芦苇浸提液对虉草种子萌发及幼苗生长生理特性的影响

通过研究不同浓度芦苇浸提液(对照:0;处理1:150g/L;处理2:300g/L)对虉草萌发及幼苗生长影响,揭示了芦苇对虉草化感效应。结果表明:随着芦苇浸提液浓度升高,虉草发芽率、发芽指数、株高、根长以及叶绿素含量显著或极显著下降,各指标相应化感效应指数则显著或极显著上升;超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性和丙二醛(MDA)含量则随芦苇浸提液浓度升高呈不同的升降趋势。所有这些结果显示,随着浸提液浓度升高,芦苇对虉草的化感胁迫效应越来越明显。

Allelopathtic effects of Phragmites communis aqueous extract on seed germination and seedling growth of Phalaris arundinacea

Allelopathtic effects of Phragmites communis on Phalaris arundinacea was explored by studying the effects of aqueous extract of Phragmites communis with different concentrations (CK: 0;Treat 1:150 g/L;Treat 2:300 g/L) on seed germination and seedling growth of Phalaris arundinacea. The results showed that with the increase in the concentration of aqueous extract from Phragmites communis,seed germination rate,seed germination index,seedling height,seedling taproot length,and chlorophyll content in leaf showed significant or extremely significant reduction,while allelopathic effect indices based on the above indicators showed significant or extremely significant ascension. Activity of antioxidant enzymes of superoxide dismutase (SOD),peroxidase (POD),and catalase (CAT),and content of malondialdehyde (MDA) showed varying degrees of upward or downward trend with the increase in the concentration of aqueous extract. All these results indicated that allelopathic stress effect of Phragmites communis on Phalaris arundinacea was becoming more and more obvious with the increase in the concentration of extracts of Phragmites communis.