摘要
通过太空诱变的方法,从凤仙花种子后代中获得了可遗传的仅顶花叶化的花逆转突变体.研究其光合特性发现,花逆转突变体植株的光补偿点、光饱和点和暗呼吸速率均比正常植株的低,表观量子产额与正常植株表观量子产额几乎相同.随着光照强度的增加,正常植株与突变体植株的胞间CO2浓度均降低,且幅度几乎相同;正常植株气孔导度增加的幅度大,突变体植株气孔导度的增加不明显.但在突变体植株气孔导度变化范围内,其胞间CO2浓度和净光合速率变化幅度与正常植株几乎相同.结果表明与正常植株相比,花逆转突变植株的光合特性有很大的不同.
The seeds of Impatiens balsamina L. were treated by space mutagenesis ,and heritable mutant plants with floral reversion occurring only in the apical flower were obtained in their descendant generation . An analysis of the photosynthetic traits discovered that compared with the normal plants the mutants had lower light saturation point ,light compensation point and dark respiration rate and that their apparent quantum yield was approximately equal to that of the normal plants .With increasing photosynthetic radiation ,intercellular CO2 concentration was reduced in both the normal and the mutant plants ,in a similar extent ,and stomatal conductance of the mutants varied only in a narrow extent compared with that of the normal plants .In the range of the variation in stomatal conductance of the mutant plants ,mutant plants and normal plants had almost the same extent of variation in intercellular CO 2 concentration and net photosynthesis rate .The above results suggested that the photosynthetic characters of the floral reversion mutant plants were quite different from those of the normal plants .
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第9期63-69,共7页
Journal of Southwest University(Natural Science Edition)
基金
四川省教育厅自然科学青年项目资助(11ZB026)
四川省科技厅应用基础项目资助(JY029205522)
四川省重点学科建设项目资助(SZD0420)
关键词
凤仙花
花逆转
光合特性
太空诱变突变体
Impatiens balsamina
floral reversion
photosynthetic character
space mutant
