Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions
Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions
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DOI：
10.1093/jxb/erw033
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发表时间：
2016-04-01
影响因子：
6.9
通讯作者：
Jorgensen, Rikke B.
中科院分区：
文献类型：
--
作者：
Ingvordsen, Cathrine H.;Gislum, Rene;Jorgensen, Rikke B.
本研究以108份春大麦（H. vulgare L.）在预测的未来温度水平和[CO2]作为单一因素和组合因素（IPCC，AR 5，RCP 8.5）下栽培了100份种质。在所有基因型中，升高[CO2]（700 ppm白天/晚上）使蛋白质浓度略微降低5%，而升高温度（+5 ℃白天/晚上）使蛋白质浓度大幅增加29%。联合处理使各品种的蛋白质浓度增加了8%。这是一个增加小于预测的严格加性效应的个别治疗。尽管谷物蛋白质浓度增加，但在高温和升高的[CO2]条件下谷物产量降低，导致可收获蛋白质减少23%。108份材料的响应存在差异，这可能会被利用，以至少保持如果不增加可收获的谷物蛋白在未来的气候变化条件下。
In the present study a set of 108 spring barley (H. vulgare L.) accessions were cultivated under predicted future levels of temperature and [CO2] as single factors and in combination (IPCC, AR5, RCP8.5). Across all genotypes, elevated [CO2] (700 ppm day/night) slightly decreased protein concentration by 5%, while elevated temperature (+5 degrees C day/night) substantially increased protein concentration by 29%. The combined treatment increased protein concentration across accessions by 8%. This was an increase less than predicted from strictly additive effects of the individual treatments. Despite the increase in grain protein concentration, the decrease in grain yield at combined elevated temperature and elevated [CO2] resulted in 23% less harvestable protein. There was variation in the response of the 108 accessions, which might be exploited to at least maintain if not increase harvestable grain protein under future climate change conditions.