根系浸泡生长素对橄榄幼苗生长及其叶绿素荧光特性的影响
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引用本文:叶清华,王 威,谢 倩,陈清西.根系浸泡生长素对橄榄幼苗生长及其叶绿素荧光特性的影响[J].西北植物学报,2019,39(5):831~839
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作者单位
叶清华,王 威,谢 倩,陈清西* (福建农林大学 园艺学院福州 350002) 
基金项目:福建农林大学科技创新专项(CXZX2017186)
中文摘要:以1~2片真叶的橄榄健康幼苗为试材,研究2种外源生长素吲哚丁酸(IBA)和萘乙酸(NAA)在不同浓度(100、300 和500 μmol/L)及不同处理时间(1、3和5 h)下对橄榄幼苗根系和地上部生长量的影响,并运用隶属函数法进行综合评价,对测定排名前5个处理的橄榄幼苗的叶绿素荧光特性进行分析,以探寻促进橄榄幼苗生长的最佳处理,为橄榄实生砧木苗繁育提供理论及技术依据。结果显示:(1)外源生长素能促进橄榄幼苗生长,改善根系构型,以低浓度处理和高浓度短时长的处理表现较好,能提高橄榄幼苗生长势。(2)隶属函数分析橄榄幼苗生长的综合效果排名前五的处理为:N3001>N5001>N1005>N1001>I3003,前4个均为NAA处理,平均隶属函数值均大于0.65,且对株高、茎粗、地上部生物量、总根长、总根表面积、主根长及侧根数的促进作用比IBA大。(3)叶绿素荧光特性显示,N1001处理的橄榄幼苗实际光化学量子效率Y(Ⅱ)最高且比对照显著增加了8.16%,光合电子传递速率ETR最大,非光化学淬灭系数NPQ最低且比CK显著降低了23.78%(P<0.05)。研究表明,N1001为促进橄榄幼苗生长的最佳处理,即选择100 μmol/L外源生长素NAA处理橄榄实生砧木苗根系1 h,能显著促进植株生长,提高幼苗的光能利用率和光合能力。
中文关键词:吲哚丁酸(IBA)  萘乙酸(NAA)  橄榄  根系构型参数  隶属函数值(MFV)  叶绿素荧光
 
Effect of Root Soaked with Auxins on the Growth and Chlorophyll Fluorescence Characteristics of Chinese Olive Seedlings
Abstract:1-2 true leaves of Chinese olive healthy seedlings as experimental materials, seedlings roots were dipped in different solutions. We studied the effects of two kinds of exogenous auxin Indole 3 butyric acid (IBA) and 1 naphthylacetic acetic acid (NAA) at different concentrations (100, 300 and 500 μmol/L) and the processing time (1, 3, 5 h) on the growth of roots and shoots of Chinese olive seedlings. The method of membership grade function was used to carry on the comprehensive evaluation. Further more, we measured chlorophyll fluorescence characteristics of seedlings of the top five processing, to find the best treatment to promote growth of Chinese olive seedlings and provide a theoretical and technical reference for propagation of Chinese olive rootstock seedlings. Results showed that: (1) exogenous auxin could promote the growth of Chinese olive seedlings and improve root system architecture. Treatments with low concentration and high concentration for short durations had some better performances. They could enhance the growth potential of Chinese olive seedlings. (2) According to the comprehensive effect of membership function analysis on the growth of Chinese olive seedlings, the top five treatments were N3001>N5001>N1005>N1001>I3003. The first four treatments were all treated with NAA, which average membership function values were all greater than 0.65. Results showed the promotion of plant height, stem diameter, aboveground biomass, total root length, total root surface area, main root length and lateral root number under NAA treatment were greater compared with IBA treatment. (3) The chlorophyll fluorescence characteristics showed that Y(Ⅱ) of Chinese olive seedlings treated with N1001 was the highest, which was 8.16% higher than that of the control, ETR was the highest, NPQ was the lowest and significantly lower than CK by 23.78% (P<0.05). Therefore, Chinese olive seedlings under N1001 treatment was optimal. That is Chinese olive seedling roots treated for one hour with 100 μmol/L NAA, which significantly promoted the plant growth, and improved the utilization rate of light energy and the photosynthetic ability.
keywords:Indole 3 butyric acid (IBA)  1 naphthylacetic acid (NAA)  Chinese olive [Canarium album (Lour.) Raeusch.]  root architecture parameter  membership function value (MFV)  chlorophyll fluorescence
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