareziiAbstract Kappaphycus alvarezii is one of the leading commodities in Indonesian waters. Demand for this commodity is quite high, as reflected in the increasing volume of exports each year. Fulfillment of these demands is obtained from the production of cultivation. Generally farmers get natural seaweed seedlings, namely cuttings from existing seaweed. The continuous use of seeds from nature can cause deterioration in the quality and quantity. Handling the problem of quality deterioration from seaweed seeds originating from nature, can be overcome by multiplying the seeds through tissue culture methods in vitro. In term of tissue culture techniques method, the most important thing to note is environmental parameters. An environment parameter that changes suddenly such as salinity can inhibit the growth of seaweed. Thus, this work is attampting the different salinity treatment on seaweed explants K. alvarezii. This study aims at determining (weight) the explants of K. alvarezii with a comparison of the different salinity levels in the in vitro tissue culture method. The method used in this study was a completely randomized design (CRD) with the different salinity treatments namely 30, 31, 32, 33, and 34 ppt. The results showed that the different salinities influenced the growth rate of K. alvarezii seaweed explants with the best explant growth at the salinity of 31 ppt, while the lowest growth value was obtained at 34 ppt

Carrageenan From Kappaphycus alvarezii (Rhodophyta, Solieriaceae): Metabolism, Structure, Production, and Application

“…Salinity is another abiotic factor that may influence the carrageenan yields of K. alvarezii because it affects the seaweed’s osmotic equilibrium and nutrient absorption ( Aris et al, 2021 ). Since carrageenan is essential for maintaining the ionic equilibrium of the cell, it is well recognized that salinity impacts the osmoregulation mechanism, affecting carrageenan yield and quality ( Percival, 1979 ).…”

“…However, Setyawidati et al (2017) reported that the salinity ranges differing between high (33.8–34.8 psu) and low (33.0–34.0 psu) carrageenan production were only minor, implying that salinity amplitude may be insufficient to explain the variability in carrageenan yield. In contrast, Aris et al (2021) investigated the effect of different salinity levels (30–34 ppt) on the weight of K. alvarezii explants and discovered that the varied salinities affected the growth rate of explants, with the best explant growth occurring at a salinity of 31 ppt and the lowest growth occurring at a salinity of 34 ppt, respectively.…”

Penggunaan Pupuk Conway Pada Media Kultur Terhadap Pertumbuhan Bibit Rumput Laut Eucheuma cottonii

“…Suhu pada wadah pemeliharaan rumput laut selama pengukuran yaitu berkisar antara 24-27℃, dimana kisaran suhu tersebut efektif dalam menunjang pertumbuhan serta dapat ditolerir oleh rumput laut. Aris et al (2021) menyatakan, bahwa Eucheuma sp. memiliki suhu toleransi antara 24-36 O C. Suhu berpengaruh dalam proses fisiologi rumput laut, yaitu untuk fotosintesis dan respirasi, serta untuk proses metabolisme sehingga dapat mempengaruhi pertumbuhan rumput laut tersebut (Erwansyah et al, 2021).…”

Growth of Kappaphcus alvarezii in vertical method of multi-trophic system based on feeding rate

“…Salinity fluctuated narrowly in the range of 29.4-30.0 ppt which was conducive to K. alvarezii as a stenohaline species (Reis et al, 2011). If seaweed lives at the right salinity, then nutrient absorption and growth at the organ, tissue and cell levels will run well (Lobban &Harrison, 2000 andAris et al, 2021). In addition to the ability of seaweed to produce oxygen through photosynthesis, the aeration factor in this study contributed to the dissolved oxygen (Kumar et al, 2013), which was in the range of 5.3-7.5 mg L -1 .…”