海洋科学2023，Vol.47Issue(12)：40-54,15.DOI:10.11759/hykx20230404001
越冬前后海马齿脂肪酸和挥发性有机物组成和变化特征
Composition and changes in fatty acids and volatile organic compounds in Sesuvium portulacastrum during overwintering
摘要
Abstract
Sesuvium portulacastrum is a tropical and subtropical salt plant.It is a traditional wild vegetable that has been employed in the ecological restoration of coastal zones.However,low-temperature stress is a primary concern for favorable planting in northern areas for ecological restoration,and the mechanism remains unclear.Fatty acids(FAs)play pivotal roles in resistance to low temperatures,and volatile organic compounds(VOCs)are vital me-tabolites of FAs.In this study,the composition,differences,and changes in FAs and VOCs in different parts of S.portulacastrum before and after overwintering were characterized using plant samples from northern-planted eco-logical restoration floating beds.The results demonstrated that 14 FAs were detected in the flowers,leaves,stems,and roots of the plant.Roots contained the highest number of FA species.Flowers and leaves contained a higher proportion of polyunsaturated fatty acids(PUFA,averaging 56.46％and 60.23％,respectively)than stems and roots(averaging 41.56％and 44.45％,respectively).A total of 86 VOCs were detected in the stems and leaves,where mushroom alcohol was dominant species.The species number of FAs and VOCs reduced significantly after over-wintering,and the proportion of PUFA increased significantly in freeze-damaged plants.In terms of plant lipotropic index,plants that tolerated overwintering temperatures had enhanced lipotropic quality.Overwintering caused sig-nificant changes in two classes of compounds,among which the responses of C18 fatty acid metabolism may be critical,and C18:3(n-3)and mushroom alcohol presented as the two most pivotal metabolites that might be closely associated with resistance to low-temperature stress.This study provides a reference for the wide application of S.portulacastrum in constructing sustainable ecological restoration systems.关键词
海马齿/北移越冬/挥发性有机物/脂肪酸/脂质营养Key words
Sesuvium portulacastrum/northward transplant/volatile organic compounds/fatty acids/lipid nutrition分类
农业科技引用本文复制引用
毕正浩,杨芳,潘渊博,杨玲,林忠州,罗冬莲,周成旭..越冬前后海马齿脂肪酸和挥发性有机物组成和变化特征[J].海洋科学,2023,47(12):40-54,15.基金项目
福建省公益类科研院所基本科研专项(2020R1013004、2020R1013007) （2020R1013004、2020R1013007）
福建省海洋服务与渔业高质量发展专项资金项目(FJHY-YYKJ-2022-1-5)[Basic Research in Public Research Institutes in Fujian,Nos.2020R1013004,2020R1013007 （FJHY-YYKJ-2022-1-5）
Marine Services and Fisheries Quality Development Special Fund in Fujian,No.FJHY-YYKJ-2022-1-5] （）
