摘要
目的:探讨高温胁迫下半夏倒苗过程中光合作用及叶绿素荧光特性的变化,从而为延缓半夏倒苗提供信息。方法:在半夏植株高15 cm左右时,给予37℃的高温胁迫,于不同的胁迫处理天数分别测定半夏叶片叶绿素含量、光合作用和叶绿素荧光参数等生理指标。结果与结论:随着高温胁迫时间的延长,半夏叶片叶绿素含量、Chla/Chlb、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、最大荧光产量(Fm)、光合电子传递量子效率(ΦPSⅡ)、光系统Ⅱ的原初光能转换效率(Fv/Fm)、光化学淬灭系数(qP)下降,而胞间CO2浓度(Ci)、最小荧光产量(F0)、非光化学淬灭系数(NPQ)上升。
Objective: To study the change of photosynthesis and chlorophyll fluorescence characteristics of Pinellia ternata around sprout tumble.Method: Tubers of P.ternata were cultured firstly at(25±1) ℃ for certain days,and then they were coerced under 37 ℃ stress in the same artificial climate boxes.The chlorophyll contents,photosynthesis and chlorophyll fluorescence during different stages of high temperature stress were measured.Result and Conclusion: After under high temperature stress,the chlorophyll contents,the ratio of chlorophyll a/b,photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr),maximum fluorescence(Fm),quantum yield of PSⅡ(ΦPSⅡ),intrinsic photochemical efficiency of PSⅡ(Fv/Fm) and the chlorophyll photochemical quenching(qP) decreased,but the intercellular CO2 concentration(Ci),minimal fluorescence(F0),the chlorophyll non-photochemical quenching(NPQ) increased.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2010年第17期2233-2235,共3页
China Journal of Chinese Materia Medica
基金
国家自然科学基金项目(30973963)
安徽省自然科学基金项目(090413252)
安徽高校省级自然科学研究重点项目(KJ2009A160)
关键词
半夏
高温胁迫
光合作用
叶绿素荧光
Pinellia ternata
high temperature stress
photosynthesis
chlorophyll fluorescence