【摘要】 为明确一品红国庆促成栽培短日照期间的适宜夜温,本试验以一品红中国红为试材,研究短日照期间不同的夜温处理(18、21、24、27℃)对一品红开花和花色素苷、叶绿素、可溶性糖含量及苯丙氨酸解氨酶(PAL)活性的影响。结果表明:短日照期间的夜温对一品红的开花进程、观赏品质以及苞片的花色素苷等生理指标有显著影响;21℃夜温处理转色时间最早,转色最快,成花率高,观赏品质最好,而且苞片花色素苷、可溶性糖含量以及PAL活性明显高于其余夜温处理,其次是18℃与24℃,而27℃夜温处理苞片基本不转色。因此,短日照期间的夜温以21℃左右为宜,这一研究结果对一品红国庆促成栽培生产具有重要的指导意义。更多还原

【Abstract】 In order to select the optimum night temperature on national day forcing culture of poinsettia( Euphorbia pulcherrima Willd.) under short-day,the effects of different night temperature( 18,21,24 and 27℃) on the flowering,anthocyanin,chlorophyll,soluble sugar content and phenylalanine ammonialyase( PAL) activity of ‘Red China’were investigated. The results showed that the night temperature significantly affected the course of flowering,visual quality,anthocyanin and other physiological indexes of bracts. Under 21℃ night temperature,the color change time was the earliest,turning rate was the fastest,flowering rate was the highest,and visual quality was the best. And anthocyanin,soluble sugar content and the PAL activity of bracts were higher than other night temperature treatments.The corresponding parameters became lower under 18℃ and 24℃. Moreover, the bracts color of 27 ℃ night temperature treatment did not significantly change. Therefore,21℃ was considered to be the optimum night temperature under short-day. The result of this study has important directive significance to National Pay forcing culture of poinsettia.更多还原