Effects of CO2 Enrichment and Drought on Photosynthesis, Growth and Yield of an Old and a Modern Barley Cultivar
Effects of CO2 Enrichment and Drought on Photosynthesis, Growth and Yield of an Old and a Modern Barley Cultivar
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二氧化碳富集和干旱对古老和现代大麦品种光合作用、生长和产量的影响
DOI：
10.1111/jac.12127
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发表时间：
--
影响因子：
3.5
通讯作者：
Fangmeier A.
中科院分区：
文献类型：
--
作者：
Schmid;Franzaring J;Müller M;Brohon N;Calvo O.C;Högy P;Fangmeier A.
大气CO2浓度升高会改变作物对干旱的敏感性。我们测试了CO2浓度升高和干旱对较老的啤酒大麦品种Golden Promise（GP）和新品种Bambina（BA）的影响。假设CO2富集减轻干旱的不利影响，GP显示出更强的响应CO2富集比BA，两个品种的植物生长在气候室。最佳和减少浇水水平和两个CO2浓度（380和550 ppm），以调查光合参数，生长和产量。与预期相反，CO2增加了34%的总植物生物量在现代品种，而生长刺激在GP不显着。作为对干旱的反应，BA在CO2浓度升高时生物量减少，而GP中没有。干旱对小麦产量和收获指数（HI）有显著的负效应，而CO2浓度升高则增加了产量和收获指数。与GP相比，BA形成更高的籽粒产量，并且具有更高的籽粒产量和HI的水分利用效率。CO2施肥补偿了干旱对籽粒产量和HI的负面影响，特别是在GP。气孔导度被证明是对干旱最敏感的气体交换参数。BA的光合速率对干旱的反应比GP更明显。总的来说，BA对供水和CO2富集的变化的反应比老GP更强烈。
Susceptibility of crops to drought may change under atmospheric CO2enrichment. We tested the effects of CO2enrichment and drought on the older malting barley cultivar Golden Promise (GP) and the recent variety Bambina (BA). Hypothesizing that CO2enrichment mitigates the adverse effects of drought and that GP shows a stronger response to CO2enrichment than BA, plants of both cultivars were grown in climate chambers. Optimal and reduced watering levels and two CO2concentrations (380 and 550 ppm) were used to investigate photosynthetic parameters, growth and yield. In contrast to expectations, CO2increased total plant biomass by 34 % in the modern cultivar while the growth stimulation was not significant in GP. As a reaction to drought, BA showed reduced biomass under elevated CO2, which was not seen in GP. Grain yield and harvest index (HI) were negatively influenced by drought and increased by CO2enrichment. BA formed higher grain yield and had higher water‐use efficiency of grain yield and HI compared to GP. CO2fertilization compensated for the negative effect of drought on grain yield and HI, especially in GP. Stomatal conductance proved to be the gas exchange parameter most sensitive to drought. Photosynthetic rate of BA showed more pronounced reaction to drought compared to GP. Overall, BA turned out to respond more intense to changes in water supply and CO2enrichment than the older GP.
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DOI：
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发表时间：
1975
期刊：
影响因子：
--
作者：
P. Biscoe;J. N. Gallagher;E. J. Littleton;J. Monteith;R. K. Scott
通讯作者：
R. K. Scott
古代和现代啤酒大麦的氮经济
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
L. Abeledo;D. Calderini;G. Slafer
通讯作者：
G. Slafer
小麦二倍体、四倍体和六倍体品种对CO2升高的响应研究
影响因子：
3.5
作者：
D. C. Uprety;N. Dwivedi;A. Raj;S. Jaiswal;G. Paswan;V. Jain;H. Maini
通讯作者：
H. Maini
管理系统中光合作用和气孔对 [CO2] 升高的长期反应
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
S. Long;E. Ainsworth;C. Bernacchi;P. Davey;P. Morgan;G. Hymus;A. Leakey;C. Osborne
通讯作者：
C. Osborne
影响因子：
1.9
作者：
Giunta, F;Motzo, R;Deidda, M
通讯作者：
Deidda, M