ZUO Jin-cheng,LI Xiu-ling,ZHANG Peng,et al.Effect of IAA and KT on Seed Germination and Seedling Growth of Vallisneria spiralis[J].Northern Horticulture,2014,38(23):53-56.
吲哚乙酸和激动素对苦草种子萌发和幼苗生长的影响
- Title:
- Effect of IAA and KT on Seed Germination and Seedling Growth of Vallisneria spiralis
- 文章编号:
- 1001-0009（2014）23-0053-04
- Keywords:
- eutrophication; submerged macrophytes; Vallisneria spiralis; IAA; KT
- 分类号:
- X 17；S 555+.9
- 文献标志码:
- A
- 摘要:
- 为提高富营养化水体中以种子恢复苦草的效率，研究了0（CK）、50、100、150、200 mg/L的吲哚乙酸（IAA）和激动素（KT）处理24 h和48 h后，苦草种子的萌发与幼苗的生长状况。结果表明：适当的浓度和浸种时间处理能显著促进种子的萌发、提高幼苗的株高和干重，但各处理对幼苗根冠比的影响不明显。种子的萌发对IAA和KT呈现较明显的浓度敏感性和处理时间敏感性，150 mg/L的IAA浸种24 h和100 mg/L的KT浸种48 h能明显促进苦草种子的萌发，而200 mg/L的IAA处理48 h，150、200 mg/L的KT处理24 h或48 h均有明显的抑制作用。处理时间相同时，各浓度的IAA对苦草株高的促进作用显著地大于KT（P<0.05）。150 mg/L的IAA处理24 h和100 mg/L的IAA处理48 h对株高的促进作用最显著（P<0.05）。100 mg/L的IAA处理24 h和100 mg/L的KT处理24 h对干重的促进作用最显著（P<0.05）。综合各指标，150 mg/L的IAA处理24 h效果最好。
- Abstract:
- In order to accelerate restoration ofVallisneria spiralis in eutrophic water bodies by broadcast sowing，the germination rates of V.spiralis seeds and growth of the seedlings after the seeds were treated with IAA and KT were examined.The concentrations were 0，50，100，150 and 200 mg/L and the soaking time was 24 hours and 48 hours.The results showed that proper combinations of concentration and soaking time could significantly accelerate germination of the seeds，increase the height and dry weight of the seedlings.However，all the treatments had no significant effect on root/shoot ratio.Seed germination was the most apparently accelerated by IAA concentration of 150 mg/L for 24 hours and KT concentration of 100 mg/L for 48 hours，but which was significantly inhibited by IAA concentration of 200 mg/L for 48 hours and KT concentration of 200 mg/L for 24 or 48 hours.This indicated that germination of the seeds was susceptive to the concentration and the soaking time.IAA produced more promotion effect on seedling height than KT，and the strongest promotion effect on shoot height was observed in IAA concentrations of 150 mg/L for 24 hours and 100 mg/L for 48 hours.The IAA concentration of 100 mg/L for 24 hours and KT concentration of 100 mg/L for 24 hours were the most beneficial to accumulation of dry matters for seedlings.Based on overall consideration of all the indexes，soaking seeds in IAA concentration of 150 mg/L for 24 hours would produce the most satisfying effect in application.
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备注/Memo
第一作者简介：左进城（1978-），男，博士，讲师，现主要从事水生生态学等研究工作。E-mail：zuo2008@hotmail.com.