Light and Temperature Effects on the Color and Scent of Osmanthus fragrans ‘Houban Yingui’

Xuan Cai; Jie Yang; Xiangling Zeng; Jing-Jing Zou

doi:10.7235/HORT.20220054

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2022 Vol.40, Issue 6 Preview Page Next Page

Research Article

Light and Temperature Effects on the Color and Scent of Osmanthus fragrans ‘Houban Yingui’

31 December 2022. pp. 595-604

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Abstract

External environmental factors affect the appearance of plants, specifically their color and aroma. To investigate the effects of environmental factors on the ornamental quality of Osmanthus fragrans, which has bright colors and a strong floral fragrance, the contents of characteristic flower color and aroma compounds under different light and temperature treatments were investigated in O. fragrans ‘Houban Yingui’. The content of the characteristic color compound β-carotene decreased after continuous light treatment and increased after continuous dark treatment, resulting in a paler color under light conditions and a deeper color under dark conditions. The volatiles of the flowers significantly decreased under both continuous light and continuous dark treatments, suggesting that the rhythm of alternating day and night may be more conducive to the synthesis and release of volatiles. In a low-temperature treatment, the contents of β-carotene decreased, resulting in a brighter color, while a high temperature may affect the flower color appearance by oxidation of phenolic compounds in addition to pigments. A high temperature accelerated flower senescence and promoted the release of cis-3-hexenyl butanoate and hexyl butanoate. A low temperature increased the release of trans-β-ionone, α-ionone, and many monoterpenes and corresponding oxides, which are aroma-active compounds of O. fragrans, resulting in a longer-lasting floral fragrance. The results here demonstrate that controlling the environmental conditions of the temperature and light can regulate the color and scent of O. fragrans.

Keywords

aroma-active compounds

characteristic color compounds

environmental condition

flowers

sweet osmanthus

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Information

Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
Publisher(Ko) :원예과학기술지
Journal Title :Horticultural Science and Technology
Journal Title(Ko) :원예과학기술지
Volume : 40
No :6
Pages :595-604
Received Date : 2022-06-22
Revised Date : 2022-09-16
Accepted Date : 2022-09-30
DOI :https://doi.org/10.7235/HORT.20220054

Horticultural Science and Technology ISSN:1226-8763(Print) 2465-8588(Online) 원예과학기술지

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