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Rare-earth elements (REEs) have been used in fertilizers in the agriculture of China for about 20 years. They have been shown to be beneficial elements for plants. For example, they have improved the yield and quality for several kinds of crops. This paper reviews the current literature on studies of REEs being used as fertilizers. Some studies have focused(More)
In order to improve the plant ability to resist lead stress, effect of 0.05 mg/l La(NO3)3 on the activities of catalase (CAT), superoxide dismutase (SOD), the level of malondialdehyde (MDA) in wheat seedlings under lead stress was studied. The effect of La3+ on plant growth, chlorophyll content in wheat seedlings after adding 0, 50, 100 mg/l Pb(NO3)3 to the(More)
The wheat in hydroponics culture has been chosen as a model to study the dose-effect relationship of selenite with its growth. Five different morphological end points and 12 different biological and biochemical end points during different phases of growth of wheat seedling and seed germination have been measured and analyzed. A dose-effect relationship of(More)
The Kaschin-Beck Disease, an endemic disease in China, occurs in low-selenium areas. Using human embrionic cartilage cell as a system, the effect of selenite and another etiological factors, such as, organic matters in water, and grain from disease regions, were studied. It was shown that Se(IV), as well as superoxide dismutase, could prevent the cells from(More)
The influences of fulvic acid (FA) on bioavailability and toxicity of selenite for wheat seedling and growth were studied by green-house hydroponic experiment. The results showed that seed germination, embryo development, and growth were stimulated by selenite in the concentration range of 0.1–1.0 mg/L. In the presence of FA, the stimulation effects were(More)
The effects of selenium on the activity of peroxidase (POD) of wheat seedling and its isozyme pattern were studied using a greenhouse hydroponic experiment. The results show that the activity of POD is increased in response to higher Se concentration (approx 5.0 mg/L) in culture medium. The electrophoretic pattern of the POD isozyme was altered by growth of(More)
Telomeres are important multifunctional nucleoprotein structures located at the ends of eukaryotic chromosomes. Telomerase regulates telomere elongation, and its activity is associated with tumorigenesis. Because the activity of telomerase can be inhibited by G-quadruplex (G4) formation (a four-stranded DNA with stacks of G-quartets formed by four guanines(More)
In order to study the effects of ubiquitin-proteasome pathway (UPP) on mouse oocyte meiosis and cleavage, oocytes undergoing maturation and parthenogenetic activation and 1-cell embryos were treated with lactacystin, a specific inhibitor of proteasome. The results indicated that the rate of GVBD was not influenced by the treatment, but polar body extrusion,(More)
After Rare Earth elements (REEs) was applied into soil, content of exchangeable species decreased obviously with time lapsing. The fastest decrease of content of exchangeable species occurred at wheat tillering stage. A part of the lost content of exchangeable species was absorbed by wheat, and the other part of that was absorbed by soil. The surface(More)
The role of the ubiquitin-proteasome pathway (UPP) in mitosis is well known. However, its role in meiotic division is still poorly documented, especially in the activation of mammalian oocytes. In this study, the role of proteasome in the spontaneous and parthenogenetic activation of rat oocytes was investigated. We found that ALLN, an inhibitor of(More)