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苯丙烯酸对黄瓜幼苗生理特性的影响

吴凤芝1,2;潘凯1;周秀艳1   

  1. 1东北农业大学,哈尔滨150030;2东北林业大学,哈尔滨 150040
  • 收稿日期:2003-07-23 修回日期:2003-12-21 出版日期:2005-05-18

Effects of cinnamic acid on physiological characteristics of Cucumis sativus seedling

WU Fengzhi1,2,PAN Kai1,ZHOU Xiuyan1   

  1. 1Northeast Agricultural University,Harbin 150030,China;2Northeast Forestry University,Harbin 150040,China
  • Received:2003-07-23 Revised:2003-12-21 Online:2005-05-18

摘要: 采用基质栽培模拟实验,研究了不同浓度苯丙烯酸对黄瓜幼苗生理特性的影响.结果表明,苯丙烯酸对黄瓜幼苗的光合色素、光合速率、蒸腾速率和根系活力产生了抑制作用.当处理浓度为25 μmol·L-1时,对类胡萝卜素产生抑制作用,对叶绿素a、叶绿素b为促进作用;当浓度为50 μmol·L-1时,对光合速率、蒸腾速率和根系活力均产生显著的抑制作用(P<0.05),并随着处理浓度的增加抑制作用增强;当浓度为150 μmol·L-1时,对叶绿素a、叶绿素b产生显著抑制作用(P<0.05);随着处理浓度的增加,对黄瓜上述生理特性的抑制作用增强.低浓度苯丙烯酸(25~50 μmol·L-1)对幼苗根系活力的抑制强度不大,可在处理后期得到恢复;高浓度(100~150 μmol·L-1)处理则表现出显著的抑制作用,随着处理时间延长,抑制作用增强(P<0.05).

关键词: 草地景观, 景观格局, 生物多样性, 景观退化与恢复, 景观美学价值

Abstract: With substrate culture,this paper studied the effects of different concentrations of cinnamic acid on the physiological characteristics of Cucumis sativus seedling.The results showed that 25 μmol·L-1 of cinnamic acid had an inhibition effect on carotenoids,but a promotion effect on chlorophyll a and b.50 μmol·L-1 of this compound could significantly inhibit the photosynthetic rate,transpiration rate and root activity (P<0.05),and this effect was getting stronger when the concentration was higher.150 μmol cinnamic acid·L-1 had a significant inhibition effect on chlorophyll a and b (P<0.05).Cinnamic acid had a weak inhibition effect on root activity when its concentration was low(25~50 μmol ·L-1),but the effect was significant when the concentration was high (100~150 μmol·L-1),which became stronger with the longer handling time (P<0.05).

Key words: Grassland landscape, Landscape pattern, Biodiversity, Landscape degradation and restoration, Landscape aesthetic value