【摘要】 采用温室水培的方法,研究了不同氯素供应水平对烤烟叶片硝酸还原酶(NR)、转化酶(INV)、乙醇酸氧化酶(GO)活性和叶绿素含量的影响。结果表明:NR和GO活性均随Cl-浓度提高而降低;适量Cl-(0 5～4 0mmol/L)使INV活性处于较高水平,缺Cl-(ck)和高Cl-(>4 0mmol/L)降低了整个生育期的INV活性;适量Cl-有利于烟草营养阶段叶绿素的合成,而高Cl-叶绿素含量在后期仍处于较高水平,不利于叶片的落黄成熟。更多还原

【Abstract】 Hydroponics of the full growth season in green houses was used to study the effect of chloride on activities of Nitrate reductase,Invertase,Glycolate oxidase and chlorophyll content of tobacco leaves.Six kinds of chloride concentration have been made in the experiment 0,0.5,2.0,4.0,8.0,32.0 mmol/L.The results showed that both the activities of Nitrate reductase and Glycolate oxidase decreased with the increase of chlorine concentration. The invertase activity was on a higher level under the condition of proper chloride (0.5～4.0 mmol/L ) and decreased in the full increment stage under the condition of deficient chloride(ck) and excessive chloride(>4.0 mmol/L).Chlorophyll content was still on a high level at later growth stage under the condition of excessive chloride,which is unfavorable to normal maturity of tobacco leaves.更多还原