Sucrose Enhances Tyrosine-induced Inhibition of Growth in Arabidopsis Seedlings

Tyrosine (Tyr) and sucrose (Suc) play an important role in plant growth.However,the crosstalk between Tyr and Suc in regulating the plant growth has remained unclear.In this study,it was found that Suc is able to enhance Tyr-induced inhibition of growth in Arabidopsis seedlings.Both fresh weight and root length of Arabidopsis seedlings were significantly reduced when the medium was added with high concentrations (such as 0.5 or 1.0 mM)of Tyr whereas they were clearly increased with an addition of appropriate concentrations of Suc (such as 1 or 3%) in the medium,which suggested that the growth of Arabidopsis seedlings is inhibited by high concentrations of Tyr but promoted by appropriate concentrations of Suc.Interestingly,the inhibition of growth in Arabidopsis seedlings by 0.5 or 1.0 mM Tyr was significantly intensified once 1%or 3%of Suc was added in the medium.This study revealed a positive effect of Suc on the Tyr-induced inhibition of plant growth,and the results help us to further investigate the crosstalk of Suc and Tyr in the regulation of plant growth.

Porous hybrid scaffold strategy for the realization of lightweight,highly efficient microwave absorbing materials

Exploring an advanced and efficient electromagnetic(EM) wave absorbing material by improving dielectric loss capacity and adjusting impendence matching is crucial yet challenging. Herein, the bacterial cellulose(BC) derived carbon aerogel(CA) with a robust nanofibrous network was used as a conductive loss scaffold to dissipate EM waves effectively, and the Zn O microparticles with excellent dielectric properties and low electrical conductivity were decorated on the scaffold to adjust dielectric parameters and impedance matching adequately. By using different zinc precursors, the tunable size and morphologies of Zn O crystals were obtained due to the growth rate of different crystallographic, including flowerlike, nanorod like, and cauliflower-like morphologies, which is beneficial to strong multiple reflections,intensive interfacial polarization, better impendence matching, as well as excellent maintenance of the hierarchical structure. Owing to the appropriate impendence matching and the considerable EM wave dissipation, the CA@ZnO composites achieve a superior EM absorbing performance with a broad effective absorbing bandwidth(whole X band) and a minimum reflection coefficient(-53.3 d B). This work paves a new way for developing lightweight and highly efficient EM absorbing materials comprising the carbon scaffold and semiconductor microparticles.