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试验表明,病原菌生长发育的温度要求在15~35℃,菌丝生长和孢子形成的最适温度为30℃。病菌适应于较广泛的pH 值范围,在pH 为3~9之间的培养基上生长良好,但以pH5.5为最佳。连续紫外光照射,对病菌生长有抑制作用,黑暗条件有助于菌丝生长和孢子的形成。该菌能有效地利用各种碳源,以蔗糖和葡萄糖为最佳,淀粉次之。对各种形态氮源的利用基本相仿。在马铃薯—洋菜培养基(PDA)上菌丝生长和孢子的形成为最适。水稻叶鞘和嫩穗的提取液能促进病菌孢子提早萌发及提高发芽率。
The experiment shows that the temperature of pathogen growth and development is between 15 ℃ and 35 ℃, and the optimal temperature for mycelial growth and sporulation is 30 ℃. The germs are adapted to a wider range of pH values and grow well on media with pH between 3 and 9, but are best at pH 5.5. Continuous ultraviolet light irradiation, inhibition of the growth of bacteria, the dark conditions contribute to mycelial growth and sporulation. The bacteria can effectively use a variety of carbon sources, with sucrose and glucose as the best, followed by starch. The use of various forms of nitrogen sources are basically the same. Mycelial growth and sporulation are best on potato-agar medium (PDA). Rice leaf sheath and tender ear extract can promote germination of germs spores and improve germination rate.