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《农业科学与技术(英文版)》 2017-05
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Sucrose Enhances Tyrosine-induced Inhibition of Growth in Arabidopsis Seedlings

Yuting LEI;Zhou ZHOU;Tiantian ZHI;Qi ZHU;Chunmei REN;Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization,College of Bioscience and Biotechnology,Hunan Agricultural University;College of Horticulture and Landscape,Hunan Agricultural University;  
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.
【Fund】: Supported by the Program for Key Basic Research of the Ministry of Science and Technology of China(2014CB160308);; the National Science Foundation of China(31571802)
【CateGory Index】: Q945
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