Salicylic Acid And Its Liquid Fertilizer On Sugar Beet Physiological And Biochemical Characteristics

Salicylic acid (SA) belongs to a group of plant phenolics widely distributed in plants and is now considered as a hormone-like substance, which plays an important role in the regulation of plant growth and development. We adapt High-Perfornance Liquid Chromatography(HPLA) and enzymes analysis method, which includes isolation, purification and colorimetry.In this paper, effects of SA and liquid fertilizer which contains lots of macroelement and microelement on the physiology and biochemistry in sugarbeet was studied. In addition, changes in endogenous hormone content and sucrose-metabolizing enzymes activities of leaf and root in sugarbeet during growth and development was studied. The results could be drawn as follows:The activities of sucrose phosphate synthase (SPS) were higher than Sucrose synthase (SS). SS mainly played the role on decomposition in leaf blade and synthesis in root.Content of 3-indoleacetic acid (IAA) and gibberellin (GA3) in leaf and content of abscisic acid (ABA) in root was higher in early period than in late period while content of IAA in root and ABA in leaf was lower in early period than in late period. Every endogenous hormone affected the plant growth together and affected each other.Treatment with spraying SA and liquid fertilizer increased the activities of SPS in root and leaf.Treatment declined the SS net activities. Treatment increased the content of 3-indoleacetic acid (IAA) and gibberellin (GA3) and declined content of abscisic acid (ABA) in root and leaf, which made for growth of root, photosynthesis and substance accumulation .It should increase bulk and sugar content of root in late period growth of sugarbeet.