Search

Your search keyword '"Chai, Tuanyao"' showing total 265 results
Start Over Author "Chai, Tuanyao"
265 results on '"Chai, Tuanyao"'

37. Physiological and Gene Expression Responses of Six Annual Ryegrass Cultivars to Cobalt, Lead, and Nickel Stresses

Author

Qiao, Siyu, Tao, Ye, Shan, Qinghua, Wang, Jingang, Chai, Tuanyao, Gong, Shufang, and Qiao, Kun

Subjects
inorganic chemicals, ryegrass, QH301-705.5, Co/Pb/Ni tolerance, physiological indexes, gene expression, Article, Catalysis, Inorganic Chemistry, Gene Expression Regulation, Plant, Nickel, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Lolium, Soil Pollutants, Physical and Theoretical Chemistry, Biology (General), Molecular Biology, QD1-999, Spectroscopy, fungi, Organic Chemistry, food and beverages, Cobalt, General Medicine, Computer Science Applications, Chemistry, Biodegradation, Environmental, Lead
Abstract

Heavy metals negatively affect soil quality and crop growth. In this study, we compared the tolerance of six ryegrass cultivars to cobalt (Co2+), lead (Pb2+), and nickel (Ni2+) stresses by analyzing their physiological indexes and transcript levels of genes encoding metal transporters. Compared with the other cultivars, the cultivar Lm1 showed higher germination rates and better growth under Co2+, Pb2+, or Ni2+ treatments. After 48 h of Co2+ treatment, the total antioxidant capacity of all six ryegrass cultivars was significantly increased, especially that of Lm1. In contrast, under Pb2+ stress, total antioxidant capacity of five cultivars was significantly decreased, but that of Lm1 was unaffected at 24 h. Staining with Evans blue dye showed that the roots of Lm1 were less injured than were roots of the other five ryegrass cultivars by Co2+, Pb2+, and Ni2+. Lm1 translocated and accumulated lesser Co2+, Pb2+, and Ni2+ than other cultivars. In Lm1, genes encoding heavy metal transporters were differentially expressed between the shoots and roots in response to Co2+, Pb2+, and Ni2+. The aim of these researches could help find potential resource for phytoremediation of heavy metal contamination soil. The identified genes related to resistance will be useful targets for molecular breeding.

Published
2021

49. Estimates of soil ingestion in a population of Chinese children

Author

Lin, Chunye, Wang, Beibei, Cui, Xiaoyong, Xu, Dongqun, Cheng, Hongguang, Wang, Qin, Ma, Jin, Chai, Tuanyao, Duan, Xiaoli, Liu, Xitao, Ma, Junwei, Zhang, Xuan, and Liu, Yanzhong

Subjects
Research, Health aspects, Soil pollution -- Health aspects, Oral habits -- Health aspects, Child behavior -- Health aspects, Child health -- Research
Abstract

Introduction It is widely recognized that soil contamination in China is of serious concern (Chen et al. 2014; Larson 2014; Yang et al. 2014). Unintentional soil ingestion is a potentially [...], Background: China's soil pollution poses serious health risks. However, data regarding the soil ingestion rate (SIR) of the Chinese population, which is critical to assessing associated health risks, are lacking. Objectives: We estimated soil ingestion of 177 Chinese children from Guangdong, Hubei, and Gansu Provinces. methods: We conducted this investigation by employing a tracer mass-balance method. We collected a duplicate of all food consumed and all feces and urine excreted on 1 d (n = 153) and over 3 consecutive d (n = 24), as well as soil samples from play areas and drinking-water samples. We analyzed concentrations of the tracer elements Al, Ba, Ce, Mn, Sc, Ti, V, and Y in these samples using ICP-AES and ICP-MS and estimated the SIR for each subject. Results: The estimated SIR data based on each tracer element were characterized by a skewed distribution, as well as higher inter-tracer and intersubject variation, with several outliers. After removing the outliers, daily SIR median (range) values in milligrams per day were Al, 27.8 (-42.0 to 257.3); Ba, 36.5 (-230.3 to 412.7); Ce, 35.3 (-21.2 to 225.8); Mn, 146.6 (- 1259.4 to 1827.7); Sc, 54.8 (-4.5 to 292.0); Ti, 36.7 (- 233.7 to 687.0); V, 92.1 (10.4 to 308.0); and Y, 59.1 (- 18.4 to 283.0). Daily SIR median/95th percentile (range) values based on the best tracer method (BTM) were 51.7/216.6 (- 9.5 to 297.6) mg/d. Conclusions: Based on the BTM, recommended SIR values for the general population of Chinese children (2.5 to 12years old) are 52 mg/d for the central tendency and 217 mg/d for the upper percentile. We did not differentiate between outside soil and indoor dust. Considering the lower concentration of tracer elements in indoor dust than outside soil, actual soil and dust ingestion rates could be higher. https://doi.org/10.1289/EHP930

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results