蒙古栎叶中乙烯与松栎柱锈菌春孢子器成熟的关系

摘要

By the field investigation and inside experiments , we studied the gall rust disease of Cronartium quercuum in Daxing’an Mountains .There was close relation between the ethylene content in Quercus mongolica leaves and the maturity of C.guerc-uum aecia.The aecia matured earlier about one week in the forests with Q.mongolica than that without Q.m ongolica.The aeciospores growing in 2%agar media with Q.mongolica leaf juice( 10 d, ethylene of 193.596 nmol/g) reached the highest germination rate followed by that growing in 2%agar media with Q.mongolica leaf juice (5 d, ethylene of 993.168 nmol/g), and that growing in 2%agar media without Q.mongolica leaf juice had the lowest germination rate .Ethylene content of Q. mongolica leaf was the highest when they grew in the fifth day , and then decreased progressively until being stable .%对大兴安岭樟子松瘤锈病（ Cronartium quercuum）的调查和室内试验的结果表明：蒙古栎（ Quercus mon-golica）叶子释放的乙烯，与松栎柱锈菌（ Cronartium guercuum）春孢子器的成熟和春孢子萌发关系密切。春孢子器在有蒙古栎生长的林分可提前一周左右成熟。在10天生的蒙古栎叶汁（乙烯质量摩尔浓度193．596 nmol· g－1）＋2％琼脂培养基上，春孢子萌发率最高，其次为5天生的蒙古栎叶汁（乙烯质量摩尔浓度993．168 nmol · g－1）＋2％琼脂培养基，萌发率最低的是不加蒙古栎叶汁的对照。蒙古栎叶子发育到第5天，乙烯质量摩尔浓度最高，以后递减并趋于稳定。