PJB-2018-1522
Effects of nitrogen deficiency on physiology and growth of Fraxinus mandshurica
Yuzhu Zhou, Yongping He, Jiayao Sun, Jiawei Zhang and Yaguang Zhan
Abstract
This study was to investigate expression changes in biochemical molecules and physiology of Fraxinus mandshurica seedlings under nitrogen deficiency stress. The biochemical and physiological parameters together with gene expression levels undernitrogen deficiency stress were investigated. Differences in nitrogen metabolism key enzymes, ROS-scavenging genes, circadian rhythm genes, and endogenous hormones between nitrogen deficiency treatment and adequate nitrogen treatment were compared. Resistance to stress of the two groups was determined. The results showed that under the nitrogen deficiency condition, biomass and relative growth rate markedly decreased, and Fraxinus mandshurica had greater biochemical and physiological changes in nitrogen metabolism key enzymes and endogenous hormones. Additionally, expression of genes involved in biological clock and scavenging of reactive oxygen species (ROS) in nitrogen deficiency treatment were greatly changed while compared with that of total nitrogen treatment. In order to resist stress and maintain basic life activities, Fraxinus mandshurica increased its metabolic control, regulated oxidative stress and antioxidant systems, delayed aging, and inhibited their growth viachanging expression of circadian rhythm genes, reactive oxygen species scavenging genes, nitrogen metabolism, and endogenous hormones.
To Cite this article:
Download
