Page 79 - 《广西植物》2020年第3期
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3 期            杨珊等: 外来红树植物拉关木对乡土种桐花树和正红树的化感作用研究                                            3 5 9


                          表 1  拉关木水浸提液对受体植物胚轴、种子萌发的影响
    Table 1  Effects of aqueous extract of Laguncularia racemosa on the hypocotyls and seeds germination of recipient plants

                           处理                 萌发率       萌发指数         芽长          根长        生物量
       树种
                         Treatment           Germination  Germination  Bud length  Root length  Biomass
      Species
                              -1
                         (gmL )          percentage (%)  index     (cm)       (cm)        (g)
      桐花树            对照 CK            0     45.83±11.79a  0.15±0.04a  9.63±2.05a  11.27±3.23a  0.59±0.27a
      Aegiceras     根水浸提液
     corniculatum                    0.1    25.00±0.00a  0.07±0.01b  9.39±2.11a  7.57±2.66bc  1.14±0.89a
                  Root aqueous extract
                                     0.3    41.67±11.79a  0.10±0.03ab  9.57±2.47a  5.73±2.17c  0.60±0.31a
                                     0.5    45.83±11.79a  0.12±0.03ab  9.98±3.25a  5.80±2.83c  0.64±0.47a
                    叶水浸提液            0.1    29.17±11.79a  0.08±0.03b  8.61±1.21a  8.58±2.85b  0.89±0.48a
                  Leaf aqueous extract
                                     0.3    33.33±5.89a  0.08±0.02b  8.81±1.34a  6.12±2.26c  0.63±0.37a
                                     0.5    45.83±11.79a  0.12±0.04ab  8.82±1.77a  6.42±2.17c  0.46±0.01a
      正红树            对照 CK            0     87.50±10.21a  0.15±0.02a  7.87±2.95b  6.33±1.57b  1.02±0.32c
     Rhizophora     根水浸提液
      apiculata                      0.1    95.83±5.89a  0.16±0.02a  12.18±4.56a  7.23±1.59b  1.34±0.42b
                  Root aqueous extract
                                     0.3    100.00±0.00a  0.20±0.01a  12.43±3.98a  8.76±0.92a  1.58±0.47a
                                     0.5    91.67±5.89a  0.17±0.01a  9.48±3.41b  9.37±1.81a  1.24±0.42bc
                    叶水浸提液            0.1    100.00±0.00a  0.19±0.01a  10.63±3.23ab  6.54±1.43b  1.45±0.34ab
                  Leaf aqueous extract
                                     0.3    100.00±0.00a  0.20±0.01a  10.36±4.07ab  7.51±1.36b  1.51±0.47ab
                                     0.5    91.67±5.89a  0.16±0.04a  8.21±5.66b  7.48±1.21b  1.08±0.39c

     注: 表中数值为平均值±标准差ꎬ同一列中不同字母表示各处理间差异显著(P<0.05)ꎮ
     Note: The values in the table are x±sꎬ and the different letters in the same column indicate significant differences among treatments (P<
   0.05).
               表 2  拉关木水浸提液对桐花树种子和正红树胚轴萌发的化感效应指数(RI)比较
     Table 2  Comparison of allelopathic effect index (RI) of Laguncularia racemosa aqueous extract on germination of
                         Aegiceras corniculatum seeds and Rhizophora apiculata hypocotyls
                                                           芽长       根长
                           处理             萌发率    萌发指数                       生物量
        树种                                                  Bud     Root
                         Treatment      Germination Germination             Biomass  SE1      SE2
        Species                                            length   length
                              -1
                         (gmL )      percentage(%)  index                  (g)
                                                           (cm)     (cm)
        桐花树         根水浸提液          0        0       0        0       0        0       0      -0.099
       Aegiceras  Root aqueous extract
      corniculatum                0.1     -0.455  -0.556   -0.026  -0.329   0.929   -0.087
                                  0.3     -0.091  -0.356   -0.006  -0.492   0.017   -0.186
                                  0.5     0.000   -0.240   0.035   -0.485   0.074   -0.123
                    叶水浸提液          0        0       0        0       0        0       0      -0.146
                  Leaf aqueous extract
                                  0.1     -0.364  -0.487   -0.106  -0.239   0.499   -0.139
                                  0.3     -0.273  -0.484   -0.086  -0.457   0.061   -0.248
                                  0.5     0.000   -0.246   -0.085  -0.430   -0.229  -0.198
        正红树         根水浸提液          0        0       0        0       0        0       0      0.210
       Rhizophora  Root aqueous extract
       apiculata                  0.1     0.095    0.078   0.548    0.141   0.311    0.235
                                  0.3     0.143    0.310   0.579    0.383   0.544    0.392
                                  0.5     0.048    0.113   0.205    0.480   0.216    0.212
                    叶水浸提液          0        0       0        0       0        0       0      0.152
                  Leaf aqueous extract
                                  0.1     0.143    0.283   0.351    0.032   0.417    0.245
                                  0.3     0.143    0.307   0.317    0.186   0.472    0.285
                                  0.5     0.048    0.065   0.044    0.182   0.044    0.077

     注: SE1 为同一器官同一浓度 RI 的算数平均值ꎬ SE2 为同一器官不同浓度的 SE1 算数平均值ꎮ
     Note: SE1 is the average value of the same concentration of RI in the same organꎬ and SE2 is the average value of SE1 in different concen ̄
   trations of the same organ.
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