COMPETITION BETWEEN PYRENOPHORA TRITICI-REPENTIS AND SEPTORIA-NODORUM IN THE WHEAT LEAF AS MEASURED WITH DE WIT REPLACEMENT SERIES
COMPETITION BETWEEN PYRENOPHORA TRITICI-REPENTIS AND SEPTORIA-NODORUM IN THE WHEAT LEAF AS MEASURED WITH DE WIT REPLACEMENT SERIES
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DOI：
10.1094/phyto-80-1177
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发表时间：
1990-11-01
期刊：
影响因子：
3.2
通讯作者：
HARTNETT, DC
中科院分区：
文献类型：
--
作者：
ADEE, SR;PFENDER, WF;HARTNETT, DC
采用改良的植物生态学方法“de Wit替代系列”对小麦核腔菌和颖壳针孢的竞争相互作用进行了定量研究。“P. tritici-repentis和S. nodorum单独和以不同比例一起接种在开花期的小麦植株[Triticum aestivum]上。收获成熟叶并在潮湿室中孵育，之后计数真菌孢子果。对于每种接种混合物，将每种真菌的相对产率（混合接种中其子实体产率与单次接种中其子实体产率的比率）相对于接种混合物中真菌的比例作图。接种率和相对产量之间的关系进行了统计比较，一个假设的非竞争模型。小麦疫霉菌与S.结节病。小黑麦是较好的竞争者，因为其相对产量受S. nodorum，反之亦然。德威特替代系列是一个有用的工具，定量研究植物病原体之间的竞争相互作用。
Competitive interactions between Pyrenophora tritici-repentis and Septoria nodorum were studied quantitatively by a modified plant ecology technique known as "de Wit replacement series." P. tritici-repentis and S. nodorum were inoculated alone and in various proportions together on wheat plants [Triticum aestivum] at anthesis. Mature leaves were harvested and incubated in moist chambers, after which fungal porocarps were counted. For each inoculation mixture, the relative yield of each fungus (ratio of its sporocarp yield in the mixed inoculation to its sporocarp yield in single inoculation) was plotted against the proportion of the fungus in the inoculation mixture. The relationship between inoculation ratios and relative yields was compared statistically to a hypothetical noncompetition model. Measurable competition occurred between P. tritici-repentis and S. nodorum. P. tritici-repentis was the better competitor because its relative yields were less affected by the presence of S. nodorum than vice-versa. The de Wit replacement series is a useful tool for quantitatively examining competitive interactions between plant pathogens.