Solar UV-B radiation modifies the proportion of volatile organic compounds in flowers of field-grown grapevine (Vitis vinifera L.) cv. Malbec

GIL M.; BOTTINI R.; PONTIN M.; BERLI F.; SALOMON M.V.; PICCOLI P.

PLANT GROWTH REGULATION

SPRINGER

Lugar: Berlin; Año: 2014 vol. 74 p. 193 - 197

0167-6903

Ultraviolet-B solar radiation (UV-B) is anenvironmental signal with biological effects in different plant tissues. Recentinvestigations reported dramatic  changes of terpenes with a protectiverole in plant tissues submitted to biotic and abiotic stresses. This studyexamined the volatile organic compounds (VOCs) profile in flowers of Vitisvinifera L. cv. Malbec under filtered UV-B (or not). Gas chromatography electronimpact mass spectrometry analysis of flowers resulted in the identificationof12 VOCs, including eight sesquiterpenes, two aldehydes, and two ketones,being the oxygenated sesquiterpene farnesol the most abundant. The total amountof VOCs in flowers did not change irrespective UV-B had been filtered or not,suggesting those compounds have a protective role that is constitutive of thereproductive tissues. However UV-B increases the proportion of valencene, b-farnesene,a-panasinsene and hepatriacontanedione which would require further investigation.