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Dynamics of photosynthetic induction and relaxation within the canopy of rice and two wild relatives
Food and Energy Security ( IF 4.0 ) Pub Date : 2021-05-05 , DOI: 10.1002/fes3.286 Liana G Acevedo-Siaca 1, 2, 3 , Jacqueline Dionora 4 , Rebecca Laza 4 , William Paul Quick 4, 5 , Stephen P Long 1, 2, 6, 7
Food and Energy Security ( IF 4.0 ) Pub Date : 2021-05-05 , DOI: 10.1002/fes3.286 Liana G Acevedo-Siaca 1, 2, 3 , Jacqueline Dionora 4 , Rebecca Laza 4 , William Paul Quick 4, 5 , Stephen P Long 1, 2, 6, 7
Affiliation
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Wild rice species are a source of genetic material for improving cultivated rice (Oryza sativa) and a means to understand its evolutionary history. Renewed interest in non-steady-state photosynthesis in crops has taken place due its potential in improving sustainable productivity. Variation was characterized for photosynthetic induction and relaxation at two leaf canopy levels in three rice species. The wild rice accessions had 16%–40% higher rates of leaf CO2 uptake (A) during photosynthetic induction relative to the O. sativa accession. However, O. sativa had an overall higher photosynthetic capacity when compared to accessions of its wild progenitors. Additionally, O. sativa had a faster stomatal closing response, resulting in higher intrinsic water-use efficiency during high-to-low light transitions. Leaf position in the canopy had a significant effect on non-steady-state photosynthesis, but not steady-state photosynthesis. The results show potential to utilize wild material to refine plant models and improve non-steady-state photosynthesis in cultivated rice for increased productivity.
中文翻译：
水稻和两种野生近缘种冠层光合诱导和松弛的动态
野生稻物种是改良栽培稻（ Oryza sativa ）的遗传物质的来源，也是了解其进化历史的一种手段。由于作物非稳态光合作用在提高可持续生产力方面的潜力，人们对它重新产生了兴趣。对三种水稻品种的两叶冠层水平的光合作用诱导和松弛的变化进行了表征。与O相比，在光合诱导过程中，野生稻种质的叶片CO 2吸收率( A )高出16%–40%。苜蓿加入。然而， O .与野生祖先的种质相比，苜蓿总体上具有更高的光合作用能力。此外， O .苜蓿具有更快的气孔关闭反应，从而在高光到低光转换期间产生更高的内在水分利用效率。冠层中叶片的位置对非稳态光合作用有显着影响，但对稳态光合作用没有影响。结果表明，利用野生材料来完善植物模型并改善栽培稻的非稳态光合作用以提高生产力的潜力。
更新日期：2021-05-05
中文翻译：
水稻和两种野生近缘种冠层光合诱导和松弛的动态
野生稻物种是改良栽培稻（ Oryza sativa ）的遗传物质的来源，也是了解其进化历史的一种手段。由于作物非稳态光合作用在提高可持续生产力方面的潜力，人们对它重新产生了兴趣。对三种水稻品种的两叶冠层水平的光合作用诱导和松弛的变化进行了表征。与O相比，在光合诱导过程中，野生稻种质的叶片CO 2吸收率( A )高出16%–40%。苜蓿加入。然而， O .与野生祖先的种质相比，苜蓿总体上具有更高的光合作用能力。此外， O .苜蓿具有更快的气孔关闭反应，从而在高光到低光转换期间产生更高的内在水分利用效率。冠层中叶片的位置对非稳态光合作用有显着影响，但对稳态光合作用没有影响。结果表明，利用野生材料来完善植物模型并改善栽培稻的非稳态光合作用以提高生产力的潜力。
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