Tags

Type your tag names separated by a space and hit enter

[Effects of Straw Incorporation on Cadmium Accumulation and Subcellular Distribution in Rice].
Huan Jing Ke Xue. 2017 Sep 08; 38(9):3927-3936.HJ

Abstract

Cadmium (Cd) is classified as a Group-1 human carcinogen and rice consumption constitutes a major source of dietary intake of Cd for populations whose staple food is rice. Straw incorporation is widely performed in Cd-contaminated paddy fields, which may significantly affect the bioavailability of Cd in soil and the distribution of Cd in rice plants, consequently altering Cd accumulation in rice grains. In this study, both pot and field trials were conducted to investigate the effects of different amounts of straw incorporation (0.0%, 1.0%, 2.5%, and 5.0%) on Cd sub-cellular distribution in rice plants and Cd accumulation in rice grains. The results showed that Cd was mainly sequestered in cell wall, accounting for 86%-95% and 30%-51% of total cadmium in root and shoot cells, respectively. In shoot cells, about 35%-61% of Cd was distributed in cellular soluble fractions. When rice straw was incorporated at 1.0% and 2.5% levels, Cd sequestration in the cell wall significantly increased and Cd translocation from roots to shoots significantly decreased. However, when rice straw was incorporated at the 5% level, Cd sequestration in root cell walls significantly decreased and Cd translocation from roots to shoots significantly increased at the tillering stage. At the filling stage, 5% rice straw incorporation still significantly increased Cd sequestration in root cell walls and Cd translocation from roots to shoots did not significantly change. The rice straw and rape straw used for the field trail contained high concentrations of Cd (0.49 and 0.67 mg·kg-1, respectively). Rape straw incorporation alone or together with lime did not significantly affect Cd accumulation in brown rice or rice straw. Rice straw incorporation alone did not significantly affect Cd accumulation in brown rice or rice straw, while incorporation with lime significantly decreased Cd accumulation in both brown rice and rice straw. Biochar application can also significantly reduce Cd accumulation in rice and when biochar was added together with lime, the reduction in Cd accumulation in rice was more significant. Therefore, at Cd-contaminated paddy fields, rice straw or rape straw is not suggested to be returned directly; incorporation with lime would be better for reducing Cd accumulation in rice grains. The results of this study will provide theoretical and practical guidance for the safe production of rice and for straw recycling at Cd-polluted paddy fields.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Duan GL
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Wang F
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
Cen K
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
Wang BX
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China.
Cheng WD
Jiaxing Academy of Agricultural Sciences, Jiaxing 314016, China.
Liu YC
Agricultural Bureau of Youxian County, Hunan Province, Zhuzhou 412300, China.
Zhang HM
Jiaxing Academy of Agricultural Sciences, Jiaxing 314016, China.

MeSH

AgricultureBiological AvailabilityCadmiumOryzaPlant StemsSoilSoil Pollutants

Pub Type(s)

Journal Article

Language

chi

PubMed ID

29965276

Citation

Duan, Gui-Lan, et al. "[Effects of Straw Incorporation On Cadmium Accumulation and Subcellular Distribution in Rice]." Huan Jing Ke Xue= Huanjing Kexue, vol. 38, no. 9, 2017, pp. 3927-3936.
Duan GL, Wang F, Cen K, et al. [Effects of Straw Incorporation on Cadmium Accumulation and Subcellular Distribution in Rice]. Huan Jing Ke Xue. 2017;38(9):3927-3936.
Duan, G. L., Wang, F., Cen, K., Wang, B. X., Cheng, W. D., Liu, Y. C., & Zhang, H. M. (2017). [Effects of Straw Incorporation on Cadmium Accumulation and Subcellular Distribution in Rice]. Huan Jing Ke Xue= Huanjing Kexue, 38(9), 3927-3936. https://doi.org/10.13227/j.hjkx.201703185
Duan GL, et al. [Effects of Straw Incorporation On Cadmium Accumulation and Subcellular Distribution in Rice]. Huan Jing Ke Xue. 2017 Sep 8;38(9):3927-3936. PubMed PMID: 29965276.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Effects of Straw Incorporation on Cadmium Accumulation and Subcellular Distribution in Rice]. AU - Duan,Gui-Lan, AU - Wang,Fang, AU - Cen,Kuang, AU - Wang,Bo-Xun, AU - Cheng,Wang-da, AU - Liu,Yue-Chuan, AU - Zhang,Hong-Mei, PY - 2018/7/3/entrez PY - 2018/7/3/pubmed PY - 2018/12/12/medline KW - cadmium KW - cell wall KW - rice KW - straw incorporation KW - subcellular distribution KW - translocation factor SP - 3927 EP - 3936 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 38 IS - 9 N2 - Cadmium (Cd) is classified as a Group-1 human carcinogen and rice consumption constitutes a major source of dietary intake of Cd for populations whose staple food is rice. Straw incorporation is widely performed in Cd-contaminated paddy fields, which may significantly affect the bioavailability of Cd in soil and the distribution of Cd in rice plants, consequently altering Cd accumulation in rice grains. In this study, both pot and field trials were conducted to investigate the effects of different amounts of straw incorporation (0.0%, 1.0%, 2.5%, and 5.0%) on Cd sub-cellular distribution in rice plants and Cd accumulation in rice grains. The results showed that Cd was mainly sequestered in cell wall, accounting for 86%-95% and 30%-51% of total cadmium in root and shoot cells, respectively. In shoot cells, about 35%-61% of Cd was distributed in cellular soluble fractions. When rice straw was incorporated at 1.0% and 2.5% levels, Cd sequestration in the cell wall significantly increased and Cd translocation from roots to shoots significantly decreased. However, when rice straw was incorporated at the 5% level, Cd sequestration in root cell walls significantly decreased and Cd translocation from roots to shoots significantly increased at the tillering stage. At the filling stage, 5% rice straw incorporation still significantly increased Cd sequestration in root cell walls and Cd translocation from roots to shoots did not significantly change. The rice straw and rape straw used for the field trail contained high concentrations of Cd (0.49 and 0.67 mg·kg-1, respectively). Rape straw incorporation alone or together with lime did not significantly affect Cd accumulation in brown rice or rice straw. Rice straw incorporation alone did not significantly affect Cd accumulation in brown rice or rice straw, while incorporation with lime significantly decreased Cd accumulation in both brown rice and rice straw. Biochar application can also significantly reduce Cd accumulation in rice and when biochar was added together with lime, the reduction in Cd accumulation in rice was more significant. Therefore, at Cd-contaminated paddy fields, rice straw or rape straw is not suggested to be returned directly; incorporation with lime would be better for reducing Cd accumulation in rice grains. The results of this study will provide theoretical and practical guidance for the safe production of rice and for straw recycling at Cd-polluted paddy fields. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/29965276/[Effects_of_Straw_Incorporation_on_Cadmium_Accumulation_and_Subcellular_Distribution_in_Rice]_ DB - PRIME DP - Unbound Medicine ER -