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为提高日益盐渍化耕地的作物抗盐性,从盐生植物根际土中分离得到4株含ACC脱氨酶的植物促生菌(PGPR),并在限菌条件下考察其对燕麦初生苗盐分胁迫下的促生效应.结果表明,随盐分的升高,促生作用增大.在10 g/L NaCl盐分胁迫下,4菌株对燕麦初生苗均表现出显著的促生效应,但以假单胞菌属S1最显著,其根长、根鲜重和根干重比未接菌对照分别增加137.2%、138.1%和96.2%.4株PGPR的ACC脱氨酶活性与植物生长参数(根长、根鲜重、根干重和下胚轴长)之间具有极显著的正相关性(相关系数>0.93).接种含ACC脱氨酶活性的PGPR可以作为一种环境友好、经济实用的盐渍化土壤改良措施.
In order to improve the salt-resistance of crops in the increasingly salinized land, four plant-derived growth promoting bacteria (PGPR) containing ACC deaminase were isolated from the rhizosphere soils of halophytes, The results showed that with the increase of salinity, the growth promoting effect increased.Under salt stress of 10 g / L NaCl, 4 strains all showed significant promoting effects on the primary seedlings of oats, however, Pseudomonas S1 was the most significant, and its root length, root fresh weight and root dry weight increased by 137.2%, 138.1% and 96.2%, respectively. The deaminase activities and the plant growth parameters (Root length, root fresh weight, root dry weight and hypocotyl length) had a significant positive correlation (correlation coefficient> 0.93) .Inoculation of PGPR with ACC deaminase activity could be used as an environmentally friendly and economical Practical salinization soil improvement measures.