Evaluation of the in vitro methods for micropropagation of Chondracanthus acicularis (Roth) Fredericq (Gigartinales, Rhodophyta): tissue culture and production of protoplasts - Normandie Université Accéder directement au contenu
Article Dans Une Revue Journal of Applied Phycology Année : 2013

Evaluation of the in vitro methods for micropropagation of Chondracanthus acicularis (Roth) Fredericq (Gigartinales, Rhodophyta): tissue culture and production of protoplasts

Résumé

Tissue was cultured and protoplasts isolated from the carrageenophyte Chondracanthus acicularis with the aim of developing micropropagation as an alternative to harvesting raw material from natural beds. Both adventitious shoots and filamentous calluses were induced by tissue culture on medium solidified with 0.4–1 % (w/v) agar. Adventitious shoots were mainly produced from discoid bases while filamentous calluses were mainly induced from basal zones and sub-apical explants. A gradient of the regeneration ability was observed from the top to the bottom of the thallus. The discoid base was the most reactive explant and produced the highest number of adventitious shoots compared to basal zones and sub-apical explants, irrespective of the concentration of agar. Protoplasts were isolated enzymatically from the whole thallus using a combination of cellulase R-10 Onozuka, macerozyme R-10, and crude extract of the gland gut of algivorous molluscs. The highest mean yield of protoplasts (1.2 × 106 protoplasts g−1 fresh weight) was obtained after 16 h of digestion with an enzyme mixture containing 2 % (w/v) cellulase R-10, 1 % (w/v) macerozyme R-10 Onozuka, 4 % (v/v) crude extract of gut gland of Haliotis, 0.8 M mannitol, 50 mM sodium citrate, 0.3 % (w/v) bovine serum albumin. Depending on the conditions, mean protoplast yields ranged from 3.14 × 105 to 1.2 × 106 protoplasts g−1 fresh weight. Different factors (storage duration, mannitol, sodium citrate, crude extract of the gland gut of algivorous molluscs) were tested to improve the yield of protoplasts but none has a significantly effect.

Dates et versions

hal-04126527 , version 1 (13-06-2023)

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Citer

Moussa Yagame Bodian, Nadège Lafontaine, Maria Matard, Isabelle Mussio, Anne-Marie Rusig. Evaluation of the in vitro methods for micropropagation of Chondracanthus acicularis (Roth) Fredericq (Gigartinales, Rhodophyta): tissue culture and production of protoplasts. Journal of Applied Phycology, 2013, 25 (6), pp.1835-1845. ⟨10.1007/s10811-013-0042-3⟩. ⟨hal-04126527⟩
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