Wheat 14-3-3 Protein Conferring Growth Retardation in Arabidopsis |
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Authors: | Jing LI Su-sheng SONG Yu-sheng ZHAO Wei-wei GUO Guang-hui GUO Hui-ru PENG Zhong-fu NI Qi-xin SUN Ying-yin YAO |
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Institution: | 1. State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization, Minstry of Education/Key Laboratory of Crop Genomics and Genetic Improvement, Minstry of Agriculture/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, P.R. China;2. School of Life Sciences, Tsinghua University, Beijing 100084, P.R. China |
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Abstract: | 14-3-3 proteins belong to a family of phosphoserine/threonine-binding modules and participate in a wide array of signal transduction and regulatory events. Our previous study demonstrated that Ta14-3-3 was significantly down-regulated in leaf and root tissues of hybrid wheat at the tillering stage. In this paper, three homoeologous Ta14-3-3 genes were cloned from common wheat (Triticum aestivum L., 2n=6x=42, AABBDD) and mapped on chromosomes 2A, 2B, and 2D, respectively. Transgenic Arabidopsis plants ectopically overexpressing Ta14-3-3 displayed shorter primary roots, delayed flowering and retarded growth rates, indicating that Ta14-3-3 acted as a growth inhibitor in Arabidopsis. In wheat, Ta14-3-3 was down-regulated in roots and leaves of hybrids as compared to their parental lines. We proposed that Ta14-3-3 proteins might regulate growth vigor in hybrid wheat. |
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