植物内生菌次生代谢产物对硝酸钙胁迫下番茄幼苗的影响

Effects of Secondary Metabolites of Endophytes on Agronomic Traits and Physiological and Biochemical Index of Tomato

[目的]了解不同浓度植物内生菌次生代谢产物对硝酸钙胁迫下番茄幼苗生化指标的影响。[方法]以L402为试验材料,在番茄幼苗3叶1心时期采用次生代谢产物处理后,进行硝酸钙胁迫,分别测定番茄幼苗株高、干物质及脯氨酸和可溶性蛋白含量。[结果]0μg/mLSRD(植物内生菌次生代谢产物混合物)处理效果最好,株高、根干重分别比对照高出10.7%、4.2%;叶片和根系的脯氨酸含量比CK低24.3%和2.2%。[结论]不同植物内生菌次生代谢产物均能缓解硝酸钙胁迫对番茄幼苗的伤害,10μg/mL SRD灌根处理效果最好。

[Objective] The aim was to explore effects of secondary metal）oliles of endophytes on the agronmnic traits and physiological and biochemical index of tomato under Ca（NO3）2 stress. [Methodl Using tomato cuJtivar IA02 as experimental material, the tomato seedlings were firstly treated by different eoneentralion of secondary metabolites. Then the Ca （NO3）2, stress was carried on one week later. The plant height, shoot and root dry weight, proline content anti soluble prolein contenl in leaves and root of seedlings were measured. [Resultl Among the Ihree concentrations, 10μg/mLSRD gol lhe l）esl effects. The planl heigh! and dry weight of rool were 10.7% （p〈0.05） and 4.2% （p〉0.05） higher than CK. The proline content in leaves and roots were decreased by 24.3% （p〈0.05） and 2.2% （p〉0.05） compared to CK. [Conclusionl The secondary metabolites of endophytes could alleviate the injure of plant caused by Ca （NO3）2 stress. Irrigating of 10 μg/mlL SRI） got the best effects.