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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (36): 41-46.doi: 10.11924/j.issn.1000-6850.casb2021-0825

• 农学·农业基础科学 • 上一篇    下一篇

甜菜对低氮胁迫的形态学响应机制

李佳佳1,2(), 魏多1,2, 徐翎清1,2, 王秋红1,2, 马龙彪1,2, 刘大丽1,2()   

  1. 1国家甜菜种质中期库,黑龙江大学,哈尔滨 150080
    2黑龙江省普通高等学校甜菜遗传育种重点实验室/现代农业与生态环境学院,黑龙江大学,哈尔滨 150080
  • 收稿日期:2021-08-25 修回日期:2021-10-13 出版日期:2021-12-25 发布日期:2022-02-15
  • 通讯作者: 刘大丽
  • 作者简介:李佳佳,女,1993年出生,陕西渭南人,在读研究生,研究方向：作物分子生物学。通信地址：150080 黑龙江省哈尔滨市南岗区学府路74号 黑龙江大学现代农业与生态环境学院,Tel：0451-86609494,E-mail： qianxiao20886@163.com。
  • 基金资助:
    黑龙江省自然科学基金项目“BvHIPP24基因在能源甜菜重金属镉污染生物修复中的分子机制研究”(LH2019C057);黑龙江省高校基本科研业务费黑龙江大学专项资金项目“能源甜菜BvMPT11基因的Cd污染生物修复应答机制研究”(KJCX201920);科技部财政部国家科技资源共享服务平台项目“国家作物种质资源库甜菜分库运行服务”(NCGRC-2021-017);农作物种质资源保护与利用专项”甜菜种质资源的收集、鉴定、编目、繁种与入库(圃)保存”(1921-026);黑龙江省普通本科高等学校青年创新人才培养计划“甜菜抗旱遗传资源评价及优异基因挖掘”(UNPYSCT-2020014);国家糖料产业技术体系项目“甜菜种质资源鉴定与新种质创制”(CARS-170102)

The Morphological Response Mechanism of Sugar Beet to Low Nitrogen Stress

LI Jiajia1,2(), WEI Duo1,2, XU Lingqing1,2, WANG Qiuhong1,2, MA Longbiao1,2, LIU Dali1,2()   

  1. 1National Beet Medium-term Gene Bank, Heilongjiang University, Harbin 150080
    2Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
  • Received:2021-08-25 Revised:2021-10-13 Online:2021-12-25 Published:2022-02-15
  • Contact: LIU Dali

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摘要：

为了分析甜菜对低氮胁迫在形态学上的应答机制,本研究以甜菜种质资源‘780016B/12优’为研究对象,对缺氮(N 0 mmol/L)和低氮(N 1.5 mmol/L)条件下甜菜植株的形态和根系构型变化进行了深入分析。结果表明,甜菜遭受氮胁迫时,地上部生物量积累减少,地下部生物量积累增加,根冠比增加,叶面积减少,甜菜生长发育受到抑制。低氮胁迫7~14天后的根系面积、体积和根系分叉数增加量均大于对照(N 10 mmol/L)。氮胁迫下,甜菜的根系构型呈二分体状,且随着胁迫时间和缺氮程度的增加,地下生物量越大,这种状况表现的越为明显。因此可以推断,甜菜植株根系生物量的高低与根系构型有着密切的联系,甜菜通过改变根系比例和根系构型来获得氮素平衡。

关键词: 甜菜, 低氮胁迫, 表型, 形态学响应, 根系构型

Abstract:

In order to analyze the morphological response mechanism of sugar beet to low-nitrogen stress, sugar beet germplasm resource ‘780016B/12 superior’ was used as the research material, the changes of morphology and root architecture of sugar beet were comprehensively analyzed under nitrogen deficiency (N 0 mmol/L) and low nitrogen (N 1.5 mmol/L). The results showed that under nitrogen stress, the above-ground biomass accumulation decreased, the underground biomass accumulation increased, the root to shoot ratio increased, the leaf area decreased, and the growth and development of sugar beet was inhibited. After 7 to 14 days of low nitrogen stress, the increase of root area, volume and root branch number were greater than those of the control (N 10 mmol/L). Under nitrogen stress, the root architecture of sugar beet was dichotomy, and with the increase of stress time and nitrogen deficiency, the greater the underground biomass, the more obvious this phenomenon is. Therefore, it can be inferred that the root biomass of sugar beet is closely related to the root architecture. Sugar beet obtains nitrogen balance by changing the root ratio and root architecture.

Key words: sugar beet, low-nitrogen stress, phenotype, morphological response, root architecture

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