Response of carbohydrate metabolism-mediated sink strength to auxin in shoot tips of apple plants

Auxin(indole-3-acetic acid, IAA) has a considerable impact on the regulation of plant carbohydrate levels and growth, but the mechanism by which it regulates sugar levels in plants has received little attention. In this study, we found that exogenous IAA altered fructose(Fru), glucose(Glc), and sucrose(Suc) concentrations in shoot tips mainly by regulating MdSUSY1, MdFRK2, MdHxK1 and MdSDH2 transcript levels. Additionally, we used 5-year-old ’Royal Gala’ apple trees to further verify that these genes play primary roles in regulating sink strength. The results showed that MdSUSY1, MdFRK2, MdHxK1/3 and MdSDH2 might be major contributors to sink strength regulation. Taken together, these results provide new insight into the regulation of the carbohydrate metabolism mechanism, which will be helpful for regulating sink strength and yield.

矿用防坠器的应用与检测检验

本文介绍了矿用防坠器的工作原理、保养维护、试验方法、安全措施、使用现状,从技术和管理两方面阐述矿用防坠器。

超临界水氧化处理三氯吡啶醇钠试验

[目的]毒死蜱合成产生的重要中间体3,5,6-三氯吡啶-2-醇钠超临界水氧化处理研究。[方法]将三氯吡啶醇钠模拟废水进行超临界水氧化处理,研究了主要影响因素反应温度、压力、过氧倍数、停留时间对处理效果的影响。[结果]TOC去除率96.57%~99.86%。[结论]随着反应温度、压力、过氧倍数提高与停留时间的延长,TOC去除率随之提高,其中反应温度、压力影响最为显著;超临界水氧化技术可快速将有机氮转化为以氨氮为主的无机氮,氨氮是超临界氧化过程中的一个相对稳定的中间产物,提高温度是去除氨氮的关键。