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以小麦种子烟农19为试验材料,采用培养皿纸上发芽法,以纯水为对照,研究不同浓度烟酰胺溶液对小麦种子萌发及幼苗生长的影响.结果表明:烟酰胺溶液浓度为25 mg/L时,处理效果最佳.小麦种子发芽势、发芽率显著提高,分别增加了25.27%、15.58%;小麦幼苗的株高、根长,幼苗的鲜重均显著增加,其中株高增加了36.16%,根长增加了131.47%,幼苗的鲜重增加了38.89%,a-淀粉酶和叶绿素也分别增加了98.40%、87.69%,为研究烟酰胺作为小麦种子包衣剂成分提供了较好的试验基础. 相似文献
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以白菜、玉米和瘤芥菜为研究对象,探讨了Cr6+对植物种子萌发和生长的影响。结果表明,Cr6+对不同植物种子萌发和生长影响不同,不同浓度Cr6+对同一植物种子萌发和生长影响也不同。Cr6+严重抑制白菜种子萌发和生长;Cr6+浓度分别小于250 mg.L-1和200 mg.L-1时能促进瘤芥菜的种子萌发和生长,Cr6+浓度分别大于250 mg.L-1和200 mg.L-1时则抑制其种子萌发和生长;Cr6+浓度小于400 mg.L-1时对玉米种子萌发有促进作用,Cr6+抑制玉米生长。 相似文献
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以白菜、玉米和瘤芥菜为研究对象,探讨了Cr6+对植物种子萌发和生长的影响.结果表明,Cr6+对不同植物种子萌发和生长影响不同,不同浓度Cr6+对同一植物种子萌发和生长影响也不同.Cr6+严重抑制白菜种子萌发和生长;Cr6+浓度分别小于250 mg·L-1和200 mg·L-1时能促进瘤芥菜的种子萌发和生长,Cr6+浓度分别大于250 mg·L-1和200 mg·L-1时则抑制其种子萌发和生长;Cr6+浓度小于400 mg·L-1时对玉米种子萌发有促进作用,Cr6+抑制玉米生长. 相似文献
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采用元素分析、傅立叶变换红外光谱(FT-IR)和固体13C核磁共振等方法,对四种不同原料制备的类腐植酸与矿物源腐植酸在组分、元素组成和分子结构方面进行了研究,通过种子萌发实验对类腐植酸的生理活性进行了测定。结果表明,以草本植物(麦草、竹子)为原料制备的类腐植酸中,黄腐酸的含量明显高于木本植物(松木、杨木)制备的样品。类腐植酸与矿物源腐植酸的分子结构相似,具有腐植酸的特征官能团。与矿物源腐植酸相比,类腐植酸结构更复杂,其中芳香族结构、木质素衍生物及多糖等结构含量更多,含氧官能团含量较低,其中草本植物源制备的类腐植酸比木本植物制备的样品的芳香化程度更高,分子量更小。小麦种子萌发研究结果显示,类腐植酸浓度为20~40 mg/L时对种子萌发起到明显的促进作用,但浓度过高反而会抑制其生长。 相似文献
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研究了酰胺类新化合物不同浸种浓度、浸种时间以及浸种温度对小麦种子发芽的影响。结果表明:这几种新化合物在浸种时间为7~10 h,质量浓度为125 mg/L,温度为25℃时表现出较高的发芽率。 相似文献
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Phytotoxic properties of vulpia (V. myuros) residue extracts on wheat (Triticum aestivum L. cv. Vulcan) were examined in the laboratory. Vulpia residues contained water-soluble materials that were toxic to germination and to coleoptile and root growth of wheat. There were strong correlations between extract concentration and toxicity, between extraction times and toxicity, and between extract pH and phytotoxicity. The phytotoxicity was residue rate dependent. There was no significant correlation between the phytotoxicity of residue extracts and the electrical conductivity of aqueous extracts. Milled residues were more toxic than chopped residues. The toxicity of vulpia residues increased as their decomposition proceeded, reaching a peak phytotoxicity after decomposition for 40 days and remaining potent for up to 60 days, gradually declining thereafter. Radicle elongation of wheat was the most sensitive indicator, germination was the least sensitive, and coleoptile growth was intermediate. The phytoxic effects of residue extracts on seed germination had two aspects: germination delay and inhibition. The relative magnitude of each aspect depended upon the potency of the extracts. With a strong phytotoxic potential, inhibition of germination was dominant over seed germination, whereas with a weak toxic level, delay was dominant over seed germination. 相似文献
