Modeling root loss reveals impacts on nutrient uptake and crop development.
Modeling root loss reveals impacts on nutrient uptake and crop development.
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DOI：
10.1093/plphys/kiac405
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发表时间：
2022-11-28
期刊：
影响因子：
7.4
通讯作者：
Lynch, Jonathan P.
中科院分区：
文献类型：
--
作者：
Schafer, Ernst D.;Owen, Markus R.;Band, Leah R.;Farcot, Etienne;Bennett, Malcolm J.;Lynch, Jonathan P.
尽管植物中普遍存在根系丧失，但其对作物生产力的影响尚未完全了解。虽然根的丧失降低了植物从土壤中吸收水分和养分的能力，但它可能通过减少维持根系所需的资源而带来好处。本研究采用开源、功能-结构的根系/土壤模拟模型OpenSimRoot，模拟了大麦（Hordeum vulgare）、普通豆（Phaseolus vulgaris）和玉米（Zea mays）在不同土壤条件下的一系列根系表型和根系流失情况。该模型使我们能够量化在这些情况下根系损失对茎干重的影响，并确定在哪些情况下根系损失是有益的，有害的，或没有影响。模拟结果表明，在所有试验情景下，根系损失都不利于磷的吸收，而氮的吸收对根系损失相对不敏感，除非主要根轴丢失。在所有物种和土壤的所有表型中，轴根损失降低了地上部干重，而侧根损失的影响较小。在未受磷胁迫的高侧根密度大麦和玉米植株上，侧根的损失增加了茎干重。在这些情况下，茎干重因根系损失而增加的事实表明，在某些环境中，例如在高投入农业中发现的环境中，植物的根系过量生产。我们得出结论，更好地了解根系损失对植物发育的影响是优化根系表型以实现产量最大化的重要组成部分。根系损失对作物发育和养分吸收有重大影响；模型显示，影响的大小取决于物种，根系表型和土壤条件。
Despite the widespread prevalence of root loss in plants, its effects on crop productivity are not fully understood. While root loss reduces the capacity of plants to take up water and nutrients from the soil, it may provide benefits by decreasing the resources required to maintain the root system. Here, we simulated a range of root phenotypes in different soils and root loss scenarios for barley (Hordeum vulgare), common bean (Phaseolus vulgaris), and maize (Zea mays) using and extending the open-source, functional–structural root/soil simulation model OpenSimRoot. The model enabled us to quantify the impact of root loss on shoot dry weight in these scenarios and identify in which scenarios root loss is beneficial, detrimental, or has no effect. The simulations showed that root loss is detrimental for phosphorus uptake in all tested scenarios, whereas nitrogen uptake was relatively insensitive to root loss unless main root axes were lost. Loss of axial roots reduced shoot dry weight for all phenotypes in all species and soils, whereas lateral root loss had a smaller impact. In barley and maize plants with high lateral branching density that were not phosphorus-stressed, loss of lateral roots increased shoot dry weight. The fact that shoot dry weight increased due to root loss in these scenarios indicates that plants overproduce roots for some environments, such as those found in high-input agriculture. We conclude that a better understanding of the effects of root loss on plant development is an essential part of optimizing root system phenotypes for maximizing yield. Root loss has a major impact on crop development and nutrient uptake; modeling reveals that the magnitude of the effect depends on species, root phenotype, and soil conditions.
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DOI：
10.1139/b87-105
发表时间：
1987-04-01
期刊：
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
影响因子：
--
作者：
HAYES, DC;SEASTEDT, TR
通讯作者：
SEASTEDT, TR
影响因子：
2.7
作者：
CHAPIN, FS;GROVES, RH;EVANS, LT
通讯作者：
EVANS, LT
影响因子：
6.9
作者：
Guo, Haichao;York, Larry M.
通讯作者：
York, Larry M.
影响因子：
9.4
作者：
Fisher, MCT;Eissenstat, DM;Lynch, JP
通讯作者：
Lynch, JP
影响因子：
2
作者：
DUCZEK, LJ;JONESFLORY, LL
通讯作者：
JONESFLORY, LL