Miwa, Y.; Awanthi, M.G.G.; Soga, K.; Tanaka, A.; Ito, M.; Numata, Y.; Sato, Y.; Konishi, T. The Cell Wall Characterization of Brown Alga Cladosiphon okamuranus during Growth. Plants2023, 12, 3274.
Miwa, Y.; Awanthi, M.G.G.; Soga, K.; Tanaka, A.; Ito, M.; Numata, Y.; Sato, Y.; Konishi, T. The Cell Wall Characterization of Brown Alga Cladosiphon okamuranus during Growth. Plants 2023, 12, 3274.
Miwa, Y.; Awanthi, M.G.G.; Soga, K.; Tanaka, A.; Ito, M.; Numata, Y.; Sato, Y.; Konishi, T. The Cell Wall Characterization of Brown Alga Cladosiphon okamuranus during Growth. Plants2023, 12, 3274.
Miwa, Y.; Awanthi, M.G.G.; Soga, K.; Tanaka, A.; Ito, M.; Numata, Y.; Sato, Y.; Konishi, T. The Cell Wall Characterization of Brown Alga Cladosiphon okamuranus during Growth. Plants 2023, 12, 3274.
Abstract
The present study provides new insights into the growth of brown algal cell wall by showing that cell wall polysaccharide plays an important role in the process of growth consider- ing the physicochemical characteristic of young and old Cladosiphon okamuranus. To determine its structural variation in detail, the cell wall was sequentially fractionated into five fractions: hot water (HW), ammonium oxalate, hemicellulose-I (HC–I), HC-II, and cellulose, and analyzed physicochemically. Results showed that almost 80% of the total recovery cell wall from both young and old thalli was HW and HC-I contained mainly fucoidan composed of Fuc, GlcA, and sulfate in molar ratios of 1.0: 0.3: 0.6~0.7 and 1.0: 0.3: 0.2~0.3, respectively. Fucoidan in HW was a highly sulfated matrix polysaccharide abundance in young thalli, while fucoidan in HC-I was rich in old thalli and functions as hemicellulose in land plants, crosslink with cellulose and strengthen the cell wall. We found that HW and HC-I were particularly involved in the growth and strength of old thalli appeared to be due to the deposition of HC-I and reducing of water content during the growth process.
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