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高温胁迫对不同小麦品种光合性能的影响
张裴裴,黄正来,张文静,汪强,刘明超
0
(安徽农业大学农学院,合肥 230036)
摘要:
选用不同品种小麦(弱春性品种淮麦30、半春性品种郑麦9023和半冬性品种烟农19),研究花后7 d和花后15 d高温对旗叶光合和叶绿素荧光特性的影响。结果表明,花后7~9 d(T1)高温24 ℃/34℃(夜/昼)处理后,烟农19的净光合速率(Pn)、气孔导度(Gs)、PSⅡ最大光化学效率(Fv/Fm)、光化学猝灭系数(qP)、非光化学猝灭系数(qn)和光系统Ⅱ(PSⅡ)非循环光合电子传递速率(ETR)显著高于淮麦30和郑麦9023;郑麦9023的PnCiFo显著高于淮麦30,胞间CO2浓度(Ci)显著高于烟农19;淮麦30的CiqPqn显著高于郑麦9023。花后15 d高温26 ℃/36 ℃(夜/昼)处理后,烟农19的PnGsCiFv/FmqPqn和ETR显著高于淮麦30和郑麦9023;郑麦9023的PnGs CiFv/FmqP和ETR显著高于淮麦30;淮麦30的Fo显著高于郑麦9023和烟农19。花后7 d和花后15 d高温胁迫下,半冬性品种烟农19具有较高的光合活性和较强的自我保护机制,春性品种郑麦9023最低。
关键词:  小麦  旗叶  高温胁迫  光合性能  叶绿素荧光
DOI:10.13610/j.cnki.1672-352x.20141225.024
投稿时间:2014-06-25
基金项目:国家“十二五”科技支撑计划(2011BAD16B06-3, 2012BAD04B09, 2012BAD14B13)资助。
Effect of high temperature on photosynthetic performance in wheat
ZHANG Peipei,HUANG Zhenglai,ZHANG Wenjing,WANG Qiang,LIU Mingchao
(School of Agronomy, Anhui Agricultural University, Hefei 230036)
Abstract:
The effect of high temperature on photosynthetic and chlorophyll fluorescence characteristics in different wheat varieties (emi-spring wheat cultivar: Huaimai 30, semi-spring wheat cultivar: zhengmai 9023, and semi-winter wheat cultivar: Yannong 19) was studied at the 7th and 15th day after anthesis. The results showed that after the seedlings were exposed to the high temperature (24℃/ 34℃,night/ day) at the 7th day after anthesis for 3 days, the net photosynthetic rate (Pn), stomata conductance (Gs), maximum quantum yield of PSII (Fv/Fm), photochemical quenching (qP), non-photochemical quenching (qn), and acyclic photosynthetic electron transfer rate of PSII (ETR) of Yannong 19 were significantly higher than those of Huaimai 30 and Zhengmai 9023 (P<0.05) and the Pn, Ci and Fo of Zhengmai 9023 were significantly higher than those of Huaimai 30, while the intercellular CO2 concentration (Ci) of Yannong 19 was significantly lower than that of Zhengmai 9023 and Huaimai 30. In addition, intercellular CO2 concentration (Ci), photochemical quenching (qP) and non-photochemical quenching (qn) of Huaimai 30 were significantly higher than those of Zhengmai 9023. After exposure to the high temperature (26℃/36℃, night/ day) at the 15th day after anthesis for 3 days, Pn, Gs, Ci, Fv/Fm, qP, qn and ETR of Yannong 19 were significantly higher than those of Huaimai30 and Zhengmai 9023 (P<0.05), while Fo of Yannong 19 was significantly lower than that of Huaimai 30 and Zhengmai 9023. In addition, Pn, Gs, Ci, Fv/Fm, qP and EYR of Zhengmai 9023 were significantly higher than those of Yannong 19. However, Fo of Zhengmai 9023 was significantly higher than that of Huaimai 30, and Fo of Huaimai 30 was significantly higher than that of Yannong 19. Therefore, under the high temperature stress at the 7th and 15th day after anthesis, semi-winter wheat cultivar (Yannong 19) had the highest photosynthetic activity and the best self-protection mechanism, followed by spring wheat cultivar (Huaimai 30), and semi-spring cultivar (Zhengmai 9023).
Key words:  wheat  flag leaf  high temperature stress  photosynthetic performance  chlorophyll fluorescence

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