Effect of soil moisture on the gas exchange of Changium smyrnioides and Anthriscus sylvestris

Y. Ge, J. Chang, W. C. Li, H. Y. Sheng, C. L. Yue, Yuk Sing Gilbert Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


The effect of soil moisture on gas exchange and growth of an endangered species, Changium smyrnioides, was compared with a non-endangered species, Anthriscus sylvestris. The two species belong to the same family Umbellaceae. With the decrease of soil moisture, the net photosynthetic rate (PN) and transpiration rate (E) decreased, while water use efficiency (WUE) increased, PNand WUE of C. smyrnioides were lower than those of A. sylvestris, whereas E was higher than that of A. sylvestris. The biomass, leaf mass ratio (LMR) and leaf area ratio (LAR) of C. smyrnioides were lower than those of A. sylvestris. Under drought, biomass. LMR and LAR of C. smyrnioides decreased more steeply than those of A. sylvestris, whereas specific root length (SRL) of C. smyrnioides was higher, compared to that of A. sylvestris. The present study indicated that C. smyrnioides accumulated less biomass, and directed more biomass to roots than A. sylvestris.
Original languageEnglish
Pages (from-to)605-608
Number of pages4
JournalBiologia Plantarum
Issue number4
Publication statusPublished - 24 Sep 2004


  • growth analysis
  • photosynthesis
  • physiological traits
  • structural traits
  • transpiration
  • water use of efficiency

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

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