空心莲子草浸提液对海菜花种子萌发及幼苗生长的影响

The Effect of Alternanthera Philaxeroides Griseb Extract Liquid on Ottelia Acuminata Dandy Seed Germination and Seeding Growth

以外来入侵物种空心莲子草与国家珍稀植物海菜花为研究对象,采用培养皿滤纸法研究不同浓度空心莲子草浸提液对海菜花种子萌发及幼苗生长的影响。结果表明:海菜花种子发芽势、发芽率随浸提液浓度增高先升高后降低;当浸提液浓度为50%、30%时,种子发芽势与发芽率分别达到27.5%、82.5%;浸提液浓度为50%时对海菜花种子发芽势促进作用极显著(P<0.0001);浸提液浓度为30%时对海菜花种子发芽率促进作用极显著(P<0.0001)。浸提液浓度分别低于30%、10%时,海菜花幼苗的苗长与鲜重、根长均表现为促进作用。

The research object are the Alien Invasive Species Ahernanthera philoxeroides and rare plant Ottelia, Concentrations effect of Ahernanthera philoxeroides extracts of from seed germination and seedling growth of Otte- lia aeuminata were studied using Petri dish bioassays. The results show that seed germination potential and seed germination rate increases first and then decreases with the increasing concentrations of the aqueous extracts. The seed germination potential and seed germination rate reached 27.5% and 82.5% when the extract concentrations were 50% and 30%. In the condition of 50% and 30% extract concentration, the promoting effect of the seed germination potential and seed germination rate was significant respectively （ P 〈 0. 0001 ） ; leaching solution concentration is 50% of Ottelia acuminata seed germination promoting effect was significant （ P 〈 0. 0001 ） ; extraction liquid concentration is 30% on the seed germination rate and promote the role of Ottelia significantly （P 〈0.0001 ）. The shoot length and fresh weight and root long of seeding were promoting role when extract con- centrations were lower than 30% and 10%.