Chlorophyll fluorescence parameters of Phyllostachys violascens with phosphorus treatments
-
摘要: 为了解不同磷水平下雷竹Phyllostachys violascens幼苗叶片叶绿素荧光特性的变化,试验以无性繁殖的雷竹幼苗作为试验材料,采用砂培试验方法,研究了不同磷水平(0,0.5,5.0,50.0,500.0 mgL-1)对雷竹幼苗叶绿素荧光参数和光通量密度?鄄光合电子传递速率(PAR-ETR)响应曲线的影响。结果表明,随着磷质量浓度的升高,幼苗叶片潜在光化学活性(Fo /Fm)呈逐渐降低趋势,最大光化学效率(Fv /Fm)在0~50.0 mgL-1磷质量浓度范围内逐渐下降。磷质量浓度为5.0 mgL-1时,初始荧光(Fo),最大荧光(Fm),适时最小荧光(Ft)和可变荧光(Fv)均达到最大值,电子传递速率(ETR)和光系统Ⅱ(PSⅡ)实际光化学效率(Y)较大,光化学猝灭系数(qP)和非光化学猝灭系数(qN和NPQ)相对较低,说明在5.0 mgL-1磷质量浓度下,雷竹幼苗叶片的光合能力较强,接近适宜雷竹幼苗生长的磷质量浓度。磷质量浓度过高(50.0和500.0 mgL-1)均导致雷竹幼苗叶片ETR下降,热耗散增加,光化学效率和光量子产额降低。图1表3参20
-
关键词:
- 植物生理学 /
- 雷竹 /
- 磷 /
- 叶绿素荧光 /
- 光通量密度-光合电子传递速率(PAR-ETR)响应曲线
Abstract: To understand the effect of different phosphorus (P) on leaves photosynthesis in Phyllostachys violascens,P treatments of 0,0.5,5.0,50.0 and 500.0 mgL-1;chlorophyll fluorescence parameters;and photosynthetic active radiation-electron transport rate (PAR-ETR) response curves of one-year old Phyllostachys violascens were studied through a sand-pot experiment. Results showed that as P increased and potential photoreception activity (Fo /Fm) decreased,the maximal photochemical efficiency (Fv /Fm) dropped (P<0.05) in the range of 0 - 50.0 mgL-1 P. The chlorophyll fluorescence basal rate (Fo),maximum chlorophyll fluorescence (Fm),timely minimum fluorescence (Ft) and variable fluorescence (Fv) were highest (P<0.05) with 5.0 mgL-1 P. In addition,ETR and the actual photochemical rate of PSⅡ (Yield) were higher,but photochemical dissipation (qP),non-photochemical dissipation (qN),and non-photochemical quenching (NPQ) coefficients were lower (P<0.05) with 5.0 mgL-1 P. Higher or lower P concentration than 5.0 mgL-1 caused ETR to decrease,heat dissipation to increase,the photochemical effect to decrease,and quantum yield to decrease. Accordingly,the biological yield of Phyllostachys violascens decreased,and the Apase activity increased. Therefore,P concentration of 5.0 mgL-1 was appropriate for growth of Phyllostachys violascens in a sand-pot incubation.[Ch,1 fig. 3 tab. 20 ref.] -
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2013.01.002

计量
- 文章访问数: 3349
- HTML全文浏览量: 289
- PDF下载量: 1157
- 被引次数: 0