title: [Physiological and ecological effects of potassium on expansion of crocus corm].
abstract: The corm size of Crocus sativus, a well-known medicine, is a key limiting factor for its stigma harvest. A water cultural experiment with four different potassium (K) concentrations showed that the K content, chlorophyll content, relative ATP content and net photosynthetic rate in C. sativus leaves increased with improving K concentration, which enhanced the function of leaves to be metabolic source. On the other hand, the K absorbing ability and the contents of soluble sugars, vitamin C (Vc) and protein in new-born corms were increased with improving K concentration, which also strengthened the function of new-born corms to be metabolic sink. This study also showed that K could promote the new-born corm growth rate of C. sativus through strengthening the function of "source" and "sink".
authors.affiliation: School of Life Science, Key Laboratory of Eco-Environment of Three Gorges Reservoir Region of Ministry of Education, Southwest China Normal University, Chongqing 400715, China. liuyun19970205@sina.com
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Yun
authors.initials: Y
authors.lastname: Long
authors.forename: Liquan
authors.initials: L
authors.lastname: Zhu
authors.forename: Guoxing
authors.initials: G
authors.lastname: Cao
authors.forename: Zhangcheng
authors.initials: Z
authors.lastname: Zhong
mesh_terms: D000255:Adenosine Triphosphate / Q000032:analysis; D001205:Ascorbic Acid / Q000032:analysis; D002241:Carbohydrates / Q000032:analysis; D002734:Chlorophyll / Q000032:analysis; D027622:Crocus / Q000187:drug effects* / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004463:Ecology; D010788:Photosynthesis / Q000187:drug effects / Q000502:physiology; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D011188:Potassium / Q000032:analysis / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D002241:Carbohydrates; D002734:Chlorophyll; D000255:Adenosine Triphosphate; D001205:Ascorbic Acid; D011188:Potassium