CAJ | 학술논문

为探讨甘薯(Dioscorea esculenta)被薯瘟菌(Ralstonia solanacearum)侵染后的响应，以抗病品种‘湘薯75-55’和感病品种‘胜利百号’为材料，对甘薯叶片的光合特性和叶绿体结构进行了研究。结果表明，薯瘟菌侵染后，‘胜利百号’叶片的细胞膜透性(MP)明显增大，叶绿素(Chl)含量下降，净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)下降，胞间二氧化碳浓度(Ci)和内源ABA含量急剧升高，且细胞膜完整性被破坏，叶绿体数目减少、膨胀模糊、基粒片层松散解体以及淀粉粒变小；而‘湘薯75-55’的各个指标变化不大，细胞膜结构完整，叶绿体基粒片层排列整齐。因此，薯瘟菌侵染后不同抗病品种甘薯叶片在光合特性和叶绿体结构上表现出显著的差异。
위탐토감서(Dioscorea esculenta)피서온균(Ralstonia solanacearum)침염후적향응，이항병품충‘상서75-55’화감병품충‘성리백호’위재료，대감서협편적광합특성화협록체결구진행료연구。결과표명，서온균침염후，‘성리백호’협편적세포막투성(MP)명현증대，협록소(Chl)함량하강，정광합속솔(Pn)、증등속솔(Tr)화기공도도(Gs)하강，포간이양화탄농도(Ci)화내원ABA함량급극승고，차세포막완정성피파배，협록체수목감소、팽창모호、기립편층송산해체이급정분립변소；이‘상서75-55’적각개지표변화불대，세포막결구완정，협록체기립편층배렬정제。인차，서온균침염후불동항병품충감서협편재광합특성화협록체결구상표현출현저적차이。
In order to understand the response of sweet potato (Dioscorea esculenta) toRalstonia solanacearum, two varieties, including resistant ‘Xiangshu 75-55’ and sensitive ‘Shenglibaihao’, were used as materials, the changes in photosynthetic characteristics, abscisic acid (ABA) content and chloroplast ultrastructure were studied after infected byR. solanacearum. The results showed that the membrane permeability (MP), intercellular CO2 concentration (Ci) and endogenous ABA content in ‘Shenglibaihao’ infected byR. solanacearumincreased markedly, but chlorophyll (Chl) content, net photosynthetic rate (Pn), transpiration rate (Tr) and stomatal conductance (Gs) obviously decreased. Besides, the integrity of chloroplast membrane system was damaged, the number of chloroplast decreased, and expansion to collapse, the grana lamella loosed and disintegrated, and starch grains got smaller in ‘Shenglibaihao’ leaves affected. In contrast, for ‘Xiangshu 75-55’, the changes in the related physiological indexes were not different signiifcantly, and the plasma membrane and lamellar still kept integration. Therefore, there were distinct differences in the PMP, Chl content, ABA content, Pn and chloroplast structure between the two sweet potato varieties with different disease-resistance.