Table S1. Mean relative amount (%) of chemical compounds on floral scent of three forms of cultivated Plumeria rubra L

Chemical compositions of floral scent emitted by three forms of cultivated Plumeria rubra L. are given in Table 1. In total, 68 different volatile compositions were identified from three forms of cultivated Plumeria rubra L. although only 14 chemical contents are statistical significantly, including fatty acid derivatives (33), benzenoids (15), and terpenoids (15). In red form of cultivated Plumeria rubra L., 24 different scent compounds mainly belonging to fatty acid were identified (56.75%), while only 13 compounds of them were also found both in white and yellow forms of Plumeria rubra L.. Benzodiazepines were the most dominant class of compounds in white and yellow forms of cultivated Plumeria rubra L.and contributed 48.38% and 42.30% of the total blend, respectively. Only two compounds in red form and another two different compounds both in white and yellow forms had large relative amounts over 10%, while the majority of the compounds were present at levels lower than 10% (Table 1).

表1列出了3种栽培型红鸡蛋花（Plumeria rubra L.）释放的花香化学成分。经检测，3种栽培红鸡蛋花中共鉴定出68种挥发性成分（volatile compositions），其中仅14种化学成分具有统计学显著性，涵盖脂肪酸衍生物（fatty acid derivatives，33种）、苯类化合物（benzenoids，15种）与萜类化合物（terpenoids，15种）。在红色栽培型红鸡蛋花中，共鉴定出24种不同的花香成分，主要归属于脂肪酸类，占总挥发成分的56.75%；其中仅有13种成分同时存在于白色与黄色栽培型红鸡蛋花中。白色与黄色栽培型红鸡蛋花中，苯二氮䓬类（Benzodiazepines）为优势化合物类别，分别占总挥发成分的48.38%与42.30%。红色栽培型红鸡蛋花中仅有2种成分的相对含量超过10%；白色与黄色栽培型红鸡蛋花中则各有2种不同成分的相对含量超过10%；绝大多数成分的相对含量均低于10%（见表1）。