中文摘要：

有气孔的闭合相关的肌动朊有约束力的蛋白质(痂) 家庭是植物特定的，并且它的成员都包含一个新奇肌动朊绑定领域。这里，我们报导那 SCAB3， SCAB1 的一个相当或相同的事物，绑，稳定并且绑肌动朊细丝。SCAB3 倡导者包含能由 FHY3/FAR1 抄写因素固定的 cis 元素。一致地，当植物从白光被转移到远红光时， SCAB3 的表示被导致(T 远红) 条件。scab3 异种在 T 远红的状况下面在胚轴延伸的控制显示出缺点，它可以源于肌动朊细丝的一个损害重组。一起，我们的结果建议 SCAB3 由调整肌动朊细丝动力学可能在轻条件的变化下面在植物生长起一个重要作用。

英文摘要：

The STOMATAL CLOSURE-RELATED ACTIN BINDING PROTEIN （SCAB） family is plant-specific, and its members all contain a novel actin binding domain. Here, we report that SCAB3, a homolog of SCAB 1, binds, stabilizes and bundles actin filaments. The SCAB3 promoter contains a cis-element which could be bound by the FHY3/FAR1 transcription factors. Consistently, the expression of SCAB3 is induced when plants were transferred from white light to far red light （T-Far Red） conditions. The scab3 mutants show defects in the control of hypocotyl elongation under T-Far Red condition, which may result from an impaired reorganization of actin filaments. Together, our results suggest that SCAB3 plays an important role in plant growth under changes of light conditions possibly by regulating actin filament dynamics.