干旱和CO2浓度升高对不同春小麦光合作用和气孔阻力及水分蒸腾效率的影响
Effects of elevated CO2 concentration and drought on the photosynthesis and stomatal resistance and transpiration efficiency of different strains of spring wheat
查看参考文献12篇
文摘
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为考察春小麦不同抗旱性品种对干旱和高CO2反应的差异,在不同土壤持水量和CO2浓度梯度条件下,对高产性高原602和抗旱性定西24两种春小麦交叉处理一个生长季,结果发现CO2浓度倍增,使两种春小麦的光合速率、气孔阻力和水分蒸腾效率显著增加,增加幅度与土壤含水量分别为正、负和正相关.这种变化幅度在抗旱性不同的春小麦之间进行比较,尤其是在干旱条件下,发现春小麦光合作用、气孔阻力和水分蒸腾效率的变化幅度,抗旱性强的春小麦表现出更有利于生长的趋势.这说明春小麦对CO2浓度升高的反应存在着品种间的差异,也就是说不仅和土壤持水量相关而且还与春小麦抗旱性有关. |
其他语种文摘
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Two strains of spring wheat (Triticum aestivum L.-high productive Gaoyuan 602 and droughttolerating Dingxi 24) were grown at two different CO2 concentrations (350 and 700 μmol·mol^-1) and three soil water levels (80%, 60%, 40%FWC) in open-top-chambers from sowing until final harvest. We examined the response of photosynthesis and stomatal resistance to increasing CO2 concentration and drought and found that the photosynthesis rate and stomatal resistance and transpiration efficiency in the two spring wheats had increased. However, the positive effect of high CO2 on Dingxi 24 was bigger than that on Gaoyuan 602. Dingxi 24 showed higher water saving effect. Based on the analysis of the results, we predict that drought-tolerating spring wheat cultivars will have selective advantages in future high CO2 environment. |
来源
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兰州大学学报. 自然科学版
,2005,41(6):42-46 【核心库】
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关键词
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春小麦(Triticum
;
aestivum
;
L.)
;
CO2浓度升高
;
土壤持水量
;
光合作用
;
气孔阻力
;
蒸腾效率
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地址
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1.
兰州大学, 教育部干旱与草地农业生态重点实验室, 甘肃, 兰州, 730000
2.
中国科学院植物研究所, 北京, 100093
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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0455-2059 |
学科
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植物学 |
基金
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国家科技部国际合作项目
;
国家自然科学基金资助项目
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文献收藏号
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CSCD:2217312
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