小麦与白粉病菌相互作用的钙调素定位

Localization of calmodulin in interaction between wheat and Erysiphe graminis f. sp. tritici

本文对白粉病菌侵染后小麦表皮细胞内钙调素的动态变化过程进行了分析。结果表明 ,在正常情况下钙调素主要集中分布在液泡内和胞外 ,在细胞衰老时进入解体的细胞器如细胞核等 ;接种白粉病菌后 ,感病细胞内的钙调素含量降低 ;但随着细胞的衰老钙调素含量又逐渐增加。钙调素逐渐穿过吸器外膜进入吸器外基质和退化的吸器内部。病原菌侵染后 ,抗病细胞中的钙调素迅速增加 ,并随着细胞的死亡散布在这个细胞中。上述结果说明 。

The localization of calmodulin on the interaction between wheat and Erysiphe graminis f. sp. tritici showed that the calmodulin was primarily located in the vacuole and the extracellular gap, but in the mature cell it appeared in the regarded organelle. As attacked by the pathogen, calmodulin in the host cell with primary haustorium was decreased significantly, and opposition case happened in the resistant cells. As the haustorium developed and senesced, great amount of calmodulin entered the extrahaustorial matrix through host protoplast membrane,which suggested that the suitable Ca 2+ is the critical factor for the pathogen haustorial development and its function for absorption.