2,4-表油菜素内酯对甜高粱和青贮玉米幼苗耐涝性的影响

doi:10.11733/j.issn.1007-0435.2022.11.032

草地学报 ›› 2022, Vol. 30 ›› Issue (11): 3140-3147.DOI: 10.11733/j.issn.1007-0435.2022.11.032

• 技术研发 • 上一篇

2,4-表油菜素内酯对甜高粱和青贮玉米幼苗耐涝性的影响

苏杭^1,2, 翟建荣¹, 邓苛莉³, 栗扬³, 杨建峰¹, 綦才¹, 郭彦军²

1. 西南大学动物科学技术学院, 重庆 400716;
2. 青岛农业大学草业学院, 山东青岛 266109;
3. 西南大学农学与生物科技学院, 重庆 400716

收稿日期:2022-05-08 修回日期:2022-06-25 发布日期:2022-12-02
通讯作者: 郭彦军,E-mail:qhgyj@126.com
作者简介:苏杭(1997-)，女，彝族，云南红河人，硕士研究生，主要从事饲草作物科学研究，E-mail：3505265248@qq.com
基金资助:
国家自然科学基金项目(31670407)；山东省草学一流学科建设项目资助

Effects of 2,4-Epibrassionolide on Water-Flooding Resistance of Sweet Sorghum and Silage Maize

SU Hang^1,2, ZHAI Jian-rong¹, DENG Ke-li³, LI Yang³, YANG Jian-feng¹, QI Cai¹, GUO Yan-jun²

1. College of Animal Science and Technology, Southwest University, Chongqing 400716, China;
2. College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China;
3. College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China

Received:2022-05-08 Revised:2022-06-25 Published:2022-12-02

摘要/Abstract

摘要： 为探讨2,4-表油菜素内酯(2,4-epibrassionolide，EBR)对饲草作物种子萌发及幼苗耐涝性的影响，本文研究了甜高粱(Sorghum saccharatum Moench)和青贮玉米(Zea mays)种子萌发及幼苗理化指标对EBR引发种子的响应。结果表明，当EBR浓度为0.01μmol·L^-1时，两种植物的胚芽和胚根长均显著高于其它浓度处理(P<0.05)，且在高浓度时(10μmol·L^-1)胚芽和胚根长均显著低于其它浓度处理。水涝胁迫后，两种植物均表现为株高和干重显著下降(P<0.05)，其中甜高粱株高下降幅度(平均26.25%)大于干重(11.66%)，而青贮玉米干重下降幅度(43.82%)大于株高(20.13%)。EBR引发种子显著提高了水涝胁迫下植株的株高和干重、抗氧化酶活性和游离脯氨酸含量(P<0.05)，降低了丙二醛含量(P<0.05)。综合分析认为，引发通过增加抗氧化酶活性及游离脯氨酸含量，降低膜脂过氧化，最终提高饲草作物幼苗在水涝胁迫下的株高和干重。

关键词: 青贮玉米, 甜高粱, 种子引发, 2,4-表油菜素内酯(EBR), 水涝胁迫

Abstract: In order to investigate the influence of seed priming with 2,4-epibrassionolide (EBR) on seed germination and seedling tolerance of forage crops to waterflooding,the responses of seed germination properties and physiological parameters of seedlings to seed priming were evaluated. The results showed that the priming efficiency was depended upon the EBR concentrations,with the highest radicle and germ lengths at 0.01 μmol·L^-1 and the lowest at 10 μmol·L^-1 for both crops. Under the conditions of waterflooding,plant heights and dry weight reduced at three tested stages,about 26.25% decrease for the height of sweet sorghum,which decreased more than dry weight (11.66%). For maize,the dry weights reduced about 43.82%,which decreased more than plant height (20.13%). Overall,EBR priming increased the activities of antioxidative enzymes in plants under waterflooding conditions,resulting in the decrease of malondialdehyde contents and the increase of free proline contents,and finally improved the crop heights and dry weights.

Key words: Zea mays, Sorghum saccharatum Moench, Seed priming, 2,4-Epibrassionolide (EBR), Waterflooding

中图分类号:

Q945.78

苏杭, 翟建荣, 邓苛莉, 栗扬, 杨建峰, 綦才, 郭彦军. 2,4-表油菜素内酯对甜高粱和青贮玉米幼苗耐涝性的影响[J]. 草地学报, 2022, 30(11): 3140-3147.

SU Hang, ZHAI Jian-rong, DENG Ke-li, LI Yang, YANG Jian-feng, QI Cai, GUO Yan-jun. Effects of 2,4-Epibrassionolide on Water-Flooding Resistance of Sweet Sorghum and Silage Maize[J]. Acta Agrestia Sinica, 2022, 30(11): 3140-3147.

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2,4-表油菜素内酯对甜高粱和青贮玉米幼苗耐涝性的影响

Effects of 2,4-Epibrassionolide on Water-Flooding Resistance of Sweet Sorghum and Silage Maize

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