Enhancing photosynthetic phosphorus use efficiency through coordination of leaf phosphorus fractions, allocation, and anatomy during soybean domestication.

IF 5.6 2区 生物学 Q1 PLANT SCIENCES Journal of Experimental Botany Pub Date : 2025-03-13 DOI:10.1093/jxb/erae427
Geng Chen, Qiu-Xia Ran, Cai Wang, Jiayin Pang, Ming-Jian Ren, Zheng-Yu Wang, Jin He, Hans Lambers
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Abstract

Soybean domestication has significantly changed key agronomic traits, yet its impact on leaf photosynthetic phosphorus use efficiency (PPUE) and its underlying traits remains poorly known. Further information on this would be important to increase soybean P use efficiency. To address this gap, 48 soybean accessions (16 wild relatives, 16 landraces, and 16 cultivars) were used to compare leaf anatomical traits, foliar chemical P fractions, P allocation, and PPUE under two P levels. The results showed that the cultivars had higher area-based and mass-based photosynthesis rates, PPUE, metabolite P concentration, and its percentage of leaf total P, as well as a greater percentage of lipid P, nucleic acid P, and residual P. Conversely, wild relatives tended to have higher leaf P concentration, palisade:spongy thickness ratio, and concentrations of inorganic P, nucleic acid P, lipid P, and residual P. PPUE was negatively correlated with leaf inorganic P concentration and its percentage relative to leaf total P, while it was positively correlated with the concentration and percentage of metabolite P. We concluded that soybean domestication increased PPUE, as a result of both increased photosynthesis rate and decreased leaf P concentration; domestication reduced the palisade:spongy thickness ratio coupled with increased allocation of P to P-containing metabolites, thereby contributing to faster photosynthesis and higher PPUE. This study sheds light on the significance of leaf P allocation and anatomical traits affecting PPUE during soybean domestication, offering a mechanistic understanding to further enhance soybean P use efficiency.

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在大豆驯化过程中,通过协调叶片磷的组分、分配和解剖,提高光合作用磷的利用效率。
大豆驯化已显著改变了其主要农艺性状,但其对叶片光合磷利用效率(PPUE)及其基本性状的影响仍鲜为人知。进一步了解这方面的信息对于提高大豆的磷利用效率非常重要。为了填补这一空白,研究人员利用 48 个大豆品种(16 个野生近缘种、16 个陆生种和 16 个栽培品种)比较了两种磷水平下的叶片解剖学性状、叶片化学磷组分、磷分配和 PPUE。结果表明,栽培品种的面积光合作用率和质量光合作用率、PPUE、代谢物 P 浓度及其占叶片总 P 的百分比以及脂质 P、核酸 P 和残余 P 的百分比都较高;相反,野生近缘植物的叶片 P 浓度、叶栅与海绵厚度比以及无机 P、核酸 P、脂质 P 和残余 P 的浓度都较高。我们的结论是,大豆驯化提高了 PPUE,这是光合作用速率提高和叶片 P 浓度降低的结果;驯化降低了叶片:海绵厚度比,同时增加了 P 在含 P 代谢物中的分配,从而加快了光合作用,提高了 PPUE。该研究揭示了大豆驯化过程中叶片P分配和解剖学性状对PPUE的影响,为进一步提高大豆P利用效率提供了机理认识。
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来源期刊
Journal of Experimental Botany
Journal of Experimental Botany 生物-植物科学
CiteScore
12.30
自引率
4.30%
发文量
450
审稿时长
1.9 months
期刊介绍: The Journal of Experimental Botany publishes high-quality primary research and review papers in the plant sciences. These papers cover a range of disciplines from molecular and cellular physiology and biochemistry through whole plant physiology to community physiology. Full-length primary papers should contribute to our understanding of how plants develop and function, and should provide new insights into biological processes. The journal will not publish purely descriptive papers or papers that report a well-known process in a species in which the process has not been identified previously. Articles should be concise and generally limited to 10 printed pages.
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