1 材料与方法
1.1 材料
1.2 方法
2 结果与分析
2.1 黑喉石斛DoFT1基因序列全长克隆及分析
图3 黑喉石斛DoFT1氨基酸序列与其近缘植物同源序列比对DcFT:铁皮石斛(XP_020702366.1);PeFT:小兰屿蝴蝶兰(XP_020576922.1);具有一致性和相似性的氨基酸分别用深蓝色和浅蓝色表示;方框为PEBP家族蛋白和FT蛋白保守结构域,Y为FT蛋白关键保守氨基酸位点Tyr84。 Fig. 3 Alignment of amino acid sequences of DoFT1 with those of FT orthologs from similar plant species DcFT: Dendrobium catenatum (XP_020702366.1); PeFT: Phalaenopsis equestris (XP_020576922.1); The identity and similarity amino acid sequences are marked by dark blue and light blue, respectively. The boxes are conservative elements of PEBP protein family and FT protein, the Y are key conservative amino acid sites Tyr84 of FT protein. |
2.2 黑喉石斛DoFT1基因氨基酸序列进化分析
图4 不同植物FT氨基酸序列进化树分析PeFT:毛竹(AQQ11797.1); AcFT:菠萝(XP_020088329.1);MaFT:小果野芭蕉(XP_009399098.1); NtFT:水仙(ALB24942.1);TgFT:郁金香(ATU06686.1);DcFT:铁皮石斛(XP_020702366.1);PeFT:小兰屿蝴蝶兰(XP_020576922.1);BnFT:油菜(XP_013722380.2);PtFT:毛白杨(AFU08240.1);RcFT:月季(XP_024196701.1);PbFT:白梨(NP_001289254.1);MdFT:苹果(NP_001280791.1)。 Fig. 4 Phylogenetic analysis of DoFT1 and other plants PeFT: Phyllostachys edulis (AQQ11797.1); AcFT: Ananas comosus (XP_020088329.1); MaFT: Musa acuminate (XP_009399098.1); NtFT: Narcissus tazetta (ALB24942.1); TgFT: Tulipa gesneriana (ATU06686.1); DcFT: Dendrobium catenatum (XP_020702366.1); PeFT: Phalaenopsis equestris (XP_020576922.1); BnFT: Brassica napus (XP_013722380.2); PtFT: Populus tomentosa (AFU08240.1); RcFT: Rosa chinensis (XP_024196701.1); PbFT: Pyrus × bretschneideri (NP_001289254.1); MdFT: Malus domestica (NP_001280791.1). |
2.3 黑喉石斛DoFT1基因表达模式
图5 黑喉石斛不同阶段形态特征VGP:营养生长期;FDBP:花芽分化期;FBP:花芽形成期;FP:开花期;F:花器官;L1:花芽形成期叶片;L2:开花期叶片;Fb:花芽。 Fig. 5 Morphological characteristics of D. ochreatum at different developmental stage VGP: Vegetative growth phase; FDBP: Flower bud differentiation phase; FBP: Flower bud phase; FP: Flowering phase; F: Flowers; L1: Leaves at FBP stage; L2: Leaves at FP stage; Fb: Flower bud. |
图6 黑喉石斛不同阶段叶片中DoFT1表达量分析VGP:营养生长期;FDBP:花芽分化期;FBP:花芽形成期;FP:开花期。 Fig. 6 Expression level of DoFT1 in leaf tissues of D. ochreatum at different developmental stage VGP: Vegetative growth phase; FDBP: Flower bud differentiation phase; FBP: Flower bud phase; FP: Flowering phase. |
2.4 黑喉石斛DoFT1基因遗传转化烟草及转化植株的表型分析
图8 转DoFT1基因烟草鉴定A:转基因烟草PCR鉴定;B:转基因烟草gus组织化学检测;M:Maker;P:阳性对照;N:阴性对照;1~4:转35S::DoFT1基因烟草植株;TP:转35S::DoFT1基因烟草植株;WT:野生型烟草植株。 Fig. 8 Identification of transgenic tobacco 35S::DoFT1 A: The PCR identification of transgenic tobacco plants; B: The gus histochemical identification of transgenic tobacco plants; M: Maker; P: Positive control; N: Negative control; 1-4: 35S::DoFT1 transgenic tobacco plants; TP: 35S::DoFT1 transgenic tobacco plants; WT: Wild-type tobaccos. |
图9 转DoFT1基因烟草与野生型开花性状对比TP:转35S::DoFT1基因烟草植株;WT:野生型烟草植株。 Fig. 9 Comparison of flowering traits between transgenic tobacco 35S::DoFT1 and wild-type TP: 35S::DoFT1 transgenic tobacco plants; WT: Wild-type tobaccos. |
表1 开花期间2种基因型烟草开花情况对比Tab. 1 Comparison of flowering situation between transgenic tobacco 35S::DoFT1 and wild-type during flowering phase |
| 花期天数 Flowering phase days/d | 开花植株数Numbers of flowering plants | |
|---|---|---|
| TP | WT | |
| 1 | 1 | 0 |
| 15 | 5 | 1 |
| 25 | 14 | 8 |
| 38 | 20 | 10 |
注:TP:转35S::DoFT1基因烟草植株;WT:野生型烟草植株。 | |
Note: TP: 35S::DoFT1 transgenic tobacco plants; WT: Wild- type tobaccos. |
