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Studies on fragrance, vase life and ethylene regulation of volatile production in rose flowers.

机译：研究月季花的香气，花瓶寿命和乙烯对挥发物产生的调节作用。

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摘要

This research determined the amounts of the main volatile compounds produced by fragrant and non-fragrant cut rose cultivars during vase life together with flower ethylene production, sensitivity respiration rate, weight loss and opening. No relationship was observed between the amount of volatile compounds produced and the longevity of the flower. Short vase life of fragrant rose cultivars was directly related with endogenous ethylene production, external ethylene sensitivity and quick fresh weight loss during vase life. Alternatively, fragrant roses with ethylene production below detection levels, insensitivity to external ethylene and slow fresh weight loss during vase life had acceptable vase lives. Respiration rate was not directly related with vase life of the flowers. Ethylene did not play a role on the regulation of volatile emission of the main biosynthetic pathways in rose flowers. Endogenous ethylene was very low in most of the cultivars and it was not autocatalytic. Ethylene had differential effect within flower petals since it regulated petal abscission and had no effect on volatile emission of fragrant rose flowers. Specific volatile compounds were produced in different amounts by each cut rose cultivar resulting in variable types of fragrance intensities on each flower. This research studied production of volatiles in relation to human detection and rose fragrance preferences. Human panelists detected different rose fragrance intensities that corresponded to the total amount of volatiles produced by each cultivar. Panelists gave the highest rank to a rose fragrance constituted mainly by 2-phenylethanol, 3,5 dimethoxytoluene, (-) transcaryophyllene, geranyl acetate and neryl acetate. The ability of human subjects to detect different fragrance intensities between flowers from the same cultivars at different stages of development depended on the type of volatile, its amount and the composition given by the specific volatile compounds emitted. The results of the volatile compounds emitted by rose flowers together with the ethylene production and sensitivity that lead to short vase life and the human ability to detect fragrance intensities and preferences can be used by rose breeders and flower producers to select long lasting fragrant roses.
机译：这项研究确定了花瓶寿命期间香型和非香型玫瑰切花品种产生的主要挥发性化合物的量，以及花乙烯的产生，敏感性呼吸速率，体重减轻和开放。所产生的挥发性化合物的量与花朵的寿命之间没有关系。香型玫瑰品种的花瓶寿命短与花瓶内寿命期间内源性乙烯的产生，外部乙烯敏感性和新鲜鲜重的减少直接相关。另外，在花瓶寿命期间，乙烯产量低于检测水平，对外部乙烯不敏感以及缓慢的新鲜体重下降的芳香玫瑰具有可接受的花瓶寿命。呼吸速率与花的花瓶寿命没有直接关系。乙烯在玫瑰花朵中主要生物合成途径的挥发性排放调节中没有作用。在大多数品种中，内源乙烯非常低，并且不是自催化的。乙烯在花瓣中具有不同的作用，因为它可以调节花瓣的脱落，并且对芬芳的月季花的挥发性排放没有影响。每种切花玫瑰品种都会以不同的量产生特定的挥发性化合物，从而在每朵花上产生不同类型的香气强度。这项研究研究了与人类检测和玫瑰香精偏好有关的挥发物产生。专家小组成员检测到不同的玫瑰香味强度，其对应于每个品种产生的挥发物的总量。专门小组成员对主要由2-苯基乙醇，3，5-二甲氧基甲苯，（-）反式石竹烯，乙酸香叶基乙酸酯和乙酸甘油酯组成的玫瑰香精给予最高评价。人类受试者在不同发育阶段检测相同品种花间不同香气强度的能力取决于挥发物的类型，挥发物的量以及所散发的特定挥发物化合物的组成。玫瑰育种者和花卉生产者可以使用玫瑰花散发出的挥发性化合物的结果以及乙烯的产生和敏感性，从而缩短花瓶寿命，以及人类检测香气强度和偏好的能力，从而可以选择玫瑰花持久香的品种。

著录项

  • 作者

    Borda Gutierrez, Ana Maria.;

  • 作者单位

    University of Florida.;

  • 授予单位 University of Florida.;
  • 学科 Agriculture Horticulture.;Biology Plant Physiology.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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