| 彭思源1#, 喻 曼2#, 丁 中1, 阳祝红1, 叶 姗1*.不同地理来源的拟禾本科根结线虫对温度胁迫的耐受性[J].植物保护,2022,48(5):108-115. |
| 不同地理来源的拟禾本科根结线虫对温度胁迫的耐受性 |
| Tolerance of different geographical populations of Meloidogyne graminicola to temperature stress |
| 投稿时间：2021-09-07 修订日期：2021-11-22 |
| DOI：10.16688/j.zwbh.2021492 |
| 中文关键词: 拟禾本科根结线虫 温度胁迫 耐受性 地理群体 |
| 英文关键词:Meloidogyne graminicola temperature stress tolerance geographical population |
| 基金项目:湖南省植保植检站植物防疫防控科研项目(HNZB202003); 公益性行业(农业)科研专项(201503114) |
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| 中文摘要: |
| 为明确拟禾本科根结线虫不同地理群体对温度胁迫的耐受性, 本文比较了河南新乡?湖南平江?湖南益阳?湖南望城?广西融安?广西临桂?广东湛江?海南临高等8个地理群体的2龄幼虫和卵对0?4℃和37℃的耐受性以及2龄幼虫经4℃预处理5 d后在0℃下的存活率?结果表明:不同地理来源的拟禾本科根结线虫对温度的耐受性存在差异?2龄幼虫在0℃和4℃低温下存放不同时间, 其死亡率由低到高为:新乡群体<平江?望城?益阳群体<融安?临桂?湛江?临高群体, 表现出随纬度增加耐寒性增强的趋势; 不同纬度群体卵在0℃或4℃存放不同时间后其孵化率由高到低为:新乡?平江?望城?益阳?融安?临桂群体>湛江?临高群体?卵经37℃高温处理10 d后, 低纬度的临高群体的孵化率明显高于其他纬度较高的地理群体, 显示临高群体对高温具有较强的适应性?4℃低温预处理可以提高各群体在0℃下的存活率, 湖南平江?望城?益阳群体的存活率提高最明显, 表明湖南3个群体对低温具有较高的适应性? |
| 英文摘要: |
| In order to understand the differences in temperature tolerance among geographical populations of Meloidogyne graminicola, we collected eight M.graminicola populations from Xinxiang, Henan province, Pingjiang, Yiyang, Wangcheng, Hunan province, Rongan, Lingui, Guangxi Zhuang Autonomous region, Zhanjiang, Guangdong province and Lingao, Hainan province, respectively. The temperature tolerance of second-stage juveniles (J2) and eggs of different geographical populations were investigated at 0, 4℃ and 37℃, and the survival rate of J2 was measured at 0℃ after pretreated at 4℃ for five days. The results showed that M. graminicola displayed geographical difference in temperature tolerance. At 0℃ or 4℃, the cold tolerance of different geographical populations of M. graminicola increased with increasing latitude. The mortality of J2 of populations from different latitudes obviously varied, from low to high: Xinxiang population |
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