摘要
The fruit of Chinese jujube(Ziziphus jujuba)possesses extremely high concentrations of ascorbic acid(As A).The accumulation of As A,the expression patterns of the nine genes related to As A metabolism as well as the activities of five enzymes involved in As A synthesis,oxidation and recycling were investigated during fruit development in Z.jujuba Mill.‘Jinsixiaozao'.The results showed that the high level of As A accumulation in jujube fruit is due to a contribution from both As A biosynthesis and As A recycling.It is suggested that L-galactono-1,4-lactone dehydrogenase,ascorbate peroxidase and monodehydro-ascorbate reductase are the crucial genes/enzymes of jujube As A synthesis,oxidization and recycling,respectively.These results provide useful new insights into the regulatory mechanisms of As A accumulation in Chinese jujube.
The fruit of Chinese jujube(Ziziphus jujuba)possesses extremely high concentrations of ascorbic acid(As A).The accumulation of As A,the expression patterns of the nine genes related to As A metabolism as well as the activities of five enzymes involved in As A synthesis,oxidation and recycling were investigated during fruit development in Z.jujuba Mill.‘Jinsixiaozao'.The results showed that the high level of As A accumulation in jujube fruit is due to a contribution from both As A biosynthesis and As A recycling.It is suggested that L-galactono-1,4-lactone dehydrogenase,ascorbate peroxidase and monodehydro-ascorbate reductase are the crucial genes/enzymes of jujube As A synthesis,oxidization and recycling,respectively.These results provide useful new insights into the regulatory mechanisms of As A accumulation in Chinese jujube.
基金
supported by grants from the National Science and Technology Support Plan of China(2013BAD14B03)
Agricultural University of Hebei Foundation for Leaders of Disciplines in Science Technology
Top-notch Talent Support Project of Hebei Province
Youth Foundation of Hebei Educational Committee(QN2015232)
