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Functional Analysis of LAZY1 in Arabidopsis thaliana and Prunus Trees

机译:LAZY1在拟南芥和李树中的功能分析

摘要

Technology to optimize plant architecture is critical for future efforts to increase planting density in a wide range of crops. Little is known regarding the molecular mechanisms governing this basic plant developmental feature, particularly in fruit trees. Recently, a pair of distantly related genes called LAZY1 and TILLER ANGLE CONTROL 1 (TAC1) was shown to have opposing effects on lateral branch angle in monocots and dicots. We have characterized the LAZY1 gene in both Arabidopsis and plum (Prunus domestica) and assessed its functional relationship with TAC1. Both lazy1 and tac1:lazy1 Arabidopsis plants showed a previously unreported weeping phenotype. Transgenic plum lines silenced for LAZY1 showed horizontal branch angles, sometimes marked by rootward lateral branch growth. Our results establish that manipulation of LAZY1 gene function results in changes in tree shape and can be used to engineer fruit or ornamental trees with desired branch angles.
机译:优化植物结构的技术对于未来增加多种作物的种植密度至关重要。关于控制这种基本植物发育特征的分子机制知之甚少,尤其是在果树中。最近,有一对远距离相关的基因,称为LAZY1和TILLER ANGLE CONTROL 1(TAC1),对单子叶植物和双子叶植物的侧枝角有相反的影响。我们已经在拟南芥和李子( Prunus domestica )中鉴定了LAZY1基因,并评估了其与TAC1的功能关系。 lazy1和tac1:lazy1 拟南芥植物均显示了以前未报告的哭泣表型。对LAZY1沉默的转基因李子线显示水平分支角,有时以侧向根分支生长为特征。我们的结果表明,对LAZY1基因功能的操纵可导致树形变化,并可用于工程化具有所需分支角度的果树或观赏树。

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