不同浸种处理和胁迫条件对神农架粉红杜鹃种子萌发的影响  

Effects of Different Soaking Treatments and Stress Conditions on Seed Germination of Rhododendron oreodoxa var.fargesii from Shennongjia

作　　者：李静[1,2] 赵凯歌 傅强[1,2] 谭大明 刘秀群[1,2] Li Jing;Zhao Kaige;Fu Qiang;Tan Daming;Liu Xiuqun(Huazhong Agricultural University,Wuhan 430070;National Key Lab.of Germplasm Innovation and Utilization of Fruit and Vegetable Horticultural Crops,Wuhan 430070;Institute of Vegetables Xizang Academy of Agricultural and Animal Husbandry Sciences,Lasa 850032)

机构地区：[1]华中农业大学,武汉430070 [2]果蔬园艺作物种质创新与利用全国重点实验室,武汉430070 [3]西藏自治区农牧科学院蔬菜研究所,拉萨850032

出　　处：《湖北林业科技》2025年第1期1-8,共8页Hubei Forestry Science and Technology

基　　金：西藏自治区科技计划项目中的重点研发及转化项目(项目编号:XZ202201ZY0006N)。

摘　　要：为探究不同浸种处理和胁迫条件对分布于神农架的高山杜鹃种类粉红杜鹃种子萌发的影响,采用蒸馏水不同温度及时长浸种、不同浓度GA 3溶液浸种、不同浓度NaCl溶液培养以及不同浓度PEG-6000溶液培养粉红杜鹃种子。结果表明,最适合粉红杜鹃种子萌发的蒸馏水浸种处理为35℃浸种24 h,发芽率达97.33%,发芽势达94.00%,发芽指数为7.80。2000 mg·L^(-1)的GA 3溶液浸种24 h,对粉红杜鹃种子萌发的促进效果最好,发芽率可达96.33%,发芽势为93.67%,发芽指数可达9.41。0.1%NaCl处理时,粉红杜鹃种子的发芽率为45.67%;0.4%NaCl处理时发芽率仅为6.67%;NaCl浓度超过于0.6%时完全不萌发。4%PEG-6000溶液对粉红杜鹃种子萌发的促进效果最佳,发芽率为94.67%,发芽势为91.67%,PEG-6000溶液浓度超过16%时,明显抑制粉红杜鹃种子的萌发和根系的伸长。本研究可为神农架粉红杜鹃种质资源的引种驯化及开发利用提供参考。To explore the effects of various seed imbibition treatments and stress conditions on the seed germination of R.oreodoxa var.fargesii from Shennongjia,the seeds of R.oreodoxa var.fargesii were imbibed with distilled water at different temperatures and time,imbibed with different concentrations of GA 3 solution,incubated with different concentrations of NaCl solution,and incubated with different concentrations of PEG-6000 solution.The results showed that the optimal conditions for germination was distilled water at 35℃for 24 h,which yielded a germination rate of 97.33%,a germination potential of 94.00%,and a germination index of 7.80.The best germination promotion effect for R.oreodoxa var.fargesii seed germination was achieved by GA 3 solution at 2000 mg·L^(-1) for 24 h,resulting in a germination rate of 96.33%,and a germination potential of 93.67%,with a germination index of 9.41.In terms of stress conditions,the germination rate of R.oreodoxa var.fargesii seeds was 45.67%with 0.1%NaCl treatment,dropping to 6.67%with 0.4%NaCl treatment,and no germination occurred at concentration of NaCl above 0.6%.The application of a 4%PEG-6000 solution had the more beneficial for germination,with a germination rate of 94.67%and a potential of germination of 91.67%.The germination potential of PEG-6000 was 9.67%,and the germination index of R.oreodoxa var.fargesii was 9.41.91.67%,PEG-6000 solution concentration more than 16%significantly inhibited R.oreodoxa var.fargesii seed germination and root elongation.This study provides valuable insights that could facilitate the introduction and domestication of azalea germplasm from Shennongjia.

关 键 词：粉红杜鹃 种子萌发 发芽率 浸种处理 胁迫条件 神农架 

分 类 号：S722.14[农业科学—林木遗传育种]