超级稻两优培九生育后期的光能利用和同化产物分配  

Light Energy Conversion Efficiency and Assimilate Distribution of Indica-Japonica Subspecies Hybrid Rice Liangyoupeijiu at Late Stage

作　　者：张云华[1] 王荣富[1] 陈炳松[2] 于江龙[1] 钱立生[1] 沙莎[3] 

机构地区：[1]安徽农业大学生命科学学院,合肥230036 [2]江苏省农业科学院原子能所 [3]南京师范大学生命科学学院

出　　处：《安徽农业大学学报》2003年第3期269-272,共4页Journal of Anhui Agricultural University

基　　金：国家基础研究发展规划项目(G1998010100);安徽省自然科学基金项目(01041106)资助。

摘　　要：以籼、粳亚种间杂交稻两优培九及其父本9311为材料,测定了光合速率、叶绿素荧光参数及14CO2同化产物分配的指标。结果表明:在生育后期,与父本9311相比,两优培九具有较高的光合能力;在中午强光的逆境条件下,原初光化学效率(Fv/Fm)、光化学猝灭系数(qP)和PS 在照光下的实际光化学效率(ΦPS )的下降相对较少,具有较强的耐光抑制能力;用同位素14C对光合同化产物运转分配进行标记研究,发现两优培九光合同化产物向穗部的分配比率较高,具有较好的源库协调性。上述有关光合和同化产物的分配特点可能是超级稻高产的生理基础。Using indicajaponica subspecies hybrid rice Liangyoupeijiu and its male parent 9311 as the experimental materials, photosynthetic rate,chlorophyll fluorescence parameter,the indexes of 14CO2 assimilate distribution were measured. In comparison with 9311 at late development stage, Liangyoupeijiu was of higher photosynthetic capability, the decrease of primary photochemical efficiency (Fv/Fm), photochemical quenching (qP)and actually photochemical efficiency of PSⅡ with light (ΦPSⅡ) under the high light condition at noon, which demonstrated that Liangyoupeijiu was of tolerant to photoinhibition. Distribution ratio of photosynthetic assimilate to panicle were allhigher,which indicated that Liangyoupeijiu have better coordination of sourcesink in terms of the studies on photosynthetic assimilate using isotope. The above photosynthetic characteristics and assimilate distribution is possibly the physiological basis of superhigh yield in hybrid rice Liangyoupeijiu.

关 键 词：杂交稻 光合能力 耐光抑制 同化产物的分配 

分 类 号：S511.01[农业科学—作物学]