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为分析远缘杂交后代材料的高光效生理基础 ,测定了从热带地区筛选出的杂交高光效后代材料 SHP1(F2 )、SHP1- 1- 6 (F3 )、SHP1- 2 - 8(F3 )及其亲本 Azucena(O.sativa)与普通野生稻 (O.rufipogon) ,以及 3个对照品种 (O.sativa)的光合速率和气孔特性 ,分析了光合速率与气孔导度和气孔结构的关系。结果表明 3个高光效后代材料的光合速率和气孔密度及气孔乳突数显著高于其亲本及 3个栽培稻。相关分析表明 ,光合速率与气孔导度和气孔密度分别呈极显著、显著正相关 (相关指数分别为 R2 =0 .90 44 * * ,R2 =0 .810 0 * ) ,气孔密度与气孔导度表现出显著正相关 (R2 =0 .86 98* )。因此认为气孔是决定水稻光合速率的重要因子之一 ,通过与野生稻远缘杂交增加气孔密度可提高气孔导度 ,从而可能改善光合效率。
In order to analyze the physiological basis of high light efficiency of distant hybrid progenies, SHP1 (F2), SHP1-1-6 (F3), SHP1-2-8 (F3) The relationships between photosynthetic rate and stomatal conductance and stomatal structure were analyzed on the photosynthetic rate and stomatal characteristics of parents, Azucena (O.sativa) and O. rufipogon, and three control species (O.sativa). The results showed that the photosynthetic rate, stomatal density and number of stomata were significantly higher in the three high light efficiency progeny than their parents and three cultivated rice. Correlation analysis showed that there was a significant and significant positive correlation between photosynthetic rate and stomatal conductance and stomatal density (correlation index R2 = 0 .90 44 * *, R2 = 0 810 * 0 respectively), stomatal density and stomatal conductance Showed a significant positive correlation (R2 = 0.86 98 *). Therefore, stomata are considered as one of the most important factors that determine the photosynthetic rate of rice. Increasing stomatal density by distant crosses with wild rice can increase stomatal conductance and thus improve photosynthetic efficiency.