Negative phototropic response of rhizoid cells in the fern Adiantum capillus-veneris
Negative phototropic response of rhizoid cells in the fern Adiantum capillus-veneris
复制标题
DOI：
10.1007/s10265-006-0014-7
复制
发表时间：
2006-08
影响因子：
2.8
通讯作者：
H. Tsuboi;Noriyuki Suetsugu;M. Wada
中科院分区：
文献类型：
--
作者：
H. Tsuboi;Noriyuki Suetsugu;M. Wada
一般来说，陆地植物的光致反应是由蓝光诱导的，并由蓝光受体趋光素介导。然而，在许多隐花植物中，包括红光和蓝光，红光和蓝光都能有效地诱导原丝体细胞的正向光致反应。艾娜。红光对嗜光反应的影响是通过光敏色素3(Phy3)介导的，光敏色素3是光敏色素和全长光敏色素嵌合的光受体。在这里，我们报告了红光和蓝光诱导的负向光性。头状菌-性根细胞。缺失PHY3的突变体缺乏红光诱导的负向光性，表明在红光下，PHA3介导了类根细胞的负向光性，而不是调节原丝体细胞的正向光性。在根状蓝光诱导的负向光性中，PHY3突变体也部分缺失，这表明PHY3与向光性激素一起冗余地介导了蓝光反应。
In general, phototropic responses in land plants are induced by blue light and mediated by blue light receptor phototropins. In many cryptogam plants including the fernAdiantum capillus-veneris, however, red as well as blue light effectively induces a positive phototropic response in protonemal cells. InA. capillus-veneris, the red light effect on the tropistic response is mediated by phytochrome 3 (phy3), a chimeric photoreceptor of phytochrome and full-length phototropin. Here, we report red and blue light-induced negative phototropism inA. capillus-venerisrhizoid cells. Mutants deficient for phy3 lacked red light-induced negative phototropism, indicating that under red light, phy3 mediates negative phototropism in rhizoid cells, contrasting with its role in regulating positive phototropism in protonemal cells. Mutants for phy3 were also partially deficient in rhizoid blue light-induced negative phototropism, suggesting that phy3, in conjunction with phototropins, redundantly mediates the blue light response.