title: [Effect of water stress on physiological and growth charaters of Prunella vulgaris at the vegetative stage].
abstract: OBJECTIVE
  To study the effect of water stress on physiological and the growth characters of Prunella vulgaris at the vegetative stage.
  
  
  METHODS
  The plants were treated timely and quantitatively by weighting method, and the relevant index were measured under different water stress conditions.
  
  
  RESULTS
  With the long time of water stress, the plants of SY2 and SY3 showed the quickest growth rate and the best of growth vigor. The protective enzyme and osmoregulation substance presented the trend of increase firstly and then decrease. Under the same time of water stress, with the increase of extent in treatment, the protective enzyme and osmoregulation substance presented the trend of increase firstly and then decrease, and SY2 and SY3 were the lowest.
  
  
  CONCLUSIONS
  The protective enzyme and osmoregulation substance of P. vulgaris have a whole effect. The suitable water range of growth in P. vulgaris is 65%-80%.
authors.affiliation: Insititute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China. gqs@njau.edu
authors.forename: Qiaosheng
authors.initials: Q
authors.lastname: Guo
authors.forename: Lijun
authors.initials: L
authors.lastname: Zhou
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Zhang
authors.forename: Weiyan
authors.initials: W
authors.lastname: Xian
authors.forename: Biqun
authors.initials: B
authors.lastname: Han
mesh_terms: D031347:Prunella / Q000254:growth & development* / Q000502:physiology*; D013312:Stress, Physiological; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water