摘要
报道了核黄素促进植物生长的效应及分子反应。在实验室内对 7种粮食、蔬菜和经济作物使用核黄素后 ,植物生长量增加 2 3 8%～ 85 4 %。在田间试验中 ,烟草使用核黄素后 ,生长量提高 35 9%～ 10 8% ,烤烟叶产量提高 4 4 7%～110 3%。在拟南芥上 ,核黄素处理可以诱导PR 3b、PDF1 2、ETR1和EIN2基因的表达 ;PR 3b和PDF1 2是乙烯信号通路的分子标志 ,乙烯 /茉莉酸信号传导可以调控植物生长发育 ;ETR1和EIN2是乙烯信号通路上、下游的关键调控基因 ,其产物分别作为乙烯的受体和转录调控因子起作用。根据以上这些结果 ,核黄素启动了植物生长信号传导通路的分子反应 。
Riboflavin plays an important role in plant disease resistance signaling and possibly regulates plant growth signal transduction.Here we report that riboflavin enhances plant productivity by activating growth signaling pathway in plants.In the assays on 7 species of crops,plants treated with riboflavin were taller and their individual weights were higher than those treated with water.Riboflavin increased plant height and weight by 35 1% and 75 9% per plant in tomato,25 7% and 23 8% in pepper,20 3% and 43 5% in cucumber,9 4% and 31 4% in pak choi,27 3% and 70 8% in Chinese cabbage,19 9% and 85 4% in tobacco,and 19 9% and 80% in rice,respectively.Application of riboflavin to Arabidopsis thaliana induces expression of the PR 3b,PDF1 2,ETR1,and EIN2 genes.Whereas PR 3b and PDF1 2 are molecular markers of the ethylene signal transduction pathway,which regulates growth and development and many other processes in plants,ETR1 and EIN2 function as an ethylene receptor and a transcriptional regulator in the pathway.Based on the induction of the genes and the phenotypes,riboflavin activates growth signal transduction pathway in plants.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2002年第4期33-36,共4页
Journal of Nanjing Agricultural University
基金
国家重点基础研究发展规划 (973计划 )项目 (G2 0 0 0 0 162 0 1)
国家自然科学基金高技术探索项目 (3 0 0 80 0 1)
