摘要
利用不同浓度的海水处理早熟禾种子,测定不同浓度海水胁迫下早熟禾种子的发芽率、发芽势、发芽指数、简化活力指数和胚根胚芽生长量,研究重要草坪植物早熟禾种子对盐碱土壤的耐受力。结果表明:随着海水浓度的增加,所有指标均总体呈现下降趋势,且发芽率、发芽指数在1%海水浓度时即与对照具有显著差异,说明海水对早熟禾种子的萌发具有一定的抑制作用;但其耐盐半致死浓度仍达到30%,发芽势在5%、简化活力指数在1%、胚根胚芽的生长量在5%海水浓度时与对照并无显著差异,说明早熟禾种子对盐碱胁迫具有潜在的耐受性;较低浓度海水对胚芽的影响甚于胚根,但高浓度情况下,盐碱胁迫对胚根生长的影响较大。
P. pratensis seeds were treated with seawater of different concentrations, germination rate, the germination potential,germination index,vigor index, simplified radicle bud growth amount of P. pratensis seed under seawater stress were determined,and the important turfgrass P. pratensis seeds on saline alkali soil tolerance were studied. The results showed that with the concentration increased, all the indicators had an overall declining tendency,and the germination rate, germination index in 1 ~ seawater concentrations to control had significant differences,the description of seawater on P. pratensis seed germination had certain inhibition;but its salt half lethal concentration reached 30% ,germination vigor in 5 %, simplified vigor index in 1%, radicle bud growth in 5% seawater concentration and comrol had no significam difference,which indicated that the P. pratensis seeds on saline-alkali stress potentially tolerated; lower concentration of seawater on germ affects more than radicle ,but in higher concentrations, saline-alkali stress on radicle growth influences greatly.
出处
《北方园艺》
CAS
北大核心
2012年第15期83-86,共4页
Northern Horticulture
基金
2011年江苏省高等学校大学生实践创新训练计划资助项目(885)
关键词
早熟禾
种子萌发
海水胁迫
P. pratensis
seed germination
seawater stress
