Revealing the underlying molecular basis of phosphorus recycling in the green manure crop Astragalus sinicus

第一作者：Yibo Zhang

第一单位：中国农科院农业资源与农业区划研究所

第一通讯：Xianqing Jia

 Abstarct 

背景回顾：The use of green manure as an organic fertilizer to main crops has been widely proposed as a sustainable method for ecological restoration and increasing soil fertility in degraded environments. 

利用绿肥作为主要作物的有机肥料，这一措施已被广泛认为是在退化环境中进行生态恢复和增加土壤肥力的一种可持续方法。

研究目的：Given the increasing excessive application of phosphate (Pi) fertilizer and the accompanying risk of environmental pollution, a strategy is required to increase the Pi absorption efficiency of green manures with nitrogen (N)-fixing ability and further improve N–P recycling and the soil remediation effect in agroecosystems. 

鉴于磷（Pi）肥料的过度施用，以及紧随而来的环境污染风险，我们需要采取某种策略来提升具有固氮能力的绿肥的磷吸收效率，进一步改善农业生态系统中的氮磷循环和土壤修复效果。

研究对象：Leguminous crops, such as milk vetch (Astragalus sinicus), are the most widely used green manure plant species. 

豆科作物紫云英（Astragalus sinicus）是使用最为普遍的绿肥植物。

结果1-耐低磷品种筛选：In this study, through physiological assessments of different Astragalus sinicus cultivars under Pi starvation, an elite variety, Astragalus sinicus Xinzi-1 was identified, which showed high tolerance to Pi starvation and approximately 25%–60% higher Pi content than other varieties. 

本文中，作者通过对不同紫云英品种在缺磷条件下的生理评估，鉴定到了一个表现优良的紫云英品种Xinzi-1，该品种对缺磷表现出很强的耐受性，其Pi含量比其他品种高约25%-60%。

结果2-比较转录组：Comparative transcriptome analysis showed that, upon Pi starvation, the expression profiles of core genes involved in Pi transport and signaling were globally and dramatically altered in Xinzi-1. Specifically, the expression of genes encoding Pi uptake transporters and acid phosphatases in Xinzi-1 were remarkably induced under Pi deficient condition. 

转录组比较分析表明，在Pi饥饿后，Xinzi-1中参与Pi转运和信号传导的核心基因表达谱发生了全面而又显著的改变。尤其是，缺磷条件能够显著诱导Xinzi-1中编码Pi吸收转运蛋白和酸性磷酸酶的基因的表达。

结论：The results showed that increasing the Pi absorption efficiency of N-fixing green manure can improve the N–P recycling efficiency and soil remediation effect of green manures. This study also provides new insights for future research on appropriate breeding guidance, variety evaluation, and field management of green manures in sustainable agroecosystems.

本文的研究结果表明，提高固氮绿肥对磷的吸收效率可以提高绿肥的氮磷循环效率和土壤修复效果。本文的研究也为未来在可持续农业生态系统中，有关绿肥合适的育种指导、品种评估和田间管理等方面的研究提供了新的见解。

** 易可可 **

doi: https://doi.org/10.1016/j.jclepro.2022.130924

Journal: Journal of Cleaner Production

Published date: March 20, 2022