不同浓度赤霉素浸种对樟子松种子萌发的影响

EFFECT OF DIFFERENT CONCENTRATION OF GIBBERELLIN ON THE SEED GERMINATION OF Pinus sylvestris var. mongolicaLitv.

赤霉素是植物生长发育过程中的一种重要调节物质,在植物生长发育中起着重要作用。本实验以贮藏时间不同的樟子松种子为材料,在光照恒温箱内对种子进行发芽实验,研究不同浓度的赤霉素对樟子松种子萌发的影响。结果表明,经过赤霉素浸种催芽后,种子发芽率、发芽势、丙二醛含量提高,种子浸泡液的电导率降低;赤霉素浓度不同对樟子松种子萌发的作用不同,浸种浓度为200mg/L时种子平均发芽率、发芽势最高。赤霉素处理樟子松种子作用大小与种子贮藏时间长短相关,其对1986采集的旧种子作用明显大于2010年采集的新种子。研究表明赤霉素对樟子松种子的膜有一定的修复作用,并且在研究浓度范围内随着赤霉素浓度增加其对细胞膜的修复能力增强。

Gibberellin is a kind of important regulating substance which plays an important role in the plant growth process and it was used to study the effect of the different concentration soaking on the seed germination of Pinus sylvestris var.mongolica Litv.in the programmable illuminated incubator in this experiment.The results indicated that both the germination and the germination potential of the seed increase,seed＇s activity of the MDA enhanced,while conductivity of the seed extracts decreased after soaking by gibberellin.The different concentrations soaking by Gibberellin is the different effect on the seed germination of Pinus sylvestris var.mongolica Litv and under 200mg/L gibberellin the greatest is the seed average germination rate,germination potential in all tested concentrations.The effect of Gibberellin soaking on the seed of Pinus sylvestris var.mongolica Litv is in connection with the storage duration.The effect on the old seed collect in 1986 is significantly greater than that on the new seed collect in 2010.The research shows that gibberellin could be the function about repairing the membrane which increases as the concentration of gibberellin increases in the test edconcentrations.