Chin J Plant Ecol ›› 2017, Vol. 41 ›› Issue (4): 471-479.DOI: 10.17521/cjpe.2016.0292

Special Issue: 入侵生态学专辑

• Orginal Article • Previous Articles     Next Articles

Effects of enhanced UV-B radiation and nitrogen deposition on the growth of invasive plant Triadica sebifera

Bang-Liang DENG, Qian LIU, Xi-Shuai LIU, Li-Ya ZHENG, Liang-Bo JIANG, Xiao-Min GUO, Yuan-Qiu LIU, Ling ZHANG*()   

  1. Jiangxi Key Laboratory of Silviculture/Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2016-09-20 Accepted:2017-01-03 Online:2017-04-10 Published:2017-05-19
  • Contact: Ling ZHANG

Abstract:

Aims Exotic plant invasions are important components of global change, threatening both the stability and function of invaded ecosystems. Shifts in competitive ability of invasive plants versus their native congeners have been documented. Enhanced UV-B radiation and nitrogen (N) deposition might interact with soil biota communities impacting the invasion process of exotic plant species. To understand the potential effects by UV-B and N with soil biota on plant growth would enhance our understanding of the mechanisms in plant invasions in the context of global change.
Methods We conducted a full-factorial pot experiment in the native range (China) of Triadica sebifera invading US to investigate how UV-B radiation, N and soil biota together determined their seedling growth.
Important findings The results showed that UV-B radiation, N and soil sterilization together impacted the growth of T. sebifera seedlings. UV-B radiation induced changes in biomass allocation with larger leaf biomass observed in response to UV-B radiation. In addition, N increased aboveground biomass and decreased root biomass simultaneously. Soil biota imposed positive effects on growth of T. sebifera, and the addition of N amplified these positive effects. The negative effects by UV-B radiation on growth of T. sebifera showed no response to N addition. Plant height, leaf biomass and total biomass of the invasive T. sebifera populations out- performed those of the native ones. In addition, invasive T. sebifera populations weakened the dependence of root/shoot ratio and root biomass on local soil microorganisms than native populations, but enhanced that of leaf area ratio.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201704009

Key words: abiotic stress, soil microorganism, resource availability, plant invasion