摘要
以籼粳杂交后代(F13)中具有高、中、低气孔密度叶片的品系为试材,研究了不同品系对光强和CO2浓度处理下的光合特征以及Rubisco酶活性,以期揭示气孔性状对光强和CO2浓度响应机制以及与Rubisco酶活性的相关性。结果表明:在光响应中,高气孔密度水稻的最大光合速率为24.6μmol·m-2·s-1,比中、低气孔密度水稻分别高4.3%和19.6%。在CO2响应中,高气孔密度水稻的最大光合速率为30.8μmol·m-2·s-1,比中、低气孔密度水稻分别高4.6%和9.5%。此外,不同气孔密度水稻的Rubisco酶活性与气孔密度变化相一致,呈极显著正相关(r=0.912,P<0.01)。因此叶片气孔密度的增加有利于提高光能和CO2利用效率。本研究结果为进一步从籼粳交后代中选育高光效材料提供理论依据。
Three rice lines with different leaf stomata density（ high,medium and low stomata density） derived from generations of hybrids between indica and japonica rice（ F13） were used to study their photosynthetic Three rice lines with different leaf stomata density（ high,medium and low stomata density） derived from generations of hybrids between indica and japonica rice（ F13） were used to study their photosynthetic characteristics and Rubisco activity. The aim is to reveal the response of stomatal to light intensity and CO2 concentration and the correlation between stomatal and Rubisco activity. Results showed that in light response,the maximum photosynthetic rate of the lines with high stomatal density was 24. 6 μmol·m^-2·s^-1,being 4. 3% and 19. 6% higher than those with medium and low stomatal density,respectively. And in CO2 response,the maximum photosynthetic rate of lines with high stomatal density was 30. 8 μmol·m^-2·s^-1,being 4. 6% and 9. 5% higher than those with medium and low stomatal density,respectively. In addition,Rubisco activity was significantly positive correlation（ r = 0. 912,P〈 0. 01） with stomatal density. In conclusion,the increasing stomatal density will enhance the utilization efficiency of light and CO2. This study provides theoretical basis for breeding high photosynthetic efficiency from generations of hybrids between indica and japonica rice. characteristics and Rubisco activity. The aim is to reveal the response of stomatal to light intensity and CO2 concentration and the correlation between stomatal and Rubisco activity. Results showed that in light response,the maximum photosynthetic rate of the lines with high stomatal density was 24. 6 μmol·m^-2·s^-1,being 4. 3% and 19. 6% higher than those with medium and low stomatal density,respectively. And in CO2 response,the maximum photosynthetic rate of lines with high stomatal density was 30. 8 μmol·m^-2·s^-1,being 4. 6% and 9. 5% higher than those with medium and low stomatal density,respectively. In addition
出处
《核农学报》
CAS
CSCD
北大核心
2015年第6期1142-1148,共7页
Journal of Nuclear Agricultural Sciences
基金
国家自然科学基金(31371857)
