1、Effects of different soaking treatments on seed germination and seedling growth of Platycodon grandiflorum（不同浸種處理對(duì)桔梗種子萌發(fā)和幼苗生長(zhǎng)的影響） Since Platycodon grandiflorum has important economic value, in recent years, the rapid increase in social demand for Platycodon grandiflorum , Platycodon grandiflorum rel

2、y solely on wild resources can not meet market demand. Thus, in many areas it has been domesticated wild Platycodon grandiflorum , and began artificial cultivation. （由于桔梗具有重要的經(jīng)濟(jì)價(jià)值，近年來(lái)，社會(huì)對(duì)桔梗需求量迅速增加，僅依靠野生桔梗資源已經(jīng)不能滿足市場(chǎng)需求。 因此，許多地區(qū)已進(jìn)行野生桔梗馴化，并開(kāi)始人工種植。BackgroundThe current study suggests that, Platycodon gra

3、ndiflorum seeds without deep dormancy characteristics, but contains a high activity in the Platycodon grandiflorum seeds endogenous inhibitory substances, and the substance to a certain extent, affected the normal seed germination and seedling growth. Before sowing need on seed processing, increase

4、its vitality, in order to achieve the height of seedling and the foundation for strengthening seedling.(而目前的研究認(rèn)為，桔梗種子無(wú)深沉休眠的特性，但是在桔梗種子內(nèi)含有較高活性的內(nèi)源抑制物質(zhì)，而該物質(zhì)在一定程度上影響種子的正常萌發(fā)與幼苗生長(zhǎng)。在播種前需對(duì)桔梗種子進(jìn)行處理，提高其活力，以達(dá)到苗齊、苗全和苗壯。）Objective ： To investigate the effects of different soaking treatments by KNO3, KMnO4, H2O2,

5、GA3, and distilled water for different times on seed germination and seedling growth of Platycodon grandiflorum.（研究不同質(zhì)量濃度的KNO3、KMnO4、H2O2、GA3 以及蒸餾水浸種不同時(shí)間，對(duì)桔梗種子萌發(fā)及幼苗生長(zhǎng)的影響）Methods ： Adopting a double-layer filter paper culture method, the seeds were cultured in the 12 h illumination light incubator at

6、 25 , and the germination energy, germination percentage, germination index of the seeds, and the root length and the shoot height of the seedling were recorded. Then the data were analyzed.（方法： 采用雙層濾紙培養(yǎng)法，在25 恒溫，12 h 光照的光照培養(yǎng)箱中將浸種后的種子進(jìn)行培養(yǎng)，觀察記錄種子的發(fā)芽勢(shì)、發(fā)芽率、發(fā)芽指數(shù)及幼苗的根長(zhǎng)和苗高，并對(duì)數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析）Results ： The best soa

7、king treatment to break seed dormancy, promote the seed germination, and improve the seedling growth of P.grandiflorum was with 0.150 g/L GA3 for 24 h. In addition, another effective soaking treatment is using 0.005 g/mL KNO3 for 12 h.（結(jié)果 ：0.150 g/L GA3 浸種24 h 是打破桔梗種子休眠、促進(jìn)桔梗種子萌發(fā)和幼苗生長(zhǎng)的最佳浸種處理方法；此外，5 m

8、g/mL KNO3 浸種處理12 h 也是有效的浸種處理方法。）Highlights ： With the different concentrations of 4 kinds of chemical reagent and distilled water of Platycodon grandiflorum seeds of different soaking time, compares their on Platycodon grandiflorum seed germination and seedling growth, in order to screened effective, simple and Platycodon