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本帖最后由 nero1981 于 2012-3-23 10:57 编辑 I) {- i; \4 H8 y
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) l/ h }; |% E+ q" ^COVER Spring sun lights up signaling pathways. In plants, the UVR8 protein senses ultraviolet-B (UV-B) wavelengths in sunlight, triggering changes in growth and development, including the production of a protective chemical sunscreen. Pyramids of tryptophan rings intrinsic to UVR8 create a built-in light switch; no separate chromophore is required. Understanding how plant growth varies with changes in sunlight becomes more important as we adapt to climate change. See page 1492. Photo: iStockphoto.com) _; o9 O; i% k% I& _6 M
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发表于 2012-3-23 10:57
赞一个~~~
谢谢