Comparative phenomics of annual grain legume root architecture
Comparative phenomics of annual grain legume root architecture
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DOI：
10.1002/csc2.20241
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发表时间：
2020-09-01
期刊：
影响因子：
2.3
通讯作者：
Lynch, Jonathan P.
中科院分区：
文献类型：
--
作者：
Burridge, James D.;Rangarajan, Harini;Lynch, Jonathan P.
次优的水和磷的有效性是主要限制粮食豆类生产。根结构影响水和磷的获取，但需要更好地理解和减轻权衡。我们假设，根类投资和资源获取策略的权衡将在各种谷物豆类观察。普通菜豆（Phaseolus vulgaris L.）多样性面板，菜豆（Phaseolus acutifolius A.）Gray）、豇豆[Vigna unguiculata（L.）Walp.]，大豆[Glycine max（L.）先生]，鹰嘴豆（Cicer arietinum L.），花生（Arachis hypogaea L.），并在田间对其它豆科植物的单份材料进行了表型分析。我们确定了在大多数物种的不同根类的投资之间的反比关系，在所有物种的深和浅的探索指标之间的关系。豆和tepary豆表现出特别强的权衡投资模式之间的根类，而鹰嘴豆和花生表现出不太明显的权衡。我们发现，豆科植物的根结构表型可以放置在一个根系结构（RSA）谱，根表型的epigeal和hypocalyptaxa提出了不同的适应机制。这些生活策略整合资源的获取，使用和物候的例证对比鹰嘴豆，有许多根轴，tepary豆根轴少，对比水的使用策略。我们提出了几个RSA ideotypes，并强调如何二态根架构可以共同优化资源的获取。
Suboptimal water and P availability are primary limitations to grain legume production. Root architecture influences water and P acquisition, but tradeoffs need to be better understood and mitigated. We hypothesized that tradeoffs in root class investment and resource acquisition strategy would be observable in a variety of grain legumes. Diversity panels of common bean (Phaseolus vulgaris L.), tepary bean (Phaseolus acutifolius A. Gray), cowpea [Vigna unguiculata (L.) Walp.], soybean [Glycine max (L.) Merr.], chickpea (Cicer arietinum L.), groundnut (Arachis hypogaea L.), and single accessions of other legumes were phenotyped in the field. We identified inverse relationships among investments in different root classes in most species, and between indicators of deep and shallow exploration in all species. Bean and tepary bean showed particularly strong tradeoffs in investment patterns among root classes, whereas chickpea and groundnut show less pronounced tradeoffs. We found that legume root architectural phenotypes can be placed on a root system architecture (RSA) spectrum, and that root phenotypes of epigeal and hypogeal taxa present distinct adaptive mechanisms. These life strategies integrating resource acquisition, use, and phenology are exemplified by contrasting chickpea, with many root axes, to tepary bean with few root axes and a contrasting water use strategy. We propose several RSA ideotypes and highlight how dimorphic root architecture may co-optimize resource acquisition.