NO对渗透胁迫下梭梭种子萌发及幼苗生长的影响

为了探讨梭梭种子萌发及幼苗生长对渗透胁迫的适应能力,采用聚乙二醇-6000（PEG-6000）和外源一氧化氮（NO）供体硝普钠（SNP）对梭梭种子进行处理,观测其种子萌发率和幼苗生长。结果表明：PEG-6000胁迫条件下,外源SNP处理能够显著提高梭梭种子的萌发率,增加幼苗根系和茎伸长生长,提高根系和茎叶的干质量;其中...

Effects of NO on seed germination and seedling growth of Haloxylon ammodendron under osmosis stress

To explore the adaptive capacity of seed germination and seedling growth of Haloxylon ammodendron under osmotic stress, seed germination percent and seedling growth of H. ammodendron were investigated using PEG and sodium nitroprusside (SNP). Results showed that seed germination percent of H. ammodendron was improved, as well as seedling root and stem growth, and dry weigh of seedlings increased with SNP treatment under PEG stress. Experimental data using SNP (300 μmol/L) was significant especially, and seed germination percent, seedling roots and stem elongate growth increased by 13%, 34% and 21% than control under -0.5 MPa conditions. Seed germination of H. ammodendron was completely inhibited under -1.5 MPa conditions, and seed germination rate was more than 40% using SNP treatment.