Guangdeng Chen
Sichuan Agricultural University
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Featured researches published by Guangdeng Chen.
Environmental Science and Pollution Research | 2017
Qiang Xu; Changquan Wang; Shigui Li; Bing Li; Qiquan Li; Guangdeng Chen; Weilan Chen; Feng Wang
Strategies to reduce cadmium (Cd) in rice grain, below concentrations that represent serious human health concerns, require that the mechanisms of Cd distribution and accumulation within rice plants be established. Here, a comprehensive hydroponic experiment was performed to investigate the differences in the Cd uptake, chelation and compartmentalization between high (D83B) and low (D62B) Cd-accumulation cultivars contrasting in Cd accumulation in order to establish the roles of these processes in limiting Cd translocation from root to shoot. D83B showed 3-fold higher Cd accumulation in the shoots than the cultivar D62B. However, a short-term Cd uptake experiment showed more Cd uptake by D62B than by D83B. The distribution of Cd in roots and shoots differed significantly. D83B translocated 38% of total Cd taken up to the shoots, whereas D62B retained most of the Cd in the roots. D62B had higher amounts of non-protein thiols (NPTs) and glutathione (GSH) than D83B. The NPT and Cd distribution ratio (CDR) in the anionic form in the roots of D62B increased gradually as Cd concentration increased. In D83B, in contrast, levels of CDR in the cationic form increased significantly from 22.10 to 43.37%, while NPT only increased slightly. Furthermore, the percentage of Cd ions retained in thiol-rich peptides, especially in the HMW complexes, was significantly higher in D62B compared with D83B. However, D83B possessed a greater proportion of potentially mobile (cationic) Cd in the roots and showed superior Cd translocation from root to shoot. Taken as a whole, the results presented in this study revealed that Cd chelation, compartmentalization and adsorption contribute to the Cd retention in roots.
Functional Plant Biology | 2018
Jingyi Guo; Guangdeng Chen; Xizhou Zhang; Tingxuan Li; Haiying Yu; Chunji Liu
Barley (Hordeum vulgare L) may alter its root morphology to improve P acquisition efficiency under low-P (LP) stress. This research studied the variations in adventitious and lateral root morphological traits of barley and mapped their quantitative trait loci (QTLs) under LP and high P (HP). The recombinant inbred lines were derived from the F1 population of a cross between CN4027 and Baudin. Two experiments aimed to identify QTLs related to adventitious and lateral root morphological traits under LP and HP. The length, surface area and volume of adventitious and lateral roots were measured. Under HP, Baudin had larger root morphology, especially lateral root morphology, than CN4027. LP stress induced lateral root growth but inhibited adventitious root growth. Nineteen QTLs for root morphological traits were detected. These QTLs clustered within four regions (Cl-2H, Cl-3H, Cl-4H and Cl-7H) on chromosomes 2H, 3H, 4H and 7H, with corresponding contributions of 12.0-42.9%. Some QTLs are linked with the QTLs for P efficiency detected previously, demonstrating the role of root morphological traits in P efficiency. The Cl-2H region was identified in the interval bPb3927665-bPb3265744 on chromosome 2H and had major effects on lateral root growth, especially under LP. Lateral root length and surface area increased when alleles from Baudin were present at the QTLs in Cl-2H. This study demonstrated the patterns of growth among root types and the role of lateral roots in barleys adaption to LP stress. The QTL clusters, especially Cl-2H, may offer clues for fine mapping and map-based cloning.
Environmental Science and Pollution Research | 2015
Li Zhao; Tingxuan Li; Haiying Yu; Guangdeng Chen; Xizhou Zhang; Zicheng Zheng; Jinxing Li
Environmental Science and Pollution Research | 2015
Xiaoqing Hao; Tingxuan Li; Haiying Yu; Xizhou Zhang; Zicheng Zheng; Guangdeng Chen; Shujin Zhang; Li Zhao; Yong Pu
Ecological Engineering | 2016
Yufu Hu; Jia-Jia Peng; Shu Yuan; Xiang-Yang Shu; Shuang-Long Jiang; Qin Pu; Ke-Ya Ma; Cheng-Ming Yuan; Guangdeng Chen; Hai-Hua Xiao
Environmental Science and Pollution Research | 2017
Kun Li; Haiying Yu; Tingxuan Li; Guangdeng Chen; Fu Huang
Euphytica | 2017
Jingyi Guo; Guangdeng Chen; Xizhou Zhang; Tingxuan Li; Haiying Yu; Hua Chen
Environmental Earth Sciences | 2016
Li Zhao; Tingxuan Li; Xizhou Zhang; Guangdeng Chen; Zicheng Zheng; Haiying Yu
Ecological Engineering | 2016
Hongmei Yu; Tingxuan Li; Zicheng Zheng; Xizhou Zhang; Haiying Yu; Guangdeng Chen
Clean-soil Air Water | 2016
Li Zhao; Tingxuan Li; Xizhou Zhang; Guangdeng Chen; Zicheng Zheng; Haiying Yu