摘要
以萌发15d的多年生黑麦草小苗为试验材料,采用全组合试验设计,研究了外施海藻糖(0、0.2%、0.6%)对不同NaCl浓度(0、0.5%、1.0%)胁迫下黑麦草生长和离子平衡的影响。结果表明:(1)适宜的海藻糖浓度(0.2%)显著(p<0.05)提高了高盐(1.0%NaCl)胁迫下黑麦草的分蘖数,缓解了高盐对其生长的抑制作用;(2)0.6%海藻糖处理显著(p<0.05)增加了0.5%和1.0%盐胁迫下的叶重比,但降低了根重比和根冠比。(3)高盐(1.0%NaCl)胁迫下,0.2%海藻糖处理的植株,K+含量明显高于其他处理,海藻糖促进了K+在根中的积累。外施0.2%海藻糖对相同盐浓度胁迫下各海藻糖处理中K+/Na+比率最高。
In this paper the seedlings of Lolium perenne were used as the experimental materials and the full combination experimental design was adopted. The effects of exogenous trehalose （0,0.2%,0.6%）on the growth and ion balance of Lolium perenne under NaC1 stress of different concentrations（0,0.5%, 1.0%） were studied. The following results were obtained. 1. The tiller number of Lolium perenne under high NaC1 stress （1.0%） was increased significantly （p 〈0.05） with an appropriate concentration of trehalose（0.2%）, which relieved the inhibiting effect of high NaC1 on the growth of the seedlings. 2. The leaf weight ratio of the seedlings under NaC1 stress of 0.5% and 1.0% was increased significanty （p〈0.05） with the treatment of 0.6% trehalose, but the root weight ratio and the root/shoot ratio were lowered with the treatment. 3. Under high NaC1 stress （1.0%）, the K＋ contents in the seedlings treated with 0.2% trehalose were significantly higher than those with other treatments. Trehalose promoted the accumulation of K＋ in the roots. Under NaC1 stress of the same concentration, the K＋/N＋ ratio was the highest in the roots of the seedlings with the exogenous application of 0.2% trehalose.
出处
《安徽林业科技》
2012年第4期9-12,共4页
Anhui Forestry Science and Technology
基金
"浙江省重点科技创新团队项目资助"(2010R50039)
