期刊
PLANTS-BASEL
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/plants11050694
关键词
yellow-peel pitaya; sugar and organic acid metabolism; transcriptome analyses; gene expression
资金
- Key Science and Technology Planning Project of Guangzhou [201904020015]
- Science and Technology Program of Guangzhou [202002020060]
- Zhanjiang [2019A01003]
This study examined the sugar and organic acid metabolism in pulp of yellow-peel pitayas and identified genes involved in these processes. The results highlighted the changes in sugar and organic acid contents during fruit development stages and revealed the key genes related to sugar and organic acid metabolism in pitayas. This study provides new insights for regulating the quality of pitayas.
Sugar and organic acids are important factors determining pitaya fruit quality. However, changes in sugars and acids, and expressions of metabolism-associated genes during fruit maturation of yellow-peel pitayas are not well-documented. In this study, metabolic and expression analyses in pulps of different fruit developmental stages of 'Wucihuanglong' ('WCHL', Hylocereus undatus) and 'Youcihuanglong' pitaya ('YCHL', Hylocereus megalanthus) were used to explore the sugar and organic acid metabolic process. Total phenols and flavonoids were mainly accumulated at S1 in pitaya pulps. Ascorbic acid contents of 'WCHL' pitaya were higher than that of 'YCHL' pitaya during fruit maturation. Starch was mainly accumulated at early fruit development stages while soluble sugars were rich in late stages. Sucrose, fructose, and glucose were the main sugar components of 'YCHL' pitaya while glucose was dominant in 'WCHL' pitaya. Malic and citric acids were the main organic acids in 'WCHL' and 'YCHL' pitayas, respectively. Based on the transcriptome analyses, 118 genes involved in pitaya sugar and organic acid metabolism were obtained. Results from the correlation analyses between the expression profiling of candidate genes and the contents of sugar and organic acid showed that 51 genes had a significant correlation relationship and probably perform key role in pitaya sugar and organic acid metabolism processes. The finding of the present study provides new information for quality regulation of pitayas.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据