‘冀桑2号’对NaCl胁迫的生理响应

贾漫丽; 李娜; 李季生; 王军; 杨贵明

doi:10.3969/j.issn.1001-3776.2018.04.004

‘冀桑2号’对NaCl胁迫的生理响应

Physiological Responses of Grafted Morus alba ‘Jisang 2’ Seedlings to NaCl Stress

摘要

摘要: 2014 年4 月，在河北省承德市，将‘冀桑2 号’Morus alba‘Jisang 2’嫁接在‘冀桑3 号’M. alba‘Jisang 3’ 的砧木上。嫁接苗于次年4 月移栽于盆中并置于防雨棚下。2015 年6 月，分别用质量浓度0.0%（CK），0.2%， 0.3%，0.4%的NaCl 溶液处理试验苗木28 d，处理后每隔7 d 取样一次并检测各项生理指标。结果表明：随着NaCl 胁迫时间的增加，‘冀桑2 号’叶片中的相对电导率和丙二醛（MDA）含量不断上升；超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）的活性先上升后下降，游离脯氨酸和可溶性糖含量先上升后下降；可溶性蛋白呈下降趋势。

Abstract: Scions of Morus alba ‘Jisang 2’ were grafted in stocks of M. alba ‘Jisang 3’ in April of 2014 in Chengde, Hebei province. Grafted seedlings were transplanted in pot under rain-proof shed in the April of the next year. In June of 2015, seedlings were treated with 0 (control)，0.2%， 0.3% and 0.4%NaCl solutions of NaCl for 28 days, and physiological parameters were detected each 7 days after treatment. The results showed that relative conductivity and malondialdehyde (MDA) content in leaves of M. alba ‘Jisang 2’ increased with stress duration of NaCl, while the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) increased first and then decreased, as well as the content of free proline and soluble sugar, and soluble protein decreased.

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