Influence of light intensity on chloroplast development and pigment accumulation in wild-type and etiolated mutant plants of Anthurium andraeanum ‘Sonate’

Seedlings of wild-type and etiolate mutant plants of Anthurium andraeanum cultivar ‘Sonate’ were treated for 15 d with different light intensities (20, 100, and 400 µmol·m−2·s−1) to analyze leaf plastid development and pigment content. Significant changes appeared in treated seedlings, including in leaf color, plastid ultrastructure, chloroplast development gene AaGLK expression, chlorophyll and anthocyanin contents, and protoplast shape. Wild-type and etiolated plants exhibited different plastid structures under the same light condition. The results suggest that light intensity is a crucial environmental factor influencing plastid development and leaf color formation in the A. andraeanum cultivar ‘Sonate’.

以花烛（Anthurium andraeanum）品种‘Sonate’的野生型与黄化突变体幼苗为实验材料，设置20、100、400 µmol·m⁻²·s⁻¹三种不同光照强度处理15天，以分析其叶片质体（plastid）发育与色素含量。处理后的幼苗出现多项显著变化，涉及叶色、质体超微结构、叶绿体（chloroplast）发育基因AaGLK的表达量、叶绿素（chlorophyll）与花青素（anthocyanin）含量，以及原生质体（protoplast）形态。野生型与黄化植株在相同光照条件下呈现出截然不同的质体结构。本研究结果表明，光照强度是影响花烛品种‘Sonate’质体发育与叶色形成的关键环境因子。