摘要
为了探究烯效唑浸种处理对盐碱胁迫下藜麦幼苗生长的缓解效应,以陇藜1号为试验材料,采用盆栽法研究不同浓度烯效唑(0、15、30、45和60 mg/L)浸种处理对不同程度盐碱胁迫(CK 0 g/kg、轻度盐碱3 g/kg、中度盐碱5 g/kg、重度盐碱7 g/kg)下藜麦苗期(播种后28 d)农艺性状及生理参数的影响。结果表明,藜麦幼苗渗透物质含量、抗氧化酶活性及根系活力在轻度盐碱胁迫(3 g/kg)下均有所提高,以应对盐碱环境,缓解氧化损伤;根冠比和壮苗指数在中度盐碱(5 g/kg)处理下达到最大;藜麦幼苗农艺参数、光合参数、渗透物质含量、抗氧化酶活性及根系活力在重度盐碱胁迫下明显下降,丙二醛含量在重度盐碱胁迫(7 g/kg)下达到最大,说明盐碱程度的加深显著影响藜麦幼苗的生长。在同一盐碱水平上,低浓度烯效唑浸种处理后,藜麦幼苗的根冠比、壮苗指数、叶绿素含量、渗透物质含量、抗氧化酶活性和根系活力均显著升高,丙二醛含量有所下降,且浸种浓度在15 mg/L时缓解盐胁迫效应最为显著。
In order to investigate the mitigative effects of seed soaking with uniconazole on the growth of quinoa seedlings under saline-alkali stress,Longli 1 was used as experimental material,the effects of seed soaking with uniconazole(0,15,30,45 and 60 mg/L)at different concentrations on the agronomic characteristics and physiological parameters of quinoa at seedling stage(28 d after sowing)under different saline-alkali stress(CK 0 g/kg,mild saline-alkali 3 g/kg,moderate saline-alkali 5 g/kg,heavy saline-alkali 7 g/kg)were studied by pot experiment.The results showed that the osmotic substance contents,antioxidant enzyme activities and root activity of quinoa seedlings were increased under low salinity(3 g/kg),so as to cope with saline-alkali environment and alleviate oxidative damage.The root-shoot ratio and seedling strength index reached the maximum under moderate saline-alkali(5 g/kg)treatment.The agronomic parameters,photosynthetic parameters,osmotic substance contents,antioxidant enzyme activities and root activity of quinoa seedlings decreased significantly under high salinity,and malondialdehyde content reached the maximum under heavy saline-alkali(7 g/kg),the results indicated that the growth of quinoa seedlings was significantly affected by salinity.At the same saline-alkali level,the root-shoot ratio,seedling strength index,chlorophyll content,osmotic substance contents,antioxidant enzyme activities and root activity of quinoa seedlings were significantly increased after seed soaking with low concentration of uniconazole,the content of malondialdehyde decreased,and the effect was the most significant when the concentration of seed soaking was 15 mg/L.
作者
合佳敏
张永清
张萌
梁萍
王丹
严翻翻
He Jiamin;Zhang Yongqing;Zhang Meng;Liang Ping;Wang Dan;Yan Fanfan(College of Life Sciences,Shanxi Normal University,Taiyuan 030000,Shanxi,China;College of Geography,Shanxi Normal University,Taiyuan 030000,Shanxi,China)
出处
《作物杂志》
北大核心
2024年第2期234-241,共8页
Crops
基金
国家自然科学基金(31571604)
山西省研究生创新项目(2022Y492)。
关键词
盐碱胁迫
烯效唑
藜麦
壮苗指数
生理特性
Saline-alkali stress
Uniconazole
Quinoa
Seedling strength index
Physiological characteristics
