The chlorophyll content, photosynthetic rate, sugar and sucrose contents, POD enzyme activity of rice mutant (CA648, performing a dwarf and multi-tillering phenotype) and wild type ZH11 were preliminary studied. The results showed that the chlorophyll content of ZH11 was higher than that of CA648 at tillering stage. At the early stage of tillering, the net photosynthetic rate, stomatal conductance, and transpiration rate of CA648 were lower than those of ZH11, but intercellular CO2 concentration in CA648 was higher than that in ZH11. At the top tillering stage (20 d after tillering stage), the significant difference of the net photosynthetic rates of two kinds of material was found. The net photosynthetic rate of ZH11 was about 17.5% higher than CA648. Meanwhile, stomatal conductance, transpiration rate and intercellular CO2 concentration of ZH11 were also higher than those of CA648. At the late tillering stage, the net photosynthetic rates of ZH11 and CA648 were almost the same. At the top tillering stage, reducing sugar content in CA648 leaf was significantly higher than the control, while there was no difference of reducing sugar content in the two kinds of stems. The sucrose content of leaf in CA648 was lower than the control, about 77.5% of ZH11, while the sucrose content in the stem was 30.7% higher than ZH11. There were obvious differences of POD enzyme activity between two kinds of material. At the mid-tillering stage, the POD activities in leaf and stem of CA648 were 73.0% and 16.8% higher than those in ZH11, respectively.
LIU Xiao-peng
,
ZHU Yun-hua
,
LIU Qing
,
SHI Qi
,
LI He-song
. Photosynthetic Physiological Analysis on Dwarf Multi-Tillering Rice Mutant CA648[J]. Subtropical Plant Science, 2015
, 44(01)
: 18
-22
.
DOI: 10.3969/j.issn.1009-7791.2015.01.004
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