生态学杂志2012，Vol.31Issue(10)：2561-2567,7.
矮壮素对苦草矮化特征及生理指标的影响
Effects of cycocel on the dwarfing characteristics and physiological indices of Vallisneria natans
摘要
Abstract
More and more attention has being paid to the pollution in waters induced by the fast growth of submerged macrophyte. In this paper, a laboratory simulation experiment was conducted to study the effects of different concentrations (0, 0. 01, 0. 02, 0. 10, 0.20, 0.50, 0.75, 1.00, and 1.25 g· L-1 ) of cycocel on the dwarfing characteristics and physiological indices of Vallisneria natans. After treated with different concentration cycocel for 30 days, the plant height of V. natans had significant differences (P<0.05). The higher the cycocel concentration, the higher the dwarfing effect was. Cycocel made V. natans leaves wider and its roots shorter. At 0. 02-0. 20 g · L-1 of cycocel, the root/shoot ratio increased; at 0. 01-0. 50 g · L-1 of cycocel, the plant number increased. At 0. 10-0. 50 g · L-1 of cycocel, the wet weight of V. natans increased by 61% -123% , which meant that the plants could absorb more nutrients such as nitrogen and phosphorus from waters and sediments, and improve water quality. At 0. 02 g · L~' of cycocel, the dwarfing effect was much better, and the plants occupied smaller space. Moreover, the plants at 0. 02 g · L-1 of cycocel had longer root length and higher root/shoot ratio, chlorophyll content, SOD and POD activities, accordingly, had an increased stress-resistance and a delayed aging. In sum, 0.02 g · L-1 of cycocel was more suitable for V. natans dwarfing.关键词
苦草/矮化/株高/叶绿素/酶活性Key words
Vallisneria natans/ dwarfing/ plant height/ chlorophyll/ enzyme activity.分类
资源环境引用本文复制引用
刘晓培,张饮江,李岩,董悦,文晓峰,易冕,何培民,李娟英..矮壮素对苦草矮化特征及生理指标的影响[J].生态学杂志,2012,31(10):2561-2567,7.基金项目
国家水专项(08ZX07101-005)、国家科委世博专项(05ba908b23)、上海市科委重大项目(08dx1900408)和上海市重点学科建设项目(Y1110,S30701)资助. （08ZX07101-005）
