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9 期                刘玉婷等: 水华蓝藻———蒙氏浮丝藻的多相特征及分子系统研究                                         1 5 2 3

                                   表 1  WZU2314 及其相似藻株序列 16S rRNA 相似度比较
                   Table 1  Comparison of 16S rRNA sequence similarity between WZU2314 and its similar algal strains
             菌株
                                    GenBank  1  2   3   4   5   6  7   8   9   10  11  12  13  14  15  16  17
             Strain
             1. WZU2314               -     -   -   -   -   -   -  -   -   -   -   -   -   -   -   -   -   -
             2. Planktothrix mougeotii HAB002  FJ184392.1  99.91  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
             3. P. mougeotii TK4 ̄5  AB045969.1  99.74 99.66  -  -  -  -  -  -  -  -  -  -  -   -   -   -   -

             4. P. mougeotii PMC 1114.19  OQ693661.1  99.74 99.83 99.48  -  -  -  -  -  -  -  -  -  -  -  -  -  -
             5. P. mougeotii CMAA1557  KY873316.1  99.48 99.48 99.23 99.31  -  -  -  -  -  -  -  -  -  -  -  -  -
             6. P. tepida          NR 177724.1 98.62 98.70 98.53 98.62 98.44  -  -  -  -  -  -  -  -  -  -  -  -
             7. P. serta           NR 177723.1 97.39 97.30 97.30 97.12 97.12 98.18  -  -  -  -  -  -  -  -  -  -  -

             8. P. spiroides strain fs1  NR 118104.1 96.94 97.03 96.67 96.85 97.03 97.21 96.40  -  -  -  -  -  -  -  -  -  -
             9. P. pseudagardhii NIES ̄914  FJ184389.1  96.94 97.03 96.67 96.85 96.85 96.94 96.13 98.96  -  -  -  -  -  -  -  -  -

             10. P. pseudagardhii HAB1129  GQ457309.1  96.94 97.03 96.67 96.85 96.85 96.94 96.13 98.96  100  -  -  -  -  -  -  -  -
             11. P. spiroides nh4  HQ912983.1 96.85 96.94 96.58 96.76 96.94 97.12 96.31 99.91 98.88 98.88  -  -  -  -  -  -  -
             12. P. rubescens NIVA ̄CYA 18  AB045925.1  96.57 96.66 96.30 96.48 96.48 97.37 96.93 96.49 95.76 95.76 96.40  -  -  -  -  -  -
             13. P. rubescens strain BC ̄Pla 9303  AJ132251.1  96.57 96.66 96.30 96.48 96.48 97.37 96.93 96.49 95.76 95.76 96.40  100  -  -  -  -  -

             14. P. paucivesiculata  NR 177722.1 96.40 96.31 96.31 96.12 96.31 96.84 97.30 96.31 96.22 96.22 96.22 98.26 98.26  -  -  -  -
             15. P. suspensa SAG 5.81  KM019973.1 96.39 96.49 96.12 96.30 96.30 97.29 96.85 96.31 95.58 95.58 96.22 99.83 99.83 98.09  -  -  -

             16. P. agardhii PCC 9801  GQ351571.1  96.39 96.49 96.12 96.30 96.30 97.29 96.85 96.31 95.58 95.58 96.22 99.83 99.83 98.09  100  -  -
             17. P. agardhii NIES ̄595  AB045957.1  96.39 96.48 96.12 96.30 96.30 97.29 96.84 96.31 95.58 95.58 96.22 99.83 99.83 98.09  100  100  -
             18. P. iranica        NR 177898.1 96.22 96.22 96.13 96.03 96.22 97.11 97.21 96.13 95.85 95.85 96.04 98.62 98.70 98.70 98.53 98.53 98.53



                                    表 2  浮丝藻属的 16S-23S rRNA 内转录间隔区的分析
                                   Table 2  Analysis of 16S-23S rRNA ITS region of Planktothrix

             菌株                             Complete  D1 ̄D1′              Box ̄B  Box ̄A           V3
                                   GenBank    ITS    helix  tRNA  Ile  tRNA Ala  helix  helix  D4  helix  D5
             Strain
                                              (nt)   (nt)                  (nt)   (nt)          (nt)
             WZU2314                  -       368     64     +      -      36      12     4      18     14

             P. mougeotii CMAA1557  KY873316.1  380   64     +      -      36      12     4      15     14
             P. pseudagardhii No980  KU574115.1  539  63     +      -      35      12     7      14     15

             P. rubescens NIVA ̄CYA 18  GQ995022.1  308  62   +      -      38      12     4      20     13
             P. agardhii PCC 9801  GQ351571.1  542    63     +      -      38      12     7      20     14
             P. iranica AS S8A clone cl4  MF360987.1  337  64  +    -      38      6      4      12     10



            阿氏浮丝藻和粉红浮丝藻形状相同ꎬ具有相同碱                              出显著的可变性ꎬ无论是构型走势还是碱基排列
            基排列的基部茎和 1 个中间双侧凸 起 ( 2 ∶ 2)ꎮ                      均有较大差异ꎬ说明该螺旋结构在属内物种间特
            WZU2314 与同属其他藻株在 V3 螺旋结构中表现                        异性较强ꎬ是区分不同物种的重要特征(图 6)ꎮ
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