Phytochrome

As a group the question we posed was, how will the color of light affect the germination of the Glycine max? We first looked into how different light colors affected seed germination. Chris Thiele (grobo.io) went through how each light color affects the growth of seeds. He listed each light color and how it affected the plants. This is what he said, no exposure to ultraviolet light produces better growth. Violet light enhances the color, taste, and aroma of plants. Ble light increases the growth

Phytochrome interacting factors (PIFs), a response in which involves light signaling, and physical interaction, are the key components to signals, and coordinates plant development by responding to hormones, specifically light and gibberellin(GA) hormones.

affects on steam elongation and to measure the effect of this hormone on growth. Introduction Plant Hormones are small chemical messengers that act as internal signals within a plant. (Campbell et. at., 2011) Plant hormones are also known as Phytochromes. Plants, unlike animals, lack glands that produce and secrete hormones. Instead, each cell is capable of producing hormones (2). For over two millennia, people have observed that one part of

Cryptochromes are flavoprotein blue light receptors found throughout the biological Kingdom with many important signaling roles. Recently, it has been shown that cryptochromes catalyse the synthesis of reactive oxygen species (ROS) in the course of flavin reoxidation after blue light exposure. Although ROS are themselves important cellular regulators, it has remained unclear whether biosynthesis of ROS contributes to cryptochrome signaling. Here we show by fluorescence imaging techniques that ROS

N10/4/BIOLO/HPM/ENG/TZ0/XX 88106001 Biology HigHer level PaPer 1 Tuesday 2 November 2010 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question, choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8810-6001 17 pages © International Baccalaureate Organization 2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image

The Roles of Transcriptional Co-repressors in Plants Introduction Transcriptional repression is an important process in many biological pathways. These include development, maintaining homeostasis and regulating physiological processes. In order to control the multitude of pathways, there are a number of repressive mechanisms that are elicited by a diverse set of proteins. These proteins can be broadly classified based on their functional properties. For example, some repressors function at cis-regulatory

Abstract In 1979 Nobel prize laureate and the co-discoverer of the structure of DNA called for a precise method to gain control over specific classes of neurones “leaving the others more of less unaltered” which will allow us to understand more about the “profoundly mysterious brain.” This was the first articulated idea of optogenetics, which would lead to the development of one of the most exciting areas of neuroscience. In 2005 Karl Desseroth and Ed Boyden publishes a paper detailing a single optogenetic

This EEI is aimed to examine the response of coloured incandescent light bulbs which emitted different wavelengths of light on Tagetes erecta seedlings. The seedlings were exposed to red, orange, yellow, green and blue and sunlight The seedlings were placed in an open card board box for with the coloured light for 26 days. After the end of the growth period, the results partly agreed to the hypothesis but there were significant errors which may have led to this occurrence. It showed healthy growth

the light is vital for plant growth and it affects the height of plants indefinitely. Photoperiodism: Photoperiodism is the effect of the relative lengths of light and dark periods on plant growth. This occurs when photoreceptor proteins e.g phytochromes are produced by plants in response to light intensity or the absence of light. This in effect affects the height of plants. [5] Phototropism: Phototropism is the growth of a plant in the direction of its light source. Phototropism occurs due