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为研究盐胁迫条件下黄腐酸(FA)对大豆种子萌发及抗氧化酶活性的影响,以微生物降解褐煤产生的FA为实验材料,研究了其在大豆萌发过程中对根部过氧化氢酶(CAT)和过氧化物酶(POD)活性及丙二醛(MDA)含量的影响。结果表明,盐胁迫条件下,低浓度(100、200 mg/L)的FA会提高大豆种子萌发过程中根部CAT及POD的活性,而高浓度(1000 mg/L)的FA作用恰恰相反。低浓度(100 mg/L)的FA降低大豆种子萌发过程中根部MDA的含量。综上得出,100 mg/L的FA可以提高大豆种子萌发过程中对盐胁迫的适应力。 相似文献
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黄腐酸、水杨酸浸种对冬小麦种子活力的影响 总被引:8,自引:0,他引:8
使用黄腐酸(FA)和水杨酸(SA)浸种,可以显著提高种子活力,增加抗逆性能,本试验研究了黄腐酸和水杨酸浸种对冬小麦种子抗盐以及水分胁迫的影响,结果表明,使用FA与SA进行浸种处理,对种子细胞膜有明显的保护作用,减少盐和水分胁迫对种子的伤害,增加冬小麦种子NACI溶液培养和PEG(聚乙二醇)溶液培养条件下的发芽率,促进根增长,提高在盐和水分胁迫条件下的种子活力。黄腐酸和水杨酸两种物质结合使用可显著提高处理效果,具有明显的正效应。 相似文献
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Hai -Hang Li Masafumi Inoue Hiroyuki Nishimura Junya Mizutani Eiji Tsuzuki 《Journal of chemical ecology》1993,19(8):1775-1787
Phenolic compounds have been identified as the most common allelochemicals produced by higher plants. Inhibitions of cinnamic acid, its related phenolic derivatives, and abscisic acid (ABA) on seedling growth and seed germination of lettuce were studied.trans-Cinnamic acid, ando-,m-, andp-coumaric acids inhibited the growth of etiolated seedlings of lettuce at concentrations higher than 10–4 M and seed germination above 10–3 M. Coumarin inhibited seedling growth and seed germination at 10–5 M or above. Chlorogenic acid inhibited seedling growth above 10–4 M, but did not inhibit seed germination at 10–5–5×10–3 M. Low concentrations (below 10–3 M) of caffeic and ferulic acids promoted the elongation of hypocotyls, but higher concentrations (over 10–3 M) inhibited seedling growth and seed germination. These phenolic compounds and abscisic acid had additive inhibitory effects both on seedling growth and seed germination. The inhibition on lettuce was reversed by caffeic and ferulic acids at concentrations lower than 10–3 M except for the inhibition of germination by coumarin. These results suggest that in naturetrans-cinnamic acid,o-, m-, p-coumaric acids, coumarin, and chlorogenic acid inhibit plant growth regardless of their concentration. However, caffeic and ferulic acids can either promote or inhibit plant growth according to their concentration. 相似文献
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种子包衣用成膜剂SYFMA001的应用性能 总被引:2,自引:0,他引:2
[目的]研究了自主开发的种子包衣成膜剂SYFMA001的应用性能,为其用于高性能种衣剂的开发而提供相关的技术参数.[方法]测试了成膜剂SYFMA001的物理化学性能指标,并用其制备了20%福美双·克百威和0.25%戊唑醇悬浮种衣剂,研究了其在玉米、大豆、小麦种子上的包衣效果,并测试了包衣后种子的发芽势和发芽率.[结果]成膜剂SYFMA001的外观良好,性能稳定,包衣效果良好,成膜时间小于5 min,包衣脱落率小于2%,均匀度在90%以上.包衣后种子的发芽率试验结果显示:SYPFMA001对玉米、大豆、小麦种子发芽率没有影响,与对照相当.[结论]SYFMA001是一种性能优良的成膜剂,适宜用于开发性能优良的种衣剂. 相似文献