MA Zi-lin.Preliminary Study on Water Absorbing Character and Drought Resistance of the Seed of Tibetan Medicine Przewalskia tangutica Maxim[J].Northern Horticulture,2013,37(22):164-166.
藏药马尿泡种子吸水特性及抗旱性的初步研究
- Title:
- Preliminary Study on Water Absorbing Character and Drought Resistance of the Seed of Tibetan Medicine Przewalskia tangutica Maxim
- 文章编号:
- 1001-0009(2013)22-0164-03
- Keywords:
- Przewalskia tangutica Maxim; seed; water absorbing character; drought resistance; critical water potential
- 分类号:
- R 282.2
- 文献标志码:
- A
- 摘要:
- 以马尿泡种子为试材，观察了其形态和不同时间种子吸水量，并利用不同浓度聚乙二醇测定马尿泡种子发芽的水分胁迫临近值，以研究马尿泡种子的吸水特性及抗旱性。结果表明：马尿泡种子表面黑褐色，有蜂窝状突起;形状近肾形、略扁型，长约3.0±0.4 mm，宽约2.5±0.3 mm，厚1.1±0.2 mm，千粒重为6.187±1.254 g；马尿泡吸水速度最快的时间在水分浸泡30 min内，0.5～6 h吸水减慢，6～10 h吸水加快，之后吸水速度减慢，到24 h，吸水基本停止；随着聚乙二醇浓度的增加，聚乙二醇胁迫对马尿泡种子的萌发均有一定的延缓作用,马尿泡种子发芽率迅速下降，聚乙二醇浓度增加到12%时，马尿泡种子发芽率为0.0%，马尿泡种子发芽时的水分胁迫的临界水势为-0.28 MPa。
- Abstract:
- Taking Przewalskia tangutica as material,the water stress value was studied by observing the seed morphology and determination of the weight of the absorbent and germination test with different concentrations of PEG.The results showed that seed of Przewalskia tangutica Maxim was surface dark brown,honeycomb-like protrusions,shape subreniform,slightly flat type,the seed length was about 3.0±0.4 mm,the seed width was about 2.5±0.3 mm,the seed thickness was about 1.1±0.2 mm,the seed grain weight was 6.187±1.254 g;the fastest water absorption rate was half in an hour,the rate slowed down in 0.5～6.0 hours,the rate became faster in 6～10 hours,the rate became slower after 10 hours,absorbent stopped at 24 hours;with the increase of PEG concentrations,germination rate decreased rapidly,when PEG concentrations was 12%,germination rate was 0.0%,the critical water potential of germination was -0.28 MPa on water stress condition.
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备注/Memo
作者简介：马子林（1976-），男，回族，农艺师，现主要从事农业技术推广等工作。E-mail:645077029@qq.com.
收稿日期：2013-06-24