Root Growth And Development : The Development Of Genetic Development

discuss what the cells are doing. Since these cells are in the root tip, they

However, for each quad, the fertilizer used for the control was added altogether with the fertilizers being studied. Since the only plant that presented growth was in the control quad, it becomes necessary to explore the effects of excess fertilizers, and furthermore, excess nitrogen, would have in the development of the fast plants. Although Nitrogen is one of the elements most living organisms require, some studies have showed high levels of nitrogen can cause toxic stress to some plants, to the point where growth can be inhibited. (Yu et al.

through its ability to hold energy or heat. The response earned a final point for the description of root

In general terms, explain how the basic plant life cycle with alternation of generations is modified in angiosperms.

Root development from the seed developing downwards to give more sub roots then they develop into a hair like substance it reamains connected as the stem is growing up and after that it breaks the dirt and creates takes off.

The experiments purpose was to understand and observe the gene expressions in the genes pCNT103, cig1 and GapC in the shoot, root and callus tissues of the tobacco plant, Nicotiana tabacum. Using various genetic laboratory research techniques completed the experiment. The experiment consisted of four parts. The sterile tissue culture technique was used to differentiate the tobacco callus tissue in

Like animals, plants are affected by gravity. Yet, they manage to grow upward and to great heights. How do they do this? While there are many forces acting on plants from the outside, there are also forces at work within plants themselves. These forces enable plants to stay up straight, take in water, extend their roots, and find light. Plants hold themselves up in two main ways, through turgor pressure and by using special woody tissues.

ABSTRACT — In the present investigation, it was revealed that treatment with paclobutrazol (PBZ) @ 2.5, 5.0, 10 and 20 µg mL–1 resulted in shoot length and shoot dry weight to decrease significantly under normal condition, but increased significantly in salinity (4 dSm-1 and 8 dSm-1) with respect to control. Treatment with PBZ resulted in significant increase in root length and root dry weight as compared to control under both normal (PBZ) and saline conditions. Total chlorophyll was recorded to increase significantly at vegetative and flowering stages as compared to control. Hydrogen peroxide decreased significantly at vegetative and flowering stages. Treatment with PBZ resulted in significant increase in protein and total sugar content at

Inorganic phosphate (Pi) is a key nutrient for plants and it is involved in a myriad of metabolic processes and functions that allow their growth and development. Since it is such an important nutrient its uptake, transport, storage and usage are tightly regulated. Never the less the reduced availability of Pi in the ground is a mayor limiting factor. When phosphate starvation occurs the plant has to adapt to survive. Such stress triggers a distinct phenotype in the root such as an increase in root hair length and density, as well as an increase in the ratio root/shoot and proliferation of lateral roots. The changes in root architecture are also accompanied by changes in metabolic processes such as photosynthesis, glycolysis, carbon fixation,

This chemical was found as a by-product of the fungus Gibberella fujikuroi (John M Riley, 1997). This acid was developed later and now, synthetic versions of it are available commercially. This Hormone is responsible for growth and development in the plant. Therefore, small concentrations of this plant can help a plant grow faster but too large concentrations can have the opposite effect (Triplantanol, 2011). This chemical comes in the form of a yellowish powder that is dissolved in water and given to the plant (Wikipedia, 2015).

Gibberellin Acid is a plant hormone that can affect plant growth by manipulating the cell division, stem elongation, and even mobilizes food resources within the endosperm to increase seed germination (Wiathrop, 1998). This experiment took place to test the factor of whether or not gibberellin could allow a seed to germinate and grow in the absence of light. Plants were distributed five drops of gibberellin and then placed in the cabinet for a total of three weeks. Each week, we recorded the growth of each plant. As a result of the three weeks, only one of the two hormone-induced plants successfully sprouted to a total of 16.2 centimeters. The other hormone-induced seed showed germination however, resulted to zero vertical growth,

Today I am going to do a science project / report on plant growth and what affects the plant growth and how fast it grows. For my project I will be using three different liquids such as, water, soda , water mixed with dish dergent, and salt water to see which liqud substance will make a plant grow or make it die.

Allelopathy originates from the Greek language; Allele means two sided harm, and pathy means suffering (Willis, 2010). The release of chemicals by one plant that can affect the growth of another plant is called allelopathy (Ferguson, 2003). The chemicals released from a plant which possess allelopathic influences are termed allelochemicals or allelochemics (Johnson J, 2012). Different parts of a plant can secret allelochemicals. They can also be released naturally (Cipollini, 2012). They can be found in leaves, pollens, roots, fruits, or stems (Martin, 2012). According to Heisey (1996), species can be affected by these chemicals in many different ways. The toxic chemicals may inhibit shoot or root growth, they may inhibit the uptake of food, or they may disrupt a symbiotic relationship thereby destroying the plant's usable source of a nutrient. Allelopathic plants may also have beneficial effects (Cipollini, 2012). They are used as a means of survival in nature, and decrease the competition between plants nearby. According to James J (2003), chemicals found to inhibit the growth of a species at a certain concentration may stimulate the growth of the same species or another at a lower concentration. For example, many trees use allelopathy to protect their space by using their roots to pull more water from the soil so other plants cannot thrive (Willis, 2010). In other words, some use their allelochemicals to inhibit germination or to prevent development

This data shows a strange outcome, in the hypothesis; it says that “If acid is introduced to the seed during germination, then the roots will not grow as long as the seeds that are given water”. This statement proves to be untrue, because the roots grew longer with stronger acid than weaker acid, and in some, cases, grew better with strong acid than it did in water. This may be true because of the acid growth theory. The acid growth theory states that auxins cause the elongation of stem cells by promoting wall loosening. It was determined that this wall loosening is caused by hydrogen ions. This idea and subsequent supporting data gave rise to the acid growth theory, which states that when exposed to auxins, susceptible cells excrete protons into the wall at an enhanced rate, which in turn decreases the pH in the wall. The lowered wall pH then activates the wall loosening process which is essentially doing the same thing as the auxin hormone.

Allelopathic chemicals can also exist in soil, affecting the surround plants and those planted afterwards. Studies have shown that Leucaena leucocephala, a tree promoted for water conservation and revegetation, contains a toxic amino acid in its leaves and foliage that prevents the growth of other trees but not its own seedlings. Research has also shown that this species reduces the yield of wheat and increases the yield of rice. Other allelopathic plants include mango, box elder, broccoli, and Eucalyptus.