title: Different responses of low grain-Cd-accumulating and high grain-Cd-accumulating rice cultivars to Cd stress.
abstract: Cadmium (Cd) is a major heavy metal pollutant which is highly toxic to plants and animals. The accumulation of Cd in rice grains is a major agricultural problem in regions with Cd pollution. A hydroponics experiment using low grain-Cd-accumulating rice (xiushui 11) and high grain-Cd-accumulating rice (xiushui 110) was carried out to characterize the different responses of rice cultivars to Cd stress. We found that xiushui 11 was more tolerant to Cd than xiushui 110, and xiushui 11 suffered less oxidative damage. Cell walls played an important role in limiting the amount of Cd that entered the protoplast, especially in xiushui 11. Cd stored in organelles as soluble fractions, leading to greater physiological stress of Cd detoxification. We found that Cd can disturb the ion homeostasis in rice roots because Cd(2+) and Ca(2+) may have a similar uptake route. Xiushui 11 had a faster root-to-shoot transport of Cd, and the expression level of OsPCR1 gene which was predicted related with Cd accumulation in rice was consist with the Cd transport of root-to-shoot in rice and maintain the greater Cd tolerance of xiushui 11. These results suggest there are different Cd detoxification and accumulation mechanisms in rice cultivars.
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China. Electronic address: wfj0311@cjlu.edu.cn.
authors: Feijuan
authors: F
authors: Wang
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Min
authors: M
authors: Wang
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Zhouping
authors: Z
authors: Liu
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Yan
authors: Y
authors: Shi
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Tiqian
authors: T
authors: Han
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Yaoyao
authors: Y
authors: Ye
authors: Yiwu Product and Commodity Quality Supervision and Inspection Institute, China.
authors: Ning
authors: N
authors: Gong
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
authors: Junwei
authors: J
authors: Sun
authors: College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China. Electronic address: pzhch@cjlu.edu.cn.
authors: Cheng
authors: C
authors: Zhu
mesh_terms: D060387:Ascorbate Peroxidases / Q000378:metabolism; D002104:Cadmium / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D012275:Oryza / Q000254:growth & development / Q000378:metabolism*; D013312:Stress, Physiological; D013347:Subcellular Fractions / Q000378:metabolism
chemical_list: D002104:Cadmium; D008315:Malondialdehyde; D006861:Hydrogen Peroxide; D060387:Ascorbate Peroxidases; D002374:Catalase
keywords: Cd; Ion homeostasis; Low grain-Cd-accumulating rice; OsPCR1; Subcellular distribution