Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People's Republic of China.
Mycologia. 2002 Jul-Aug;94(4):569-78. doi: 10.1080/15572536.2003.11833185.
Zoospores of mangrove isolates of Schizochytrium mangrovei KF6, KF7, KF12 (three strains), Thraustochytrium striatum KF9 and Ulkenia sp. KF13 were examined for their chemotactic responses to amino acids, carbohydrates, ethanol, and leaf extracts using a capillary root model. Most leaf extracts of mangrove plants and a marsh grass tested were shown to induce moderate chemotactic responses in zoospores of both S. mangrovei KF6 and Ulkenia sp. KF13. Of the remaining amino acids and carbohydrates evaluated, glutamic acid and pectin induced strong attraction in zoospores of S. mangrovei KF6 and Ulkenia sp. KF13, suggesting these are the major components in leaves which may be responsible for the chemotactic response of thraustochytrid zoospores in nature. Zoospores of T. striatum KF9, in general, showed a weak chemotactic response to all the tested compounds and extracts except cellulose, which elicited a moderate response. The ecological significance of the data presented is discussed.
采用毛细管根系模型，研究了红树林分离株裂殖壶菌 KF6、KF7、KF12（三株）、Striatum KF9 和 Ulkenia sp. KF13 的游动孢子对氨基酸、碳水化合物、乙醇和叶提取物的趋化反应。结果表明，大多数红树林植物和沼泽草的叶提取物均能诱导 S. mangrovei KF6 和 Ulkenia sp. KF13 的游动孢子产生中等强度的趋化反应。在所评价的剩余氨基酸和碳水化合物中，谷氨酸和果胶能强烈吸引 S. mangrovei KF6 和 Ulkenia sp. KF13 的游动孢子，表明这些是叶片中的主要成分，可能是导致游动孢子在自然界中趋化反应的原因。一般来说，KF9 的游动孢子对所有测试的化合物和提取物均表现出较弱的趋化反应，除纤维素外，纤维素能引起中等强度的反应。讨论了所提出数据的生态意义。
