http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The Phytotoxic Effects of Selenium–Mercury Interactions on Root Growth in Brassica rapa (LvLing)
Zhi-Wei Bian,Jian Chen,Hui Li,Dan-Dan Liu,Li-Fei Yang,Yue-Lin Zhu,Wen-Li Zhu,Wei Liu,Zheng-Zheng Ying 한국원예학회 2016 Horticulture, Environment, and Biotechnology Vol.57 No.3
Rapid industrial and agricultural development has dramatically increased the emission of selenium (Se) and mercury (Hg) into the environment. Combined soil pollution by Se and Hg poses a potential threat to crop production. However, no toxic effects of Hg–Se interactions on plants have been reported previously. In this study, we investigated the effects of Hg–Se interactions on biochemical and physiological indices in the roots of Brassica rapa (LvLing). Seedlings were treated hydroponically with solutions of mercury chloride (1 μM), sodium selenite (4 μM), or a combination of the two. Combined Hg+Se treatment significantly inhibited root growth, reduced root biomass, and enhanced reactive oxygen species (ROS) and malondialdehyde accumulation and led to a loss of plasma membrane integrity. The combined treatment increased glutathione peroxidase, glutathione S-transferase, and peroxidase activity, reduced superoxide dismutase activity, and had no effect on catalase activity. In addition, we detected increased glutathione concentrations in root tips and reduced ascorbic acid concentrations in the presence of Hg+Se relative to individual treatments with these elements. Thus, Hg–Se interactions enhanced oxidative injury, cell death, and phytotoxicity in B. rapa roots.
Li Li,Xiu-Zhi Fan,Wei Liu,Yang Xiao,Yan Zhou,Yin-Bing Bian 한국버섯학회 2010 한국버섯학회지 Vol.8 No.4
Phenotypic traits (physiological characteristics and somatic incompatibility) and genotypic traits (target region amplification polymorphism TRAP) were used to survey the diversity in Chinese Auricularia auricula systematically, which consisted of 32 main cultivated strains. The 27 important and stable physiological indexes were evaluated; somatic incompatibility test (SIT) reaction was described from three aspects: type, pigment, and intensity while intensity clustering alone revealed the phenotypic diversity among the 32 strains;16 pairs of TRAP primer combinations produced 535 unambiguous and reproducible DNA fragments, of these 524 (97.9%) were polymorphic. The phylogenetic trees were constructed by Unweighted Pair-group Method with Arithmetic Averages (UPGMA), which distributed the test strains into four to six major groups respectively. The principal coordinate analysis (PCO) of the three methods (physiological characteristics, SIT intensity and TRAP) exhibited highly similar clustering patterns, revealing that all the test strains can be divided into three groups considered significantly correlated with geographical regions. Results revealed the occurrence of relatively low diversity of A. auricula in the study. The cultivated strains in the same region are more similar physiologically and some strains are suspected to be synonymous. This study suggests that the value for estimating diversity are represented by TRAP>SIT reaction intensity>physiological characteristics in A. auricula, and PCO analysis can provided more effective and visible information than the UPGMA clustering dendrogram. Our finding will facilitate future germplasm resources management and breeding program of A. auricula in China.