| 左进城，孙守梅，王雅宁。解卫海。周瑞莲。胡德昌.赤霉素和吲哚乙酸对轮叶黑藻冬芽萌发和幼苗生长的作用[J].广东农业科学,2014,41(19):170-173 |
|
查看全文
HTML
赤霉素和吲哚乙酸对轮叶黑藻冬芽萌发和幼苗生长的作用 |
| Effects of GA and IAA on winter buds sprouting and seedling growth of Hydrilla verticillata |
| |
| DOI： |
| 中文关键词: 富营养化 沉水植物 轮叶黑藻 冬芽 赤霉素 吲哚乙酸 |
| 英文关键词: eutrophication submerged macrophytes Hydrilla verticillata winter bud GA IAA |
| 基金项目:国家“十二五”水专项（2012ZX07101007-005）；山东省自然科学基金（ZR2013CQ026）；鲁东大学博士基金 |
|
| 摘要点击次数: 1782 |
| 全文下载次数: 870 |
| 中文摘要: |
| 为缩短轮叶黑藻冬芽的萌发时间，提高富营养化水体中轮叶黑藻冬芽的成苗率。研究了0、50、100、150、200 mg/L 的赤霉素（GA）和吲哚乙酸（IAA）处理12 h和24 h后，轮叶黑藻冬芽的萌发状况与幼苗的生长状况。结果表明，适当浓度的GA 和IAA 能显著促进冬芽的萌发、提高幼苗的株高和干重、增加幼苗根的数目，但各处理对幼苗分枝数的影响不明显；冬芽的萌发对GA 和IAA 呈现较明显的浓度敏感性和处理时间敏感性院100、150 mg/L 的IAA处理12 h、50 mg/L 的IAA 处理24 h、150 mg/L 的GA 处理12 h和50 mg/L 的GA 处理24 h，均能明显促进冬芽的萌发，而200 mg/L 的IAA 和GA 处理24 h对冬芽的萌发有明显的抑制作用；50、100 mg/L 的IAA 对幼苗株高的促进作用显著地大于GA，100、50 mg/L 的IAA 对幼苗干重的促进作用显著地大于GA，而150 mg/L 的GA 处理12 h和100mg/L 的GA 处理24 h比IAA 更有利于幼苗的生根。综合各指标，150mg/L 的IAA或GA 处理12h效果较好。 |
| 英文摘要: |
| In order to shorten sprouting time of Hydrilla verticillata winter buds and increase the rate of forming plantlets in eutrophic water bodies, experiments were carried out to examine the sprouting rates of H. verticillata winter buds and growth of the seedlings after the winter buds were treated with GA and IAA. The concentrations were 0, 50, 100,150 and 200 mg/L and the soaking time were 12 h and 24 h. Results showed that proper combinations of concentration and soaking time of GA and IAA could significantly accelerate the sprouting of winter buds, increase the height, dry weight and root number of seedlings. However, all the treatments had no significant effects on shoot number. Sprouting of winter buds was apparently accelerated after soaked in IAA concentrations of 100 mg/L and 150 mg/L for 12 h and 50 mg/L for 24 h,as well as in GA concentrations of 150 mg/L for 12 h and 50 mg/L for 24 h (P<0.05), but was significantly inhibited after soaked in IAA or GA concentration of 200 mg/L for 24 h (P<0.05). This indicated that sprouting of winter buds was susceptive to the concentration and soaking time of GA and IAA. IAA concentrations of 50 mg/L and 100 mg/L had stronger promoting effects on height of seedlings than GA (P<0.05), and IAA concentrations of 100 mg/L and 150 mg/L were more beneficial to dry matter accumulation (P<0.05), while rhizogenesis of the seedlings may be more promoted in GA concentrations of 150 mg/L for 12 h and 100 mg/L for 24 h than IAA (P<0.05). The results indicated that, soaking winter buds in IAA and GA concentration of 150 mg/L for 12 h would produce satisfying effects in application. |
|
查看/发表评论 下载PDF阅读器 |
