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Light signaling and UV-B-mediated plant growth regulation^FA

Journal of Integrative Plant Biology 2020年第9期62卷 1270-1292页

作者： Arpita Yadav Deeksha Singh Maneesh Lingwan premachandran yadukrishnan Shyam Kumar Masakapalli Sourav Datta Department of Biological Sciences Indian Institute of Science Education and Research(IISER)BhopalBhopalMadhya Pradesh462066India School of Basic Sciences Indian Institute of Technology(IIT)MandiKamandHimachal Pradesh175005India

Light plays an important role in plants' growth and development throughout their life cycle. Plants alter their morphological features in response to light cues of varying intensity and quality. Dedicated photoreceptors help plants to perceive light signals of different wave-lengths. Activated photoreceptors stimulate the down-stream signaling cascades that lead to extensive gene expression changes responsible for physiological and developmental responses. Proteins such as ELONGATED HYPOCOTYL5 (HY5) and CONSTITUTIVELY PHOTO-MORPHOGENIC 1 (COP1) act as important factors which modulate light-regulated gene expression, especially during seedling development. These factors function as central regulatory intermediates not only in red, far-red, and blue light pathways but also in the UV-B signaling pathway. UV-B radiation makes up only a minor fraction of sunlight, yet it imparts many positive and negative effects on plant growth. Studies on UV-B perception, signaling, and response in plants has considerably surged in recent times. Plants have developed different strat-egies to use UV-B as a developmental cue as well as to withstand high doses of UV-B radiation. Plants' re-sponses to UV-B are an integration of its cross-talks with both environmental factors and phytohormones. This review outlines the current developments in light sig-naling with a major focus on UV-B-mediated plant growth regulation.

关键词： plant Plants seedling

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Superhydrophobic Surfaces Produced by Applying a Self- Assembled Monolayer to Silicon Micro/Nano-Textured Surfaces

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Nano Research 2009年第2期2卷 143-150页

作者： Yong Song Rahul premachandran Nair Min Zou Yongqiang Wang Department of Mechanical Engineering University of ArkansasFayettevilleAR 72701USA Ocean NanoTech LLC.2143 Worth LaneSpringdaleAR 72764USA

A novel way of producing superhydrophobic surfaces by applying a self-assembled monolayer(SAM)to silicon micro/nano-textured surfaces is presented in this *** micro/nano-textured surfaces on silicon substrates were generated by the aluminum-induced crystallization(AIC)of amorphous silicon(a-Si)***(OTS)SAMs were then applied to the textured surfaces by dip *** topography and wetting properties of the resulting surfaces were characterized using scanning electron microscopy(SEM)and a video-based contact angle measurement *** results show that by introducing OTS SAMs on the silicon micro/nano-textured surfaces,superhydrophobic surfaces with water contact angles(WCAs)of 155°were obtained,as compared to the WCAs of OTS-modified smooth silicon surfaces of about 112°.Surface topography was found to directly influence the WCA as predicted by the Cassie-Baxter model.

关键词： Superhydrophobic wetting property micro/nano-textured surfaces octadecyltrichlorosilane self-assembled monolayer aluminum-induced crystallization of amorphous silicon

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