Leaves are always positively phototropic.

叶子总是正向光性的。

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The microorganisms employed include mainly chemical conversion bacteria , phototropic bacteria and alga .

所利用的生物体主要包括：化学转化细菌、向光性细菌和藻类。

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Relation between phytochrome action modes and possible multiple pathways for phototropic signal transduction was analyzed based on the experiment results.

根据上述研究发现探讨了植物光敏素作用模式与不同向光性反应信号转导途径之间可能存在的相互关系。

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Called the Hummer O2 (like the H2, only less toxic), this concept -- which just won the L.A. Auto Show Design Challenge -- incorporates a number of innovative, futuristic features into its oddly-shaped chassis, not the least of which is a "phototropic" body shell that contains algae-filled panels.

ENGADGET: Hummer O2 concept brings shame to the nature-terrorizing brand