Effect of Light on Flavonoids Biosynthesis in Red Rice Rdh

The effect of light on flavonoids biosynthesis in red rice Rdh was studied. The panicles of red rice Rdh produced colorless caryopses after darkness treatment; and these colorless caryopses displayed bright-red after vanillin treatment, but did not display red color after light inducing for 15 days, suggesting that red rice Rdh could produce leucoanthocyanidin, but could not produce polyproanthocyanidins in darkness. Histological study revealed that the aleurone layers of Rdh colorless caryopses displayed bright-red after vanillin assay, but the pericarp and seed coat layers did not display color change, which indicated that the aleurone layers could accumulate precursors of polyproanthocyanidins in darkness, but the pericarp and seed coat could not. Additionally, color ofRdh caryopses changed from green in immaturity to red in maturity, and the green caryopses changed color from green to red gradually indoor for 7 days after harvest, suggesting that leucoanthocyanidins could synthesize polyproanthocyanidins. It was concluded that light was necessary for red pigment biosynthesis in red rice Rdh, leucoanthocyanidins biosyntheses in the aleurone layers did not need light, leucoanthocyanidins biosynthesis in pericarp and seed coat needed light inducing, the effect of leucoanthocyanidin biosynthesis in Rdh to light had tissue specificity.

65GHz玻璃绝缘子的研制及其电气性能测试方法

玻璃绝缘子作为模块对外接口的重要组成部分,随着我国武器装备的不断升级,使用频率越来越高,且玻璃绝缘子也越做越小。目前国内已有研究所在使用65GHz玻璃绝缘子。本文介绍了65GHz玻璃绝缘子的设计、安装及结合实际使用环境的性能测试情况,为后续该类型的元器件产品提供参考。