|本期目录/Table of Contents|

[1]江静兰,郑聪,丹冬淳,等.褪黑素和硝态氮配施对镉胁迫下烟草渗透调节及氮代谢的影响[J].江苏农业科学,2024,52(23):100-107.
 Jiang Jinglan,et al.Effects of combined application of melatonin and nitrate nitrogen on osmotic regulation and nitrogen metabolism of tobacco under cadmium stress[J].Jiangsu Agricultural Sciences,2024,52(23):100-107.
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褪黑素和硝态氮配施对镉胁迫下烟草渗透调节及氮代谢的影响(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第52卷
期数:
2024年第23期
页码:
100-107
栏目:
遗传育种与耕作栽培
出版日期:
2024-12-05

文章信息/Info

Title:
Effects of combined application of melatonin and nitrate nitrogen on osmotic regulation and nitrogen metabolism of tobacco under cadmium stress
作者:
江静兰1郑聪2丹冬淳1吴芳1贾宏昉1韩丹1胡源博3张蔷1邵惠芳1
1.河南农业大学烟草学院,河南郑州 450046; 2.福建省南平市烟草公司浦城分公司,福建南平 353000; 3.河南农业大学资源与环境学院,河南郑州 450046
Author(s):
Jiang Jinglanet al
关键词:
烟草硝态氮褪黑素镉胁迫氮代谢
Keywords:
-
分类号:
S572.01;S572.06
DOI:
-
文献标志码:
A
摘要:
为探究褪黑素和硝态氮配施对镉胁迫下烟草早期生长、渗透调节及氮代谢的影响,采用水培试验,在镉胁迫(20 μmol/L)下设置3个N水平,即10、5、0.1 mmol/L硝态氮,并对K326烟草品种喷施 100 μmol/L 褪黑素。结果表明,镉胁迫下褪黑素的施用提高了烟苗生物量,与Cd处理相比,高氮水平下外施褪黑素地上部和根系生物量分别增加了70.45%、275.00%,低氮水平下分别增加了65.22%、200.00%,其中地上部生物量随硝态氮浓度的降低而降低,分别为0.75、0.58、0.38 g。镉胁迫下烟苗叶绿素合成受到抑制,褪黑素和硝态氮的配施可有效促进叶绿素合成。与Cd处理相比,高氮处理下外施褪黑素进一步激活了脯氨酸、可溶性糖、可溶性蛋白的渗透调节系统,分别提高了1484%、10.41%、6.70%。此外,褪黑素可显著降低烟叶硝酸盐的积累,显著增加总氮和氮素积累量,促进氮代谢,高氮处理可提高植物对硝态氮的吸收,促进总氮和叶片氮素的积累。与Cd处理相比,褪黑素的喷施可提高氮代谢酶活性,高氮水平下外施褪黑素NR、NiR、GS、GOGAT活性分别显著提高了20.61%、16.47%、29.60%、28.88%,低氮水平下外施褪黑素NR、GS、GOGAT分别提高了11.46%、15.32%、22.79%。褪黑素和硝态氮的配施上调了氮代谢相关基因的表达,与N5处理相比,高氮水平下外施褪黑素上调了氮代谢相关基因NtNIA1和NtGDH1的相对表达,低氮水平外施褪黑素下调了NtNIA1、NtGOGAT1、NtGDH1的相对表达。综上,在胁迫条件下,短期高氮处理可有效提高烟苗早生快发,褪黑素也能加速烟草幼苗的生长,并进一步提高烟草幼苗的氮代谢能力。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2023-12-02
基金项目:河南省科技攻关项目(编号:212102110066)。
作者简介:江静兰(1996—),女,广西来宾人,硕士研究生,主要从事烟草生理生态研究。E-mail:JJL7375@126.com。
通信作者:邵惠芳,博士,教授,主要从事烟草加工工程与工艺、烟草质量评价研究。E-mail:shf.email@163.com。
更新日期/Last Update: 2024-12-05