Effects of different colors of light on plant growth.

The portion of photosynthesis takes place in the STROMA (clear areas of the chloroplast) and does not require light energy to proceed, but does require the products the (ATP and NADPH) of the light Rx. These are sometimes referred to as the "driving force" behind the Dark Rx. The Dark Rx is also referred to as the Calvin Cycle or the Carbon Fixation Cycle. This is where Carbon Dioxide is used in the photosynthesis process, and the CO2 provides the carbon atom which is the structural backbone of the glucose molecule.

What is the primary pigment involved with photosynthesis?

The Chloroplast as a Photosynthetic Machine.

What is the major plant pigment involved in photosynthesis?

But what about the development of land plants? Why did they stay green? The thoughts are that they had plenty of light and were not pressured to develop more efficient light gathering. That is, the light was not the limiting resource in photosynthesis for plants.

What is the primary pigment involved with photosynthesis?

Effect of different colors of light on the rate of photosynthesisThe effect of different lights on plant growth: incandescent