作物学报Issue(6)：956-962,7.DOI:10.3724/SP.J.1006.2015.00956
外源水杨酸对Cu胁迫下水培烟草生长及营养元素吸收利用的影响
Effect of Salicylic Acid on Growth and Nutrient Uptake in Hydroponic Tobacco under Cu Stress
摘要
Abstract
A hydroponic experiment was conducted to study the effects from treatmeats including CK ( Cu2+ 0 mg L–1, SA 0μmol L–1 as control), T1 (Cu2+ 4 mg L–1, SA 0μmol L–1), T2 (Cu2+ 4 mg L–1, SA 100μmol L–1), T3 (Cu2+ 4 mg L–1, SA 300μmol L–1), T4 (Cu2+ 4 mg L–1, SA 500μmol L–1) on growth characteristics, elements absorption and accumulation in two tobacco cultivars,N. tabacum cv.W38 (Cu resistant genotype) andN. benthamiana (Cu sensitive genotype) under copper stress. The result showed that the growth of two tobacco cultivars under 4 mg L–1Cu stress for 15 days was inhibited to some extent, meanwhile, the content of Cu in their organs was increased while the absorptions of K, Ca, Mg, Fe, Zn, B, and Mn were inhibited. The addition of exoge-nous SA could alleviate the inhibition of plant height, root length and fresh weight, and reduce Cu content of tobacco, but increase the absorption of nutritional elements K, Ca, Mg, Fe, and Mn. Compared with treatment T1, contents of Cu in root, stem and leaf were increased by 25.05%, 39.78%, 22.91% in N. benthamiana, and by 23.27%, 37.30%, 28.88% in N. tabacum cv. W38, respec-tively. In conclusion, appropriate concentration of SA promotes the growth and elements absorption in tobacco under copper stress. In this experiment, 300μmol L–1 SA could significantly alleviate copper inhibition to tobacco.关键词
SA/Cu胁迫/烟草/微量元素Key words
Salicylic acid/Cu stress/Tobacco/Trace elements引用本文复制引用
徐根娣,葛淑芳,章艺,吴玉环,梅笑漫,刘鹏..外源水杨酸对Cu胁迫下水培烟草生长及营养元素吸收利用的影响[J].作物学报,2015,(6):956-962,7.基金项目
本研究由国家自然科学基金项目(30970188,30540056)和浙江省公益性技术应用研究计划项目(2011C22053)。 （30970188,30540056）
