PDF Publication Title:
Text from PDF Page: 009
Under unilateral blue light irradiation, plant shoots tend to curve towards the light source, exhibiting positive phototropism. Roots, alternatively, generally exhibit negative phototropism, turning away from the light (Briggs and Christie 2002; Kutschera and Briggs 2012). Red-light exposure, however, leads to positive phototropism in roots, while not significantly affecting shoot curvature on its own (Kiss et al. 2002). Arabidopsis thaliana exposed to red light, before growing under blue light, experiences an enhanced phototropistic response to the blue light by shoots, and in certain ecotypes, a diminished response in roots (Millar et al. 2010; Sindelar et al. 2014). Many phototropism experiments focus on plant shoots, even though roots exhibit their own important phototropistic response. In nature, light pierces several centimeters deep into the soil, with red and far-red wavelengths traveling deeper than blue wavelength light. Root phototropism in Arabidopsis seedlings has been found to affect the architecture and growth of the roots as well as the entire plants’ metabolic rates and physiologies (Mo et al. 2015). For this reason, this study examined both root and shoots responses. These experiments attempt to further elucidate the interactive relationship between red and blue-light pathways. The findings of Sindelar et al. (2014) suggest different phototropic response among two different ecotypes of Arabidopsis. Here, phototropism and growth rates of two ecotypes (Landsberg and Columbia) are examined using both light and dark-germinated seedlings. In order to look for interactions between red and blue-light pathways, seedling growth was compared under three different unilateral light treatments: continuous blue light, a ten-minute red light pretreatment !ixPDF Image | EFFECTS OF RED LIGHT ON BLUE LIGHT-BASED PHOTOTROPISM
PDF Search Title:
EFFECTS OF RED LIGHT ON BLUE LIGHT-BASED PHOTOTROPISMOriginal File Name Searched:
red-light-phototropism.pdfDIY PDF Search: Google It | Yahoo | Bing
Cruise Ship Reviews | Luxury Resort | Jet | Yacht | and Travel Tech More Info
Cruising Review Topics and Articles More Info
Software based on Filemaker for the travel industry More Info
The Burgenstock Resort: Reviews on CruisingReview website... More Info
Resort Reviews: World Class resorts... More Info
The Riffelalp Resort: Reviews on CruisingReview website... More Info
CONTACT TEL: 608-238-6001 Email: greg@cruisingreview.com (Standard Web Page)