南方红豆杉叶浸提液对小麦种子萌发与幼苗生长的影响

采用滤纸培养皿法研究了南方红豆杉叶浸提液对小麦种子萌发与幼苗生长的影响。研究结果发现,红豆杉叶浸提液对小麦种子的萌发和幼苗生长存在不同程度的抑制作用。低浓度的南方红豆杉浸提液促进小麦种子的萌发,高浓度浸提液抑制小麦种子的萌发。当浸提液浓度为6g/mL时,小麦种子的萌发率达到最高。南方红豆杉叶浸提液对小麦幼苗根系生长产生显著抑制作用。随着浸提液浓度的升高,小麦须根的长度逐渐下降,但不定根的数目逐渐增加。当浸提液的浓度为10g/mL时,根长抑制率达到42.48%。方差分析结果表明,南方红豆杉叶浸提液对小麦的根生长产生显著的抑制作用。对小麦幼苗的茎生长、根的生物量和茎的生物量均表现为低浓度的浸提液促进茎的生长和生物量的增加,高浓度浸提液则抑制茎的生长和生物量增加。研究结果表明,南方红豆杉浸提液表现低浓度时促进种子的萌发、须根数目的增加、茎的生物及生物量的增加,高浓度时则产生一定的抑制作用,而对根长的生长表现为显著的抑制作用。

Effects of Tasux chinensis var.mairei Extracts on Wheat Seed’s Germination and Seedlings Growth

In this study,culture dish methods with filter paper were used to study the effects of T.chinensis var.mairei extracts on wheat seed’s germination and seedling growth.The results showed that T.chinensis var.mairei extracts had significant effects on wheat seed’s germination.T.chinensis var.mairei extracts of lower concentration could promote seed’s germination,while higher concentration extracts could inhibit seed’s germination.Wheat seed germination rate was highest when the concentration of the extract reached to 6 g/mL.T.chinensis var.mairei leaf extract significantly inhibited the growth of wheat seedling roots.While the extract concentration increased,the length of wheat fibrous roots gradually decreased,but the number of adventitious roots increased.When the extract concentration reached to 10 g/mL,the inhibition rate of root length was 42.48%.The ANOVA showed that there were a significant inhibition on the growth of wheat root for T.chinensis var.mairei leaf extracts.The stem growth,root and stem biomass of wheat seedlings were promoted in the low concentration extracts,but inhibited in high concentrations extracts of T.chinensis var.mairei.The results showed that T.chinensis var.mairei extracts could promote seed germination,increase the number of fibrous roots,biomass of wheat in low concentration,but inhibited in the high concentrations.Root length growth was significantly inhibited.