Dynamic Changes in Fatty Acids in Macadamia Fruit During Growth and Development
Mingqun Cao,
Birong Zhang,
Minxian Duan,
Hanyao Zhang,
Suyun Yan,
Fan Yang,
Wenbin Shi,
Xiaomeng Fu,
Hongxia Yang,
Jinxue Li,
Xianyan Zhou
Affiliations
Mingqun Cao
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Birong Zhang
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Minxian Duan
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Hanyao Zhang
Yunnan Provincial Key Laboratory for Conservation and Utilization of In-Forest Resource, Southwest Forestry University, Kunming 650224, China
Suyun Yan
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Fan Yang
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Wenbin Shi
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Xiaomeng Fu
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Hongxia Yang
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Jinxue Li
School of Biotechnology and Engineering, West Yunnan University, Lincang 675800, China
Xianyan Zhou
National Key Laboratory of Tropical Crop Biological Breeding, Institute of Tropical and Subtropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan 678000, China
Fatty acids tend to undergo dynamic changes during the growth and development of fruits. In this study, we analyzed the variations in fruit morphology and kernel fatty acid fractions and contents at seven post-flowering stages in the fruit of ‘A4’ and ‘OC’, two main macadamia cultivars in Yunnan, China. The single fruit weight and longitudinal and transverse diameters showed a ‘fast–slow–stable’ growth trend, and the fruit shape index gradually decreased with fruit development. A total of 13 saturated fatty acids, 18 monounsaturated fatty acids, and 10 polyunsaturated fatty acids were detected in macadamia kernels at seven developmental stages. The total fatty acid content in ‘OC’ and ‘A4’ tended to first increase and then decrease. The fatty acid content accounted for 8.81% and 6.33% of the total fatty acids at 50 days after flowering (DAF), and peaked at 95 DAF and 125 DAF (the fatty acid content accounted for 25.61% and 20.69% of the total fatty acids), indicating that these two periods are critical for fatty acid accumulation in the two cultivars. In addition, oleic acid, palmitoleic acid, cis-Vaccenic acid, and hexadecenoic acid were determined as the main fatty acids. This study reveals the dynamic changes in fatty acid composition and content in ‘OC’ and ‘A4’ during fruit development, providing a scientific basis for determining the appropriate harvesting time for macadamia nuts.
