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您的检索式：作者名="Bingdong Pang"
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| 1 | THE CHARACTERISTICS OF RAINFALL AND DISASTERS OF DEBRIS FLOW IN BEIJING AREA显示文摘The relationship between the characteristics of rainfall and disasters of debris flow in Beijing area is analyzed in this paper. Topographically induced convergence and upward motion of air are one of the most importam mechanism that may cause and strengthen storm rainfall in the western and northern mountain area of Beijing. Most disasters of Beijing debris flow occurred on both sides of the rainfall detention line due to the storm clouds detained by the mountains in the last decades. It is related to the topographically nocturnal storms that the debris flow often occurs during the night in Beijing. The local thermal circulation causes violent cyclonic convergence that motivates nocturnal storm rainfall in the mountain area. The rainfall intensity triggering the debris flow is the 3-day-precipitation analogous to the value at recurrence rate of once in fifty years. The storm rainfall with the intensity of 50 mm per hour may trigger debris flow, when the water content of the loose earth reaches saturation. It is found that the 3-day- rainfall over 300 mm and 1-hour-rainfall over 50 mm are the critical warning intensity of rainfall in Beijing area. | PANG Bingdong Assoc. Prof Dept. Of Basic Sciences, Beijing Insitute of Meteorology, Beijing 100081, China | 1997 | International Journal of Sediment Research1997，12，3： | 1 |
| 2 | Thymol ameliorates ammonium toxicity via repressing polyamine oxidase-derived hydrogen peroxide and modulating ammonium transporters in rice root显示文摘Background:Ammonium is an indispensable nutrient for crop growth,but anoxic conditions or inappropriate fertilizer usage result in the increase in ammonium content in soil.Excessive ammonium causes phytotoxicity.Thymol is a kind of natural phenolic compound with anti-microbial properties.However,little is known about the role of thymol in modulating plant physiology.Here we find the novel role of thymol in protecting rice from ammonium toxicity.Results:Thymol remarkably rescued rice seedlings growth from ammonium stress,which may resulted from the attenuation of reactive oxygen species(ROS)accumulation,oxidative injury,and cell death in both shoots and roots.Polyamine oxidase(PAO)metabolizes polyamines to produce ROS in plants in response to stress conditions.Thymol blocked ammonium-induced upregulation of a set of rice PAOs,which contributed to the decrease in ROS content.In rice seedlings upon ammonium stress,thymol downregulate the expression of ammonium transporters(AMT1;1 and AMT1;2);thymol upregulated the expression of calcineurin B-like interacting protein kinase 23(CIPK23)and calcineurin B-like binding protein 1(CBL1),two negative regulators of AMTs.This may help rice avoid ammonium overload in excessive ammonium environment.Correlation analysis indicated that PAOs,AMTs,and CBL1 were the targets of thymol in the detoxification of excessive ammonium.Conclusion:Thymol facilitates rice tolerance against ammonium toxicity by decreasing PAO-derived ROS and modulating ammonium transporters.Such findings may be applicable in the modulation of nutrient acquisition during crop production. | Kai Guo Guangchi An Ning Wang Bingdong Pang Zhiqi Shi Hongwu Bai Li Zhang Jian Chen Weimin Xu | 2021 | Food Production, Processing and Nutrition2021，3，1： | 0 |
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