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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (2): 255-257.

• 农学 农业基础科学 • 上一篇    下一篇

生长延缓剂对槟榔苗期叶绿素含量与叶绿素荧光参数的影响

杨福孙,符常明   

  • 收稿日期:2008-11-27 修回日期:2008-12-01 出版日期:2009-01-20 发布日期:2009-01-20

Effects of Plant Growth Retardants to Chlorophyll Content and Chlorophyll Fluorescence Parameters of Leaf in Betelnut(Areca catechu L.) Seedling Stage

Changming FU   

  • Received:2008-11-27 Revised:2008-12-01 Online:2009-01-20 Published:2009-01-20

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639

摘要： 为探讨生长延缓剂对槟榔苗期矮壮的光合特性。于2006年6-11月以移栽45天后海南槟榔为材料，通过喷施250mg/L与500mg/L多效唑、40mg/L和80 mg/L烯效唑及清水5个处理，研究其对槟榔苗期叶绿素含量及叶绿素荧光参数的影响。结果表明：喷施多效唑与烯效唑均能显著增加苗期槟榔叶绿素含量，且使叶绿素荧光参数Fv/Fo，Fv/Fm，qP显著增加，而降低qN、NPQ非光化学猝灭系数，并以250mg/L多效唑处理效果较明显。说明适当浓度的多效唑处理可增加PSII反应中心开放比例，推动光合电子传递，提高槟榔叶片光合性能，起到壮苗目的。

关键词: 马齿苋多糖, 马齿苋多糖, 超氧化物歧化酶, 丙二醛, 缺氧存活时间, 游泳时间

Abstract: To discuss the stocky efficiency of plant growth retardants, characteristics of betelnut(Areca catechu L.) photosysthesis in seedling stage were studied. Field experiments with Hainan betelnut were conducted with 5 treatments , including 250mg/L and 500mg/L of paclobutrazol(PP333)、40mg/L and 80 mg/L of uniconazole (S3307)、natural water(CK)) fromJune to November in 2006 after transplanted 45 days. The content of chlorophyll and chlorophyll fluorescence parameters of leaf in betelnut were investigated under different plant growth retardant treatments. The results showed that the content of chlorophyll、the potential activities of PSⅡ(Fv/Fo),conversion eficiency of primary light energy of PSⅡ(Fv/Fm) and photochemical quenching coefficient(qP)were distinctly enhanced，but the non-photochemical quenching coeficient(qN) and NPQ (non-photochemical quenching ) were decreased. 250 mg/L of PP333 was obvious. The conclusion was that the optimum PP333 concentration can add the open proportion of PSⅡ reaction center,promote photosynthetic electron transport,enhance the ability of photosynthetic electron transport,promote photostructure,and strengthen the sturdy stem of betelnut.