摘要
以生菜品种"大速生"为试材,采用基质栽培研究方法,研究了叶面喷施不同浓度的Fe2+对生菜幼苗形态和生理指标的影响。结果表明:喷施低于60mg/L的Fe2+处理对生菜的株高无明显影响,但浓度为60mg/L Fe2+时,就会抑制植株长高;Fe2+浓度低于45mg/L时,生菜具有较多的叶片数,浓度为60mg/L则起抑制作用;Fe2+处理对生菜的叶绿素a含量和叶绿素总含量的影响不明显,但是15mg/L Fe2+处理对生菜叶绿素b含量有促进作用,在此处理下的叶绿素b含量显著高于其它各处理,约为对照的164%;60mg/L Fe2+处理显著提高了生菜叶片的可溶性蛋白质含量;虽然叶面喷施Fe2+对叶片可溶性糖含量没有显著的影响,但显著降低了叶片脯氨酸含量和过氧化物酶的活性,且浓度越高,抑制作用越明显。
Taking ‘Dasusheng'lettuce as test materials,the effects of spraying Fe2+ on lettuce seedlings were studied using matrix cultivation.The results showed that it had no effect on plant height when the concentration was lower than60mg/L,and it inhibited the growth as the concentration was up to 60 mg/L.Lettuce had more leaves when the concentration was lower than 45mg/L,and it showed restriction effect under 60mg/L.Fe2+ had no significant influences on contents of chlorophyll a and total chlorophyll,but it increased the chlorophyll b content when the Fe2+ concentration was 15mg/L.The chlorophyll b content under the treatment of 15mg/L Fe2+was about 164% of the control.The soluble protein content was the highest when praying with 60mg/L Fe2+.Fe2+ did not influence the content of soluble sugar,however it decreased the content of proline(Pro)and the activity of peroxidase(POD),the higher concentration,the lower Pro content and POD activity,respectively.
出处
《北方园艺》
CAS
北大核心
2014年第24期31-34,共4页
Northern Horticulture