The role of leaf senescence in relation to nitrogen uptake and translocation to the reproductive plant organs for genotypic differences in nitrogen efficiency of rapeseed

叶片衰老与氮吸收和向生殖植物器官转运有关的油菜氮效率基因型差异的作用

• 批准号: 111001403
• 负责人: Professor Dr. Walter J. Horst
• 金额: --
• 依托单位: Institut für Pflanzenernährung
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/111001403?language=en
• 关键词: role; leaf; senescence; relation; nitrogen

Decreasing the high nitrogen (N) balance surpluses in winter oilseed-rape production requires the breeding and cultivation of N-efficient cultivars. The overall objective of the project is the clarification of the role of leaf senescence and N mobilization from leaves in grain yield formation of rapeseed genotypes at limited N supply (N efficiency). The project thus represents the bridge between the projects within the research groups dealing with molecular aspects of N dynamics during leaf senescence and the oilseed-rape breeders aiming at improving the N efficiency of the crop. We hypothesize that (i) genotypic differences in delayed leaf senescence are governed by root growth and activity and/or leaf-inherent factors which can be characterized already at early vegetative stages and (ii) the main effects of delayed leaf senescence on reproductive yield are higher photosynthetic productivity of the leaves and longer duration of N translocation to the reproductive organs. To test these hypotheses we will conduct experiments with genotypes differing in N efficiency and leaf senescence at yield/growth-limiting and unlimiting N supply in the field in cooperation with a rapeseed breeder, under controlled conditions until maturity, and at the seedling stage in cooperation with the molecular working groups.

减少冬季油菜生产中的高氮（N）平衡过剩需要培育和培育氮效率高的品种。该项目的总体目标是阐明在有限氮供应（氮效率）下，叶片衰老和叶片氮动员在油菜基因型籽粒产量形成中的作用。因此，该项目代表了处理叶片衰老过程中氮动态分子方面的研究小组和旨在提高作物氮效率的油菜育种者之间的桥梁。我们假设（i）延迟叶片衰老的基因型差异受根系生长和活性和/或叶片固有因素的控制，这些因素可以在早期营养阶段表征；（ii）延迟叶片衰老对繁殖产量的主要影响是叶子的光合生产力更高，氮转移到生殖器官的持续时间更长。为了检验这些假设，我们将与油菜籽育种者合作，在受控条件下直至成熟以及在苗期合作，在产量/生长限制和田间无限氮供应下，对氮效率和叶片衰老不同的基因型进行实验与分子工作组。

项目成果

Root‐growth characteristics contributing to genotypic variation in nitrogen efficiency of oilseed rape

根生长特征导致油菜氮效率基因型变异

• DOI: 10.1002/jpln.201100301
• 发表时间: 2012
• 期刊: Journal of Plant Nutrition and Soil Science
• 影响因子: 2.5
• 作者: Ulas A;Schulte auf´m Erley G;Kahm M;Wiesler F;Horst W.J.
• 通讯作者: Horst W.J.

Contribution of Nitrogen Uptake and Retranslocation during Reproductive Growth to the Nitrogen Efficiency of Winter Oilseed-Rape Cultivars (Brassica napus L.) Differing in Leaf Senescence

• DOI: 10.3390/agronomy6010001
• 发表时间: 2016-03-01
• 期刊: AGRONOMY-BASEL
• 影响因子: 3.7
• 作者: Koeslin-Findeklee, Fabian;Horst, Walter J.
• 通讯作者: Horst, Walter J.

Does genotypic variation in nitrogen remobilisation efficiency contribute to nitrogen efficiency of winter oilseed-rape cultivars (Brassica napus L.)?

氮再利用效率的基因型变异是否有助于冬季油菜品种（甘蓝型油菜）的氮效率？

• DOI: 10.1007/s11104-013-1688-y
• 发表时间: 2013
• 期刊: Plant and Soil
• 影响因子: 4.9
• 作者: Ulas A;Behrens T;Wiesler F;Schulte auf’m Erley G.
• 通讯作者: Schulte auf’m Erley G.

Agronomic traits contributing to nitrogen efficiency of winter oilseed rape cultivars

• DOI: 10.1016/j.fcr.2011.06.009
• 发表时间: 2011-10-09
• 期刊: FIELD CROPS RESEARCH
• 影响因子: 5.8
• 作者: Erley, Gunda Schulte auf'm;Behrens, Torsten;Horst, Walter J.
• 通讯作者: Horst, Walter J.

Defoliation affects seed yield but not N uptake and growth rate in two oilseed rape cultivars differing in post-flowering N uptake

落叶影响种子产量，但不影响花后氮吸收不同的两个油菜品种的氮吸收和生长率

• DOI: 10.1016/j.fcr.2015.04.005
• 发表时间: 2015
• 期刊: Field Crops Research
• 影响因子: 5.8
• 作者: Ulas A;Behrens T;Wiesler F;Horst W.J;Schulte auf’m Erley G.
• 通讯作者: Schulte auf’m Erley G.