title: [Effect of temperature on physiologic indexes, bulb yielding and total alkaloids contents of Fritillaria cirrhosa].
abstract: OBJECTIVE
  To study the physiologic indexes, yield and the contents of alkaloids of Fritillaria cirrhosa D. Don under different temperature.
  
  
  METHODS
  The growth temperatures (15, 20, 25, 30 degrees C) of F. cirrhosa were controlled by using artificial climate, the growth was observed, the contents of chlorophyll a and b, soluble sugar, MAD, proline of the leaves of F. cirrhosa were tested, and the yield and the alkaloids content of the bulbs were analyzed.
  
  
  RESULTS
  The growth period of F. cirrhosa under 15, 20 degrees C were appropriately extended. The difference of the content of leaves chlorophyll b under four temperatures and the contents of total chlorophyll and chlorophyll a under 15, 20, 30 degrees C were not significant. The contents of soluble sugar, MAD and proline of leaves and the growth ratio, dry weight and content of alkaloids of bulb increased with the temperature decrease.
  
  
  CONCLUSIONS
  Higher temperature is not suitable for the growth of F. cirrhosa. Under the relatively lower temperature, the growth period of F. cirrhosa extended, the bulb can grow properly, and the content of alkaloid increased. F. cirrhosa can improve its cold tolerance by increasing the content of proline and soluble sugar, and it also can maintain the normal content of chlorophyll under the lower temperature.
authors.affiliation: College of Agronomy-Sichuan Agricultural Universty, Ya' an 625014, China.
authors.forename: Kai-qiang
authors.initials: KQ
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: You-liang
authors.initials: YL
authors.lastname: Zheng
authors.forename: Yong
authors.initials: Y
authors.lastname: Dai
authors.forename: Lan
authors.initials: L
authors.lastname: Mou
authors.forename: Kai
authors.initials: K
authors.lastname: Liao
mesh_terms: D000470:Alkaloids / Q000378:metabolism*; D031410:Fritillaria / Q000254:growth & development* / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant; D013696:Temperature
chemical_list: D000470:Alkaloids