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Impact of Elevated CO2 on Seed Quality of Soybean at the Fresh Edible and Mature Stages

文献类型： 外文期刊

作者： Li, Yansheng 1 ; Yu, Zhenhua 1 ; Jin, Jian 1 ; Zhang, Qiuying 1 ; Wang, Guanghua 1 ; Liu, Changkai 1 ; Wu, Junjiang 3 ; W 1 ;

作者机构： 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Harbin, Heilongjiang, Peoples R China

2.La Trobe Univ, Ctr AgriBiosci, Bundoora, Vic, Australia

3.Heilongjiang Acad Agr Sci, Soybean Res Inst, Key Lab Soybean Cultivat, Minist Agr, Harbin, Heilongjiang, Peoples R China

4.Beijing Univ Agr, Coll Pla

关键词： soybean; climate change; mineral nutrients; protein; oil

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Although the effect of elevated CO2 (eCO(2)) on soybean yield has been well documented, few studies have addressed seed quality, particularly at the fresh edible (R6) and mature stages (R8). Under the current global scenario of increasing CO2 levels, this potentially threatens the nutritional content and quality of food crops. Using four soybean cultivars, we assessed the effects of eCO(2) on the concentrations of crude protein, crude oil, and isoflavones and analyzed the changes in free amino acids, fatty acids, and mineral elements in seeds. At R6, eCO(2) had no influence on soybean seed protein and oil concentrations. At R8, eCO(2) significantly decreased seed protein concentration but increased seed oil concentration; it also significantly decreased total free amino acid concentration. However, at the same stage, the proportion of oleic acid (18:1) among fatty acids increased in response to eCO(2) in the cultivars of Zhongke-maodou 2 (ZK-2) and Zhongke-maodou 3 (ZK-3), and a similar trend was found for linoleic acid (18: 2) in Zhongke-maodou 1 (ZK-1) and Hei-maodou (HD). Total isoflavone concentrations increased significantly at both the R6 and R8 stages in response to eCO(2). Compared with ambient CO2, the concentrations of K, Ca, Mg, P, and S increased significantly under eCO(2) at R6, while the Fe concentration decreased significantly. The response of Zn and Mn concentrations to eCO(2) varied among cultivars. At R8 and under eCO(2), Mg, S, and Ca concentrations increased significantly, while Zn and Fe concentrations decreased significantly. These findings suggest that eCO(2) is likely to benefit from the accumulation of seed fat and isoflavone but not from that of protein. In this study, the response of seed mineral nutrients to eCO(2) varied between cultivars.

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