Lifeng Huang

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BACKGROUND AND AIMS Chilling results in a significant decrease in Rubisco content and increased generation of reactive oxygen species (ROS) in cucumber (Cucumis sativus), a chilling-sensitive species. The role of roots in the regulation of the tolerance is unknown. Here, cucumber plants grafted onto figleaf gourd (Cucurbita ficifolia), a chilling-tolerant(More)
We investigated whether ginsenoside Rb1 (Rb1) could block tumor necrosis factor-alpha (TNF-alpha)-induced over-expression of vascular cell adhesion molecule-1 (VCAM-1) in human umbilical vein endothelial cells (HUVECs) and human lung microvascular endothelial cells (HMVECs-L). Cells were treated with various concentrations of TNF-alpha with or without Rb1(More)
The effects of chilling at 14 and 7°C on plant growth, CO2 assimilation, light allocation, photosynthetic electron flux and antioxidant metabolism were examined in cucumber (Cucumis sativus L. cv. Jinyan No. 4, CS) plants with figleaf gourd (Cucurbita ficifolia Bouché, CF) and cucumber as rootstocks, respectively. Growth inhibition by chilling at 7°C was(More)
DNA family shuffling is a powerful method for enzyme engineering, which utilizes recombination of naturally occurring functional diversity to accelerate laboratory-directed evolution. However, the use of this technique has been hindered by the scarcity of family genes with the required level of sequence identity in the genome database. We describe here a(More)
Studies on the growth and antioxidative enzyme activities of cucumber seedlings grown under low light and low temperature indicated that exposure of cucumber plants to low light at normal temperature and chilling under low light resulted in a retardation and a complete inhibition of plant growth, respectively, and their root vigor was also decreased.(More)
UDPG pyrophosphatase (UGPase) plays an important role in carbohydrate metabolism, catalyzing a reversible production of uridine diphosphate glucose (UDPG) and pyrophosphate (PPi) from Glc-1-P and UTP. UGPase gene from Aureobasidium pullulans NRRL Y-12974 was cloned, overexpressed in Escherichia coli. The recombinant UGPase possess molecular mass of 55 KDa(More)
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