光敏色素信号是由生理活性的远红光吸收型(Pfr)所介导的,这种形式可以通过依赖于光的光转换或不依赖于光的热逆转(也称为暗逆转[dark reversion])失活到红光吸收型 (Pr)。虽然术语“暗逆转”是有历史根据的,并且经常在文献中使用,但“热逆转”更恰当地描述了不依赖于光但受温度控制的Pfr松弛过程,这种松弛过程不仅...
Differential interactions of phytochrome A (Pr vs. Pfr) with monoclonal antibodies probed by a surface plasmon resonance techniquecollagen remodelingmouse modellasersPhytochromes are red- and far-red light-reversible photoreceptors for photomorphogenesis in plants. Phytochrome A is a dimeric chromopeptide ...
Phytochromes are a collection of bilin-containing photoreceptors that regulate numerous photoresponses in plants and microorganisms through their ability to photointerconvert between a red-light-absorbing, ground state (Pr) and a far-red-light-absorbing, photoactivated state (Pfr). Although the ...
因此Pr即可吸收红光变成Pfr PlantPhotomorphogenensis Comparisonofdark-grown(etiolated)andlight-grown(de-etiolated)seedlings EtiolatedcharacteristicsDistinct"apicalhook"(dicot)orcoleoptile(monocot)De-etiolatedcharacteristicsApicalhookopensorcoleoptilesplitsopen Noleafgrowth NochlorophyllRapidstemelongation Leafgrowth...
双子叶植物顶端弯钩的打开 花诱导 节间伸长 叶分化与扩大 花色素形成 质体形成 肉质化 酶活性 PHYTOCHROME HELPS PLANTS TO AVOID SHADING BY OTHER PLANTS BY SENSING THE RATIO Pfr/Ptotal ONLY “SUN PLANTS’ EXHIBIT SHADE AVOIDANCE. “SHADE PLANTS” ARE ADAPTED TO SHADING, AND THEREFORE DO NOT ...
Phytochrome, an important photoreceptor in green plants, contains a cofactor, phytochromobilin, which shows photo-isomerization to respond as a sensor of light. The SAC-CI method was applied to the absorption spectra of several structural isomers of phytochromobilin and successfully identified the ...
This "blue shift" seems to be typical for Pfr from green lower plants.doi:10.1111/j.1751-1097.1990.tb01776.xC. FischerM. KramlJohn Wiley & Sons, Ltd.Photochemistry & PhotobiologyFischer, C. and M. Kraml ( 1990 ) Action spectrum for photoreversion of the active Pfr-fraction of Mougeotia...
Phytochromes are dimeric photoreceptors that regulate a range of responses in plants and microorganisms through interconversion of red light-absorbing (Pr) and far-red light-absorbing (Pfr) states. Photoconversion between these states is initiated by light-driven isomerization of a bilin cofactor, which...
Phytochromes are ubiquitous photoreceptors found in plants, eukaryotic algae, bacteria, and fungi. Particularly, when bacteriophytochrome is irradiated with light, a Z‐to〦 (photo)isomerization takes place in the biliverdin chromophore as part of the Pr to Pfr conversion. This photoisomerization is ...
This is similar to the behavior of phytochromes from higher plants when assembled with the same chromophore. When following the formation of the P fr state, two major processes were identified (with time constants of 3 and 18 ms) that are followed by slow reactions in the range of 166 ms ...