北京林业大学学报2016，Vol.38Issue(5)：114-119,6.DOI:10.13332/j.1000--1522.20150306
HgCl2胁迫对东方百合叶烧指数和水分利用效率的影响
Effects of HgCl2 stress on the upper leaf necroses and water use efficiency of oriental hybrid lilies
摘要
Abstract
Some of the oriental hybrid lily cultivars are prone to upper leaf necrosis ( ULN) , which has become a major threat to the quality of cut and pot lilies. The ULN of oriental lily is believed to relate with water metabolism. In order to explore the relationship between ULN of lilies and the aquaporin, we used three different concentrations of aquaporin inhibitor HgCl2 ( 50, 100 and 200 μmol/L ) to irrigate two lily cultivars which are different in sensitivity to ULN. The result showed that with the increasing concentrations of HgCl2 , the ULN indexes of the cultivar ‘Sorbonne ' were increased by 13. 56%, 36. 06% and 42. 19%, respectively, compared with the contrast; for the cultivar ‘Siberia', the ULN indexes were increased by 7. 20%, 12. 15% and 18. 00%, respectively. The height, stem diameter, leaf area, root length, activity of stem shooting roots, net photosynthetic rate and transpiration rate of‘Sorbonne' and ‘Siberia' were inhibited to varying degrees, especially for the root activity. The root activities of ‘Sorbonne' were reduced by 41. 9%, 54. 7% and 67. 5%, respectively, compared to the contrast after treated with three concentrations of HgCl2; for ‘Siberia' , the root activities were reduced by 4. 8%, 33. 5% and 38. 2%, respectively. The WUEs of ‘Sorbonne' were decreased by 14. 00%, 19. 23% and 46. 06% after HgCl2 treatment, while those of ‘Siberia ' were decreased by 8. 62%, 17. 60% and 28. 71%, respectively. The following conclusions could be drawn: with different levels of HgCl2 stress, the water transportation of ‘Sorbonne' and ‘Siberia' was inhibited, and the ULN indexes were increased. We initially speculate that the degree of ULN of lilies is related to the expression of plant aquaporins.关键词
HgCl2/水通道蛋白/东方百合/叶烧指数/水分利用效率Key words
HgCl2/aquaporin/oriental lilies/upper leaf necroses index/water use efficiency分类
农业科技引用本文复制引用
杨爽,袁晓娜,王中轩,祝璞,贾桂霞..HgCl2胁迫对东方百合叶烧指数和水分利用效率的影响[J].北京林业大学学报,2016,38(5):114-119,6.基金项目
林业公益性行业科研专项(201204609)。 （201204609）
