摘要
以滴水观音为试验材料,研究了低温环境下淹水处理对其叶绿素荧光的影响。种植滴水观音的花盆置于水箱中,利用水位调节阀调节箱内水位。试验设计为不淹水(对照组,正常浇水)、1/4淹水、2/4淹水、3/4淹水和全淹,分别于淹水后的第10、20、30、40、50天进行各项指标的测定。试验结果显示:1/4淹水处理植株叶绿素荧光参数均高于对照处理,初始荧光产量、最大荧光产量、最大光能转化效率、光化学猝灭系数和非光化学猝灭系数分别为对照的106.6%、104.8%、107.8%、105.0%、153.6%,差异显著(P<0.05);2/4淹水、3/4淹水、全淹组初始荧光产量、非光化学猝灭系数均高于对照组,最大荧光产量、最大光能转化效率和光化学猝灭系数均显著低于对照组,尤其全淹组分别低于对照组的20.4%、36.2%和17.2%。1/4淹水处理可提高滴水观音光合作用,高水位处理则抑制滴水观音生长。
In this study,we examined the effect of flooding stress on chlorophyll fluorescence of Alocasia macrorrhi-za at low temperature.Chlorophyll fluorescence parameters of Alocasia macrorrhiza in five groups,i.e.,the control group,1/4 submerged group,2/4 submerged group,3/4 submerged group and full submerged group,were meas-ured after 10,20,30,40,50 days of treatment,respectively.The results showed that chlorophyll fluorescence pa-rameters of 1/4 submerged group were higher than those of the control group.The initial fluorescence yield （F0 ）, maximum fluorescence yield （Fm ）,the maximum photochemical efficiency （Fv/Fm ）,photochemical quenching coefficient （qP）and non photochemical quenching coefficient （qN）were 106.6%,104.8%,107.8%,105%, 153.6% of those in the control group,respectively,with significant differences （P〈0.05 ）.The F0 and qN of 2/4,3/4 and full submerged groups were higher than those of the control group,while Fm,Fv/Fm and qP were all significantly lower than those of the control group,especially for full submerged group,which decreased by 20.4%,36.2%and 17.2%compared to the control group.It can be concluded that 1/4 submerged treatment will improve the photosynthesis of Alocasia macrorrhiza,but higher water level will restrain its growth.
出处
《水生态学杂志》
北大核心
2014年第4期55-59,共5页
Journal of Hydroecology
基金
重庆市教育委员会项目(KJ121215)
重庆市教委项目(KJ131207)
重庆市自然科学基金计划项目(cstc2013jcyjA20024)
关键词
低温
淹水处理
滴水观音
叶绿素荧光
low temperature
flooding stress
Alocasia macrorrhiza
chlorophyll fluorescence
