Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, USA.
Plant Signal Behav. 2011 May;6(5):624-31. doi: 10.4161/psb.6.5.15084. Epub 2011 May 1.
Phytochromes regulate light- and sucrose-dependent anthocyanin synthesis and accumulation in many plants. Mesophyll-specific phyA alone has been linked to the regulation of anthocyanin accumulation in response to far-red light in Arabidopsis thaliana. However, multiple mesophyll-localized phytochromes were implicated in the photoregulation of anthocyanin accumulation in red-light conditions. Here, we report a role for mesophyll-specific phyA in blue-light-dependent regulation of anthocyanin levels and novel roles for individual phy isoforms in the regulation of anthocyanin accumulation under red illumination. These results provide new insight into spatial- and isoform-specific regulation of pigmentation by phytochromes in A. thaliana.
光敏色素调节许多植物中光和蔗糖依赖的花色素苷的合成和积累。单独的质体蓝素特异性 phyA 已被链接到拟南芥对远红光响应的花色素苷积累的调节。然而，多个质体定位的光敏色素被牵连到红光条件下花色素苷积累的光调控中。在这里，我们报告了质体蓝素特异性 phyA 在蓝光依赖的花色素苷水平调节中的作用，以及个别 phy 同工型在红光照射下花色素苷积累调节中的新作用。这些结果为拟南芥中光敏色素对色素沉着的空间和同工型特异性调节提供了新的见解。
