Welcome to Bulletin of Botanical Research! Today is Share:

Bulletin of Botanical Research ›› 2023, Vol. 43 ›› Issue (5): 720-728.doi: 10.7525/j.issn.1673-5102.2023.05.009

• Physiology and Ecology • Previous Articles     Next Articles

Effects of Drought Conditions on Interspecific Interactions and Growth of Bidens pilosa and Buddleja lindleyana

Jiaxing CHEN, Shu WANG(), Linli CHEN, Xiali HOU, Qingzhu YANG, Renya YIN   

  1. Forest College,Guizhou University,Guiyang 550025
  • Received:2023-06-12 Online:2023-09-20 Published:2023-09-05
  • Contact: Shu WANG E-mail:lnbx625@163.com
  • About author:CHEN Jiaxing(1997—),male,major in plant ecology.
  • Supported by:
    National Natural Science Foundation of China(32171511)


In order to investigate the effects of drought on the interspecific relationship and growth of the invasive plant Bidens pilosa and the native species Buddleja lindleyana, two methods were designed: interspecific group(one plant of each of two species were planted in a pot) and baffled group(a baffle separated the two plants in the interspecific group), and two water treatments were applied, including the drought group (30%-35% saturated moisture content) and control group(90%-100% saturated moisture content), and plant morphological characteristics, biomass, relative growth rate, and relative neighbor effect index of each plant feature were measured respectively. The results showed that: (1)under both drought conditions, interspecific interactions promoted the root, stem, leaf, and total biomass of Bidens pilosa, whereas water availability altered the interspecific interactions of Buddleja lindleyana, with competition under the drought treatment and facilitation under the control treatment; (2)under drought conditions, interspecific interactions increased the relative growth rate and root-to-shoot ratio of Bidens pilosa root, stem, and leaf biomass, and decreased the specific leaf area and root-to-shoot ratio of Buddleja lindleyanaP<0.05). (3)Interspecific interactions significantly promoted the growth of root length, root surface area, and root tip number in both species(P<0.05). The results indicate that interspecific interactions promote the growth performance of Bidens pilosa under drought conditions, provid it with a competitive advantage in arid habitats, potentially as part of its invasion strategy.

Key words: interspecific interaction, drought, relative growth rate, invasive plant, Bidens pilosa

CLC Number: