DynaMo Center, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark.
Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark.
Physiol Plant. 2018 Feb;162(2):251-260. doi: 10.1111/ppl.12664. Epub 2017 Nov 23.
Nitrogen, as limiting nutrient for plant growth and crop yield, is a main component of fertilizers and heavily used in modern agriculture. Early reports from over-application of fertilizers in crop production have shown to repress the transition from vegetative to reproductive phase. For the model plant Arabidopsis thaliana, there is evidence that low nitrogen conditions promote early flowering, while high nitrogen as well as nitrogen starvation conditions display the opposite effect. To gain a better understanding of how nitrogen affects the onset of flowering, we reviewed the existing literature for A. thaliana and carried out a meta-analysis on available transcriptomics data, seeking for potential genes and pathways involved in both nitrogen responses and flowering time control. With this strategy, we aimed at identifying potential gateways for integration of nitrogen signaling and potential regulators that might link the regulatory networks controlling nitrogen and flowering in A. thaliana. We found that photoperiodic pathway genes have high potential to be involved in nitrogen-dependent flowering.
氮是植物生长和作物产量的限制营养物，是肥料的主要组成部分，在现代农业中被大量使用。早期的肥料在作物生产中的过度应用报告表明，它会抑制营养生长向生殖生长的转变。对于模式植物拟南芥，有证据表明低氮条件会促进早期开花，而高氮和氮饥饿条件则会产生相反的效果。为了更好地了解氮如何影响开花的开始，我们回顾了拟南芥的现有文献，并对现有转录组学数据进行了荟萃分析，寻找参与氮响应和开花时间控制的潜在基因和途径。通过这种策略，我们旨在确定氮信号转导的潜在整合途径，以及可能将控制氮和开花的调控网络联系起来的潜在调节剂。我们发现，光周期途径基因很有可能参与氮依赖的开花。
