缺硫胁迫对水稻叶绿素荧光动力学的影响

基金项目:

福建省科技厅计划项目(2001I011);国际硫研究所资助项目

Effect of S-deficiency stress on chlorophyll fluorescence kinetics of rice leaves

1.
Soil and Fertilizer Institude, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China;
2.
Biotechnology Center, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China

摘要: 采用水培的方法,对缺硫水稻叶片的光合特性进行了研究.结果表明,在缺硫情况下,水稻叶片的光合色素含量、净光合速率(Pn)、初始荧光(Fo)、光化学效率(Fv/Fm)、有效光化学效率(F'v/F'm)、实际光化学效率ΦPSⅡ和电子传递速率(ETR)显著下降,非光化学能量耗散(NPQ)增加,缺硫水稻的光合能力降低.PSⅡ反应中心破坏或可逆性失活没有造成水稻叶绿素PSⅡ活性降低,而非光化学能量耗散增加造成了缺硫水稻Fo下降,这很可能是水稻植株适应缺硫逆境的一种机制.
- 水稻 /
- 缺硫胁迫 /
- 叶绿素荧光
Abstract: Effect of S-deficiency on the characteristics of rice leaf photosynthesis was studied by using water culture.The results showed that under the S-deficiency condition,net photosynthetic rate(Pn),initial fluorescence value(Fo),ratio of the variable to maximum fluorescence(Fv/ Fm),actual photochemical efficiency(ФPSⅡ)and electron transport rate(ETR)in the leaves decreased significantly,non-photochemical quenching coefficient(NPQ)increased,and capability of photosynthesis decreased.Either destruction of PSⅡreaction center or reversible activity loss did not decrease the PSⅡactivity of the leaf.Increase of NPQ caused the decrease of Fo in S-deficient rice,and this might be a mechanism for the rice to adapt itself under adversity of S-deficiency.
- rice /
- S-deficiency stress /
- chlorophyll fluorescence

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