Intergenerational Transmission Of Physiological Plasticity Of Xanthium Strumarium And Xanthium Sibiricum

The problems caused by plant invasion have not only brought huge challenges to the ecological environment,but also brought huge economic losses to human production and life.In this study,the invasive species Xanthium strumarium and the native relative species X.sibiricum were used as experimental materials to study the differences in water and nutrient content between the parents(F0),the first generation(F1)and the second generation(F2)of the two species.The intergenerational changes of water physiology and photosynthesis physiology under different conditions,explore the relative change rate of physiological plasticity of invasive plants in the intergenerational environmental changes,analyze the transmission law of plasticity of alien invasive plants in the intergenerational environmental changes,and explain the intergenerational physiological plasticity The role of transmission in plant invasion.The main findings are as follows:Under the conditions of high nutrient and high water content,the water potential,transpiration rate,total chlorophyll content and net photosynthetic rate of Xanthium strumarium have no significant changes in the relative rate of change between generations,while the relative rate of change between generations of X.sibiricum has significant changes when the generations are the same.;Under the conditions of high nutrient and low moisture,the water potential,transpiration rate,specific leaf area and net photosynthetic rate of Xanthium strumarium have significant changes in intergenerational change rate,and the relative change rate of X.sibiricum between generations has a significant change under the same generation treatment..The conclusion is as follows:Under the conditions of high nutrient and high water content,Xanthium strumarium has lower plasticity changes than X.sibiricum in water potential,transpiration rate,total chlorophyll content and net photosynthetic rate,and the plasticity transfer between generations is higher than X.sibiricum,saving the cost of re-adaptation to the environment.Under high nutrient and low water conditions,when the generations are treated the same,compared to X.sibiricum,the water potential,transpiration rate,specific leaf area and net photosynthetic rate of Xanthium strumarium have higher plasticity changes,and there is no obvious transfer of plasticity between generations.In a high-resource environment,Xanthium strumarium plants adapt to the environment and find a physiological operation method suitable for the current environment,and pass it to the offspring in the same or similar environment,so that the offspring can operate in a similar physiological manner to maintain the offspring and the Survival in an invasion habitat.In a low-resource environment,Xanthium strumarium explores the environment for more generations,looking for a suitable physiological way to continue the population.