In silico evidence for the utility of parsimonious root phenotypes for improved vegetative growth and carbon sequestration under drought.
In silico evidence for the utility of parsimonious root phenotypes for improved vegetative growth and carbon sequestration under drought.
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DOI：
10.3389/fpls.2022.1010165
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发表时间：
2022
影响因子：
5.6
通讯作者：
中科院分区：
文献类型：
--
作者：
干旱是作物产量的主要制约因素，预计气候变化将增加未来干旱压力的频率和严重程度。据推测，通过选择适当的根系表型，可以使作物更耐旱，更能在土壤中吸收大气中的碳。我们引入了OpenSimRoot_v2，一个功能结构植物/土壤模型OpenSimRoot的升级版本，并使用它来测试玉米根表型的效用，该表型具有更少和更陡的轴向根，减少的侧根分支密度，以及更多的通气组织形成（即“陡峭，便宜，和深'（SCD）理想型）在干旱和干旱条件下，三种不同的玉米生长土壤气候环境下，在美国、尼日利亚和墨西哥。在所有的环境中，植物受到干旱胁迫的SCD理想型以及几个中间表型导致更大的地上部生物量后42天。作为额外的优点，在6个模拟环境中的5个中，SCD表型在土壤中50 cm以下沉积的碳的量是参考表型的两倍。我们的结论是，作物生长和深层土壤碳沉积可以通过培育玉米植株更少的轴向根，减少侧根分支密度，更多的通气组织形成。
Drought is a primary constraint to crop yields and climate change is expected to increase the frequency and severity of drought stress in the future. It has been hypothesized that crops can be made more resistant to drought and better able to sequester atmospheric carbon in the soil by selecting appropriate root phenotypes. We introduce OpenSimRoot_v2, an upgraded version of the functional-structural plant/soil model OpenSimRoot, and use it to test the utility of a maize root phenotype with fewer and steeper axial roots, reduced lateral root branching density, and more aerenchyma formation (i.e. the ‘Steep, Cheap, and Deep’ (SCD) ideotype) and different combinations of underlying SCD root phene states under rainfed and drought conditions in three distinct maize growing pedoclimatic environments in the USA, Nigeria, and Mexico. In all environments where plants are subjected to drought stress the SCD ideotype as well as several intermediate phenotypes lead to greater shoot biomass after 42 days. As an additional advantage, the amount of carbon deposited below 50 cm in the soil is twice as great for the SCD phenotype as for the reference phenotype in 5 out of 6 simulated environments. We conclude that crop growth and deep soil carbon deposition can be improved by breeding maize plants with fewer axial roots, reduced lateral root branching density, and more aerenchyma formation.
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影响因子：
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作者：
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通讯作者：
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