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首页> 外文期刊>Phycological Research >Seasonal variation of the agar quality and chemical composition of Gracilaria veleroae and Gracilaria vermiculophylla (Rhodophyceae, Gracilariaceae) from Baja California Sur, Mexico
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Seasonal variation of the agar quality and chemical composition of Gracilaria veleroae and Gracilaria vermiculophylla (Rhodophyceae, Gracilariaceae) from Baja California Sur, Mexico

机译：墨西哥南下加利福尼亚州的Gracilaria veleroae和Gracilaria vermiculophylla（Rhodophyceae，Gracilariaceae）的琼脂质量和化学成分的季节性变化

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摘要

Yield and physico-chemical properties of agar from Gracilaria veleroaeE.Y. Dawson and Gracilaria vermiculophylla (Ohmi) Papenfuss were studied and the chemical composition of the two seaweeds was determined. Samples were collected seasonally from summer 2003 to spring 2005. The agar yield did not vary significantly between seasons for both species. The lowest agar gel strength was obtained from G.veleroae (207.5gcm2) in summer 2003 and the highest from G.vermiculophylla (793.1gcm2) in winter 2004. Melting temperatures and hysteresis were higher in G.vermiculophylla, whereas gelling temperatures and 3,6-anhydrogalactose content were higher for G.veleroae. Moisture, ash, crude fiber, and ether extract showed no significant seasonal variation for G.veleroae. The chemical composition of G.vermiculophylla showed significant seasonal variation. G.vermiculophylla possesses a better agar quality than G.veleroae and is a species that could be considered as a source of agar for commercial use.
机译：江Gra（Gracilaria veleroae）琼脂的产量和理化特性研究了Dawson和Gracilaria vermiculophylla（Ohmi）Papenfuss，并确定了两种海藻的化学成分。从2003年夏季到2005年春季，按季节采集样品。两种物种的琼脂产量在不同季节之间变化不大。最低的琼脂凝胶强度是在2003年夏季从藜麦（207.5gcm2）获得的，而在2004年冬季则从ver茶（793.1gcm2）获得的最高。ver茶的融化温度和滞后性较高，而胶凝温度和3则较高， vel.ae的6-脱水半乳糖含量较高。水分，灰分，粗纤维和乙醚提取物对藜麦没有明显的季节性变化。 ver木的化学成分表现出明显的季节性变化。 ver菌比琼脂菌具有更好的琼脂质量，并且可以被认为是商业用途琼脂的来源。

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