[Objective] This study aimed to investigate the influences of UV-C irradiation on seed germination and seedling growth of winter wheat. [Method] Winter wheat cul- tivar Liaoda 02 was selected as the experimental mater...[Objective] This study aimed to investigate the influences of UV-C irradiation on seed germination and seedling growth of winter wheat. [Method] Winter wheat cul- tivar Liaoda 02 was selected as the experimental material and irradiated with UV-C for 1 h,to compare the dynamic changes of seed germination rate under different treatment time and the changes of gibberellin （GA） content and a-amylase activity during the germination process after UV-C irradiation. Wheat seeds irradiated with UV-C for 1 h were sown, the emergence number, growth speed, fluorescence param- eter, reflectance spectrum, relative conductivity and other related physiological indica- tors of seedlings were determined. [Result] The results showed that the germination rate of dry and wet winter wheat seeds irradiated with UV-C for 1 h was improved, compared with the untreated seeds. After soaked for 6, 8, 10 and 12 h, dry seeds irradiated with UV-C for 1 h showed higher GA content and higher a-amylase activity than the control. In addition, UV-C-irradiated dry seeds also showed faster emergence speed and plant growth speed within the first six days after emergence and greater plant height than the control. The flavonoid content in leaves of the treatment group was also increased compared with the control, while the maximal photochemical effi- ciency （Fv/Fm）, photo-chemical reflectance index （PRI）, chlorophyll and carotenoid content were rarely influenced. In conclusion, UV-C irradiation could improve the ger- mination rate of dry seeds and wet seeds soaked for a certain time, especially for wet seeds soaked for 1 h. Furthermore, UV-C-irradiated seeds showed improved ger- mination speed and plant growth. [Conclusion] This study laid the foundation for ex- ploring the effect mechanism of ultraviolet rays on seed generation.展开更多
Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley （Hordium vulgate L.） （1-9-3, 150-2-3, ...Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley （Hordium vulgate L.） （1-9-3, 150-2-3, 1-1-200 and 150-1-5）, wheat （Triticum aestivum L.） and garden cress （Lipidium sativum L.）. This experiment was conducted in laboratory at room temperature. Oil extracted from crude oil contaminated soil was added to sand used in different concentrations （0%, 2%, 4%, 6%, 8% and 10%）. 10 seeds of each crop were sown in ptri-dishes with different treatments separately. For Each treatment four replicates were used in completely randomized design, germination percent was calculated, after one week, shoot and root length were measured. Data were statistically analyzed using MINTAB version 12. The results show that barley mutant line （150-2-3） was significantly different from other entries in germination percent, shoot and root length except mutant line 150-1-5 in germination percent. Results demonstrated that the mutant line 150-2-3 was promising to remediate crude oil contaminated soil.展开更多
基金Supported by National Natural Science Foundation of China (30771340, 30771156,31071412)~~
文摘[Objective] This study aimed to investigate the influences of UV-C irradiation on seed germination and seedling growth of winter wheat. [Method] Winter wheat cul- tivar Liaoda 02 was selected as the experimental material and irradiated with UV-C for 1 h,to compare the dynamic changes of seed germination rate under different treatment time and the changes of gibberellin （GA） content and a-amylase activity during the germination process after UV-C irradiation. Wheat seeds irradiated with UV-C for 1 h were sown, the emergence number, growth speed, fluorescence param- eter, reflectance spectrum, relative conductivity and other related physiological indica- tors of seedlings were determined. [Result] The results showed that the germination rate of dry and wet winter wheat seeds irradiated with UV-C for 1 h was improved, compared with the untreated seeds. After soaked for 6, 8, 10 and 12 h, dry seeds irradiated with UV-C for 1 h showed higher GA content and higher a-amylase activity than the control. In addition, UV-C-irradiated dry seeds also showed faster emergence speed and plant growth speed within the first six days after emergence and greater plant height than the control. The flavonoid content in leaves of the treatment group was also increased compared with the control, while the maximal photochemical effi- ciency （Fv/Fm）, photo-chemical reflectance index （PRI）, chlorophyll and carotenoid content were rarely influenced. In conclusion, UV-C irradiation could improve the ger- mination rate of dry seeds and wet seeds soaked for a certain time, especially for wet seeds soaked for 1 h. Furthermore, UV-C-irradiated seeds showed improved ger- mination speed and plant growth. [Conclusion] This study laid the foundation for ex- ploring the effect mechanism of ultraviolet rays on seed generation.
文摘Phytoremediation shows promise as an alternative low-cost to most remediation methods. This study evaluated the germination of six crops, including four mutant lines of barley （Hordium vulgate L.） （1-9-3, 150-2-3, 1-1-200 and 150-1-5）, wheat （Triticum aestivum L.） and garden cress （Lipidium sativum L.）. This experiment was conducted in laboratory at room temperature. Oil extracted from crude oil contaminated soil was added to sand used in different concentrations （0%, 2%, 4%, 6%, 8% and 10%）. 10 seeds of each crop were sown in ptri-dishes with different treatments separately. For Each treatment four replicates were used in completely randomized design, germination percent was calculated, after one week, shoot and root length were measured. Data were statistically analyzed using MINTAB version 12. The results show that barley mutant line （150-2-3） was significantly different from other entries in germination percent, shoot and root length except mutant line 150-1-5 in germination percent. Results demonstrated that the mutant line 150-2-3 was promising to remediate crude oil contaminated soil.
