Cultured and packed sea grapes (Caulerpa lentillifera): effect of different irradiances on photosynthesis

Abstract

The green macroalga Caulerpa lentillifera (sea grapes, green caviar) is a promising source for future nutrition due to its beneficial composition for human consumption. It is cultured in tidal ponds, mainly in Vietnam and the Philippines, and stored for shipment and retail in plastic containers, like polystyrene (PS) and polyethylene terephthalate (PET), exhibiting different properties. This study investigates the influence of irradiances on the physiology of sea grapes under culture and packaging ambience in PET using pulse-amplitude modulated (PAM) fluorometry. Fv/Fm values of C. lentillifera significantly decreased < 0.54 ± 0.06 standard deviation (SD) after 7 days of culture under 100 μmol photons m−2 s−1, but with the potential of recovery. In packaging ambience in the state of desiccation, sea grapes exposed to room irradiances (3 μmol photons m−2 s−1) for 12 days were still physiologically in a good condition (Fv/Fm = 0.70 ± 0.06). However, 12 days under irradiances of 70 μmol photons m−2 s−1 leads to decreased Fv/Fm (0.42 ± 0.11) and a moisture content of 88.2 ± 3.3% of initial. After re-immersion in sea water under room irradiances, Fv/Fm values recovered to a certain degree. In darkness, desiccation was followed by a decrease of Fv/Fm to 0.09 ± 0.19 and moisture content of 49.3 ± 20.2% of initial with no recovery after re-immersion under room irradiances. Results suggest shading of C. lentillifera in pond culture and PET containers as suitable packaging for sea grapes, but a dim light source should be provided during storage.

Structural characterization and SARS-CoV-2 inhibitory activity of a sulfated polysaccharide from Caulerpa lentillifera

“…C. lentillifera is mainly distributed in tropical and subtropical regions, such as Philippine, Vietnam, and Japan. Recently, C. lentillifera has received considerable attention for its expansion of farming scale and increasing consumption ( Stuthmann et al, 2021 ). C. lentillifera is a low-energy food with high contents of dietary fibers, and its polysaccharide content is as high as ≥40% (dry weight) ( Zhang et al, 2020 ).…”

Analisis Pertumbuhan Caulerpa lentifera yang Terintegrasi dengan Budidaya Haliotis squamata

“…Caulerpa lentillifera adalah rumput laut yang dapat dimakan yang tumbuh di perairan tropis dikenal sebagai anggur laut dengan rasa sangat mirip dengan telur salmon, tetapi segar dan harum, tanpa bau amis telur ikan (Huang et al, 2020). Makroalga hijau Caulerpa lentillifera merupakan sumber nutrisi yang menjanjikan untuk masa depan karena manfaat dan komposisinya untuk konsumsi manusia (Stuthmann et al, 2020). Hal menarik dari penelitian ini adalah budidaya Caulerpa lentifera dilakukan dengan memadukan bersama budidaya Haliotis squamata (abalon).…”

The antioxidative potential of sea grapes (Caulerpa lentillifera, Chlorophyta) can be triggered by light to reach comparable values of pomegranate and other highly nutritious fruits

“…During culture and storage of C. lentillifera, suitable light conditions have been shown to be a crucial factor for the shade-adapted light-sensitive seaweed, with irradiances higher than 100 lmol photons m -2 s -1 causing physiological stress reactions, reflected in e.g. lower maximum quantum yields of photosystem II (F v / F m ) (Guo et al, 2015;Stuthmann et al, 2020). A smaller portion of the harvest is dehydrated with brine cure or salt for preservation before retail (Zubia et al, 2020).…”