生物安全学报（中英文）2025，Vol.34Issue(2)：124-129,6.DOI:10.3969/j.issn.2095-1787.20240069
环境因子对入侵植物南美鬼针草种子萌发的影响
Effects of environmental factors on seed germination of the invasive plant Bidens subalternans Candolle
摘要
Abstract
[Aim]This study aimed to explore the influence of common environmental factors on the seed germination characteristics of the newly discovered invasive plant Bidens subalternans Candolle in Inner Mongolia and to provide scientific basis for further research on its invasion mechanism.[Method]The germination percentage,energy and index were measured and analyzed using the paper dish method under different temperatures,pH values and salt stress conditions.[Result]The germination percentage of B.subalternans seeds increased initially and then decreased with rising temperature.The germination percentage in the range of 15-30℃ exceeded 62.17％,with the highest percentage attained at 25 ℃;however,it gradually decreased above 25 ℃.Similarly,the seed germination percentage increased initially and then decreased with increasing pH values.When the pH was between 4 and 11,the seed germination percentage was over 51.94％ and exceeded 86.39％ when the pH was between 6 and 8.The germination percentage was the highest at pH 7.The germination percentage of seeds decreased gradually with increasing salt concentration.The percentage could reach 77.92％-90.56％ when the salt concentration was below 100 mmol·L-1 but significantly decreased when the concentration exceeded 100 mmol·L-1(P＜0.05).The changes in the germination energy and index of B.subalternans seeds were consistent with germination percentage.[Conclusion]The optimum germination conditions were a temperature of 15-30 ℃,pH of 6-8,and salt concentration of 0-100 mmol·L-1.Among these,25℃ was the best temperature for germination,and pH 7 provided the optimal acid and alkali environment.In conclusion,B.subalternans seeds can germinate in three environmental conditions,temperature,pH,and salt concentration,it has a certain degree of adaptability to environmental factors,and it is necessary to strengthen the prevention and control of B.subalternans.关键词
入侵植物/南美鬼针草/种子萌发/环境因子Key words
invasive plants/Bidens subalternans/seed germination/environmental factors引用本文复制引用
吴迪,宋晓悦,张萨如拉,王苏日古嘎,勿日汉,贺俊英..环境因子对入侵植物南美鬼针草种子萌发的影响[J].生物安全学报（中英文）,2025,34(2):124-129,6.基金项目
内蒙古自然科学基金资助项目(2022LHMS03003) （2022LHMS03003）
