Effect of Temperature on the Floral Scent Emission and Endogenous Volatile Profile of Petunia axillaris

The floral scent emission and endogenous level of its components in Petunia axillaris under different conditions (20, 25, 30, and 35 °C) were investigated under the hypothesis that floral scent emission would be regulated by both metabolic and vaporization processes. The total endogenous amount of scent components decreased as the temperature increased, the total emission showing a peak at 30 °C. This decrease in endogenous amount was compensated for by increased vaporization, resulting in an increase of floral scent emission from 20 °C to 30 °C. The ambient temperature differently and independently influenced the metabolism and vaporization of the scent compounds, and differences in vapor pressure among the scent compounds were reduced as the temperature increased. These characteristics suggest the operation of an unknown regulator to change the vaporization of floral scent.

[1]  J. Gershenzon,et al.  Diversity and distribution of floral scent , 2006, The Botanical Review.

[2]  E. Marchesi,et al.  Metabolic Regulation of Floral Scent in Petunia axillaris Lines: Biosynthetic Relationship between Dihydroconiferyl Acetate and iso-Eugenol , 2007, Bioscience, biotechnology, and biochemistry.

[3]  E. Marchesi,et al.  Floral Scent Diversity is Differently Expressed in Emitted and Endogenous Components in Petunia axillaris Lines , 2006, Annals of botany.

[4]  Wan Chang-quan,et al.  Activity changes of calmodulin and Ca2+-ATPase during low-temperature-induced anthocyanin accumulation in Alternanthera bettzickiana , 2005 .

[5]  M. Haring,et al.  ODORANT1 Regulates Fragrance Biosynthesis in Petunia Flowersw⃞ , 2005, The Plant Cell Online.

[6]  N. Watanabe,et al.  Emission Mechanism of Floral Scent in Petunia axillaris , 2005, Bioscience, biotechnology, and biochemistry.

[7]  Xinlu Chen,et al.  Understanding in Vivo Benzenoid Metabolism in Petunia Petal Tissue1 , 2004, Plant Physiology.

[8]  C. Olsen,et al.  Influence of climatic factors on emission of flower volatiles in situ , 2004, Planta.

[9]  R. Altenburger,et al.  Further observations on rhythmic emission of fragrance in flowers , 2004, Planta.

[10]  M. Oren-Shamir,et al.  Increased anthocyanin accumulation in aster flowers at elevated temperatures due to magnesium treatment. , 2002, Physiologia plantarum.

[11]  N. Watanabe,et al.  Aroma Evolution during Flower Opening in Rosa damascena Mill , 1999 .

[12]  J. Knudsen,et al.  Floral scents-a checklist of volatile compounds isolated by head-space techniques , 1993 .