CO2 elevation and nitrogen supply alter the growth and physiological responses of tomato and barley plants to drought stress
CO2 elevation and nitrogen supply alter the growth and physiological responses of tomato and barley plants to drought stress
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二氧化碳浓度升高和氮供应改变番茄和大麦植物对干旱胁迫的生长和生理反应
DOI：
10.3390/agronomy12081821
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发表时间：
2022-07
期刊：
影响因子：
--
通讯作者：
Fulai Liu
中科院分区：
文献类型：
--
作者：
Yiting Chen;Zhenhua Wei;Heng Wan;Jiarui Zhang;Jie Liu;Fulai Liu
全球气候变化将改变植物的生长和生理。为了更好地了解这种影响的后果，研究了在两种N供应水平（N1, 0.5 g N pot - 1和N2, 1.0 g N pot - 1）下，大麦和番茄叶片水分关系和氮(N)利用效率对CO2升高800 ppm和进进式干旱胁迫的响应。这些植物分别生长在两个单独的植物培养皿中，环境二氧化碳浓度为400 ppm)和400 ppm。测定叶片生理参数及碳(C)、氮(N)浓度；评价植物生长、水分和氮利用效率。结果表明，CO2增加了两种植物的光合作用和水分利用效率（WUE），降低了比叶面积（SLA），而氮供应水平对大麦和番茄植株的光合作用和水分利用效率（WUE）有不同程度的影响。在土壤逐渐干燥过程中，脱落酸（ABA）诱导的气孔关闭在两种植物之间存在差异，大麦植物的气孔导度（gs）比番茄植物对叶片ABA更敏感，但CO2环境对两种植物的响应没有影响。相比之下，CO2降低了大麦的蒸腾速率（Tplant），但对番茄没有影响。e[CO2分别通过提高大麦叶片C浓度（Cleaf）和番茄叶片N浓度（Nleaf）提高植株叶片C:N比（[C:Nleaf），但N2显著降低[C:Nleaf]，说明N处理是主要控制因子[C:Nleaf]。总的来说，适当的氮供应可以调节植物对二氧化碳和土壤水分缺乏的适应。该研究为不同植物适应未来干旱和富二氧化碳环境的氮管理提供了一些新的见解。
Global climate change will modify plants in terms of growth and physiology. To better understand the consequences of this effect, the responses of the leaf water relations and nitrogen (N) use efficiency of barley and tomato plants to elevated CO2 800 ppm) combined with progressive drought stress at two levels of N supply (N1, 0.5 g N pot−1 and N2, 1.0 g N pot−1) were studied. The plants were grown in two separate phytotrons at ambient CO2 400 ppm) and respectively. The leaf physiological parameters as well as carbon (C) and N concentrations were determined; plant growth, water and N use efficiencies were evaluated. The results showed that e[CO2 increased photosynthesis and water use efficiency (WUE) while decreased specific leaf area (SLA) in both species, whereas N supply level differentially influenced WUE in barley and tomato plants. The abscisic acid (ABA)-induced stomatal closure during progressive soil drying varied between the two species where the stomatal conductance (gs) of barley plants was more sensitive to leaf ABA than tomato plants, though CO2 environment did not affect the response in both species. Compared to e[CO2 reduced plant transpiration rate (Tplant) in barley but not in tomato. e[CO2 increased the leaf C:N ratio ([C:Nleaf) in plants by enhancing leaf C concentration ([Cleaf) in barley and by dilution of leaf N concentration ([Nleaf) in tomato, respectively, but N2 substantially decreased [C:Nleaf, and thus, N treatment was the dominant factor controlling [C:Nleaf. Collectively, appropriate N supply may modulate the acclimation of plants to e[CO2 and soil water deficits. This study provides some novel insights into N management of different plant species for adapting to future drier and CO2-enriched environment.
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DOI：
10.1111/nph.13224
发表时间：
2015-03
期刊：
The New phytologist
影响因子：
--
作者：
Cotton TEA;Fitter AH;Miller RM;Dumbrell AJ;Helgason T
通讯作者：
Helgason T
影响因子：
6.9
作者：
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影响因子：
5.2
作者：
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通讯作者：
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DOI：
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发表时间：
1950-10
期刊：
The Botanical Review
影响因子：
--
作者：
L. M. Shields
通讯作者：
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影响因子：
64.8
作者：
H. Meidner;T. Mansfield
通讯作者：
H. Meidner;T. Mansfield