Effects of Exogenous Spermidine on Root Metabolism of Cucumber Seedlings under Salt Stress by GC-MS

Agronomy

Lingjuan Han¹  Bing Liu¹  Bin Li¹  Leiping Hou¹  Xujian Peng² 

[1] Collaborative Innovation Center for Improving Quality and Increase profits of Protected Vegetables in Shanxi, College of Horticulture, Shanxi Agricultural University, Taigu 030801, China;Department of public order, Nanjing Forest Police College, Nanjing 210023, China;

关键词: spermidine;    salt stress;    roots;    metabolomics;    cucumber;   

DOI  :  10.3390/agronomy10040459

来源: DOAJ

【 摘 要 】

To investigate the effects of exogenous spermidine (Spd) on metabolism changes under salt stress in cucumber roots, a gas chromatography-mass spectrometry (GC-MS) was performed. The results showed that most of the 142 metabolites responded to salt stress or exogenous Spd treatment. Salt stress reduced carbon consumption, resulted in the transformation of glycolysis and the tricarboxylic acid (TCA) cycle to the pentose phosphate pathway (PPP), and meanwhile increased salicylic acid (SA) and ethylene synthesis, and, thus, inhibited the growth of seedlings. However, exogenous Spd further improved the utilization of carbon, the energy-saving pattern of amino acid accumulation, and the control of hydroxyl radicals. In conclusion, Spd could promote energy metabolism and inhibit SA and ethylene synthesis in favor of root growth that contributes to higher salt tolerance. This study provides insight that may facilitate a better understanding of the salt resistance by Spd in cucumber seedlings.

【 授权许可】

Unknown