Allelopathic effects of invasive Spartina alterniflora root exudates in soil on the offspring (seeds) of Scirpus mariqueter

作者：Liang, X.; Zheng, H.; He, C. Q.^*; Xu, Q. Y.; Zhan, Y. W.; Lei, Y. R.; Du, W.; Yang, J. N.

来源：Allelopathy Journal, 2012, 29(2): 251-261.

• Allelopathic effect
• invasive plant
• Scirpus mariqueter
• soil
• Spartina alterniflora

Spartina alterniflora Loisel is an invasive species in Jiuduansha Islands and threatens the local biodiversity and the survival of native species Scirpus mariqueter. In this study, the resistant and tolerant characteristics of native species S. mariqueter against invasive species S. alterniflora and the inheritance of these characteristics were examined. Our results showed that due to the invasion of S. alterniflora, the germination of S. mariqueter seeds and the growth of seedlings in the invaded soil were significantly inhibited. The ultimate germination of S. mariqueter decreased from 91.67% (non-invaded) to 5.83% (invaded). Our data indicated that soil of S. alterniflora and S. mariqueter both contained many compounds. But heneicosanoic acid, hexadecane, octadecane, sulfuric acid, diethyl ester and so on were only found in S. alterniflora soil and they might have allelopathic effect on the S. mariqueter. S. mariqueter would begin to evolve resistant or tolerant characteristics against allelochemicals when invaded by S. alterniflora. The resistant or tolerant characteristics were utilized by S. mariqueter genetically developed in S. mariqueter offspring. However, the growth of S. mariqueter was still affected seriously by S. alterniflora.

• 出版日期2012-4
• 单位上海大学