Regulation of secondary xylem formation in young hybrid poplars by modifying the expression levels of the PtaGLIMa gene |
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Authors: | Shaohui Yang Guiyuan Zhu Caili Wang Lincai Chen Yingjin Song Jiehua Wang |
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Affiliation: | 1.School of Environmental Science and Engineering,Tianjin University,Tianjin,China |
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Abstract: | Due to the importance of wood in many industrial applications, a tremendous amount of research has focused on the regulation of secondary xylem formation and wood properties. In this study, we performed functional analysis of PtaGLIM1a, a LIM gene that is predominantly expressed in the differentiation of secondary xylem of the hybrid poplar (Populus tremula × P. alba). With no growth retardation, transgenic poplar plants with increased and reduced expression levels of PtaGlim1a exhibited enhanced and diminished secondary growth, respectively, accompanied by a corresponding change in their lignin abundance. This study demonstrates that the wood-associated PtaGlim1a acts as a positive regulator of secondary xylem formation in poplar trees and could potentially be utilized in modifying the synthesis of plant secondary wall lignin. |
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