摘要
以 2个杏品种幼果为试材 ,研究了低温及INA细菌影响下叶绿素荧光参数的变化。结果表明 ,低温胁迫降低了杏幼果PSⅡ潜在活性 (Fv/Fo)、原初光能转化效率 (Fv/Fm)和荧光光化学猝灭系数qP ,提高了荧光非光化学猝灭系数 qN。即使光合电子传递的量子产额下降 ,INA细菌能加剧低温胁迫的破坏程度 ,使受害温度由- 4℃升高到 - 2～ - 3℃ ,是诱发幼果霜冻害的一个重要因素。另外 ,叶绿体PSⅡ活性中心的受害程度与品种及幼果大小有关。
Effects of low temperature and INA bacteria on the change of chlorophyll's fluorescence parameter of young fruits in two apricot cultivars were investigated. Results showed that low temperature decreased the potential activity(Fv/Fo), conversion efficiency of primary light energy (Fv/Fm)of PSⅡand the parameter of photochemical quenching qP of young fruits of two apricot cultivars, and enhanced the parameter of non-photochemical quenching qN, making quantum yield of photosynthetic electron transfer descent. The existence of INA bacteria could intensify the damage of low temperature, raised the injury temperature to -2～-3℃ from -4℃. So it was demonstrated that INA bacteria was one of major factors to induce frostiness of apricot fruits. In addition, the damaged degree of PSⅡ activity center was related to the size and cultivar of apricot young fruits.
出处
《中国农业科学》
CAS
CSCD
北大核心
2002年第9期1090-1094,共5页
Scientia Agricultura Sinica
基金
河北省自然科学基金资助项目 ( 39914 7)
