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頁籤選單縮合
題名 | Effect of Culture origin on Chemical Stimulation of Sexual Reproduction in Phytophthora and Pythium=菌株源對化學誘導Phytophthora和Pythium之有性生殖的影響 |
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作者 | 吳浩; 鄭小波; 柯文雄; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷期 | 44:4 2003.10[民92.10] |
頁次 | 頁323-328 |
分類號 | 373.1 |
關鍵詞 | 卵磷脂; 甘油脂; 有性生殖; Lecithin; Glycerides; Phytophthora spp.; Phthium spp.; Sexual reproduction; |
語文 | 英文(English) |
中文摘要 | 卵磷脂經氯化納水溶液清洗可以誘導 Phytophthora boehmeriae P. sojae, P. catorum和Pythium aphanidermatum卵孢子形成。一種商品化甘油脂具有 99% 純度之棕櫚酸含有抑制卵孢子形成物質。利用矽酸鎂管柱分析純化去除抑制物質比薄層分析或氯化鈉清洗之效果好。經純化後,單棕櫚酸精、雙棕櫚酸精和三棕櫚酸精均具有誘導 Phytophthora 之有性生殖。這些化合物可以誘導 P. boehmeriae 和 P. sojae 形成卵孢子,但對 P.medicaginis 沒有效果,然而對P. sojae不同菌株間也有差異,如對菌株 S317 有誘導作用 , 但對菌株 CN-1 則沒有作用。Py. aphanidermatum 培養於基本培養基上,其菌絲生長稀疏,但移植於沒有養分之純水瓊脂培養基可以穩定形成卵孢子。將培養於液體基本培養基之P. boehmeriae, P. cactorum 和 P. sojae 菌絲萃取可以誘導自身菌種形成有性生殖。本研究結果支持下述之假說:pythiaceous 真菌在環境逆壓下,可以啟動合成誘導有性生殖之物質。 |
英文摘要 | Lecithin washed with NaC1 solution was stimulatory to oospore formation of Phytophthora boehmeriae, P. sojae, P. cactorum, and Pythium aphanidermatum. Commercial glycerides of palmitic acid with 99% purity were found to contain a substance inhibitory to oospore formation. Purification with florisil column chromatography was more effective in removing the inhibitory substance than thin-layer chromatography or NaCl washing. After purification, monopalmitin, dipalmitin and tripalmitin were found to be stimulatory to the sexual reproduction of Phytophthora for the first time. These compounds were stimulatory to oospore formation of P. boehmeriae and P. sojae but not P. medicaginis, and were stimulatory to isolate S317 of P. sojae but not isolate CN-1 of the same species. Pythium aphanidermatum cultured on basal medium grew sparsely but steadily and produced oospores after being transferred to nutrient-free water agarose. Extracts from mycelia of P. boehmeriae, P. cactorum, and P. sojae grown in liquid basal medium were stimulatory to their own sexual reproduction. Results support the hypothesis that pythiaceous fungi can synthesize substances needed for sexual reproduction but require a stress factor to trigger the process. |
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