One of the main factors that influences the growth of the plant is its environment. The effects of the environment on the plant could be positive or negative. Just like animals, plants also respond to their environment. Phototropic responses are the most common responses. Phototropic responses involve growing stems bending towards the light. The stems are phototropic as they grow towards the light. Growing the stems towards the light is obviously good as growing towards the light gives the plant greater light exposure. The growth of a plant will also be affected if another plant grows next to it. If a plant is alone, it will grow faster since it will not have any competition for light and water, but if there are two plants next to each other, they will struggle and will not grow as much as the single plant. Plant growth requires a large amount of energy, and plants get their energy from photosynthesis. Root growth determines the plant's ability to absorb needed nutrients and water. Root growth depends on leaves carrying out photosynthesis as roots depend on the energy produced during the photosynthesis process. Roots receive energy only when more energy is produced than the plant uses. Temperature also affects plant growth. Cool temperatures reduce plant growth rates more than they reduce photosynthesis, which increases the amount of carbohydrates stored in a plant. There are also many other factors that influence plant growth, but the main factors are environment and temperature. Allelopathy is the word that refers to the positive and negative effects of one plant on another. The main factor that is influenced by have one pla...... middle of paper ......as.ufl.edu/hs186>.Rayburn, Edward B. "Plant growth and development as the basis of plant management forage."West Virginia University Extension Service. West Virginia University, 1 December 1993. Web. 09 November 2013. .Brenner, E., R. Stahlberg, S. Mancuso, J. Vivanco, F. Baluška, and E. Van Volkenburgh. “Plant Behavior.” Plant signaling and behavior. University of Washington, January 1, 2006. Web. November 9, 2013. .R., Peter and Johnson G. “How Plants Grow in Response to Their Environment.” Biology. McGraw Hill, January 1, 2001. Web. November 9, 2013. Schmidt, J. “Requirements for Plant Growth.” ACES Illinois. University of Illinois, 30 April 2012. Web. 09 November. 2013. .