Temperature and Different Organs Create Volatile Profile Differences of Edible Gynura [Gynura bicolor (Roxb. ex Willd.) DC]
Journal
HortScience
Journal Volume
56
Journal Issue
8
Pages
954-960
Date Issued
2021-08
Author(s)
Abstract
The volatile profile of the edible vegetable Gynura bicolor [Gynura bicolor (Roxb. ex Willd.) DC] was analyzed using gas chromatography-mass spectrometry (GC-MS). Isocaryophyllene (23.2%), alpha-pinene (16.8%), alpha-humulene (9.1%), beta-pinene (7.3%), and copaene (7.0%) were identified as the major compounds in the leaves. In the stems, alpha-pinene (27.1%), beta-pinene (13.0%), isocaryophyllene (7.8%), beta-myrceneb (7.8%), 1-undecene (5.7%), and copaene (5.3%) were the main components. G. bicolor grows best at 25 degrees C. When cultivated at different temperatures (20 to 35 degrees C in incements of 5 degrees C), the volatile profiles shifted. The proportion of isocaryophyllene was lower at 20 degrees C than at the other temperatures. The relative amounts of alpha-pinene and alpha-humulene were highest at 20 degrees C, whereas copaene was highest at 35 degrees C. Principal component analysis (PCA) was used to explore the correlation between volatile compounds identified from the vegetative tissues and temperature treatments. It reveals the same trend with the previous statements and the first principal component (PC1) and the second principal component (PC2) explains up to 90% of the variance. Experimental results revealed that both temperature and vegetative organ correlate with the volatile emission profile of G. bicolor.
Subjects
Asteraceae family
gas chromatography-mass spectrometry
solid-phase microextraction
vegetative parts
volatile compounds
Publisher
American Society for Horticultural Science
Type
journal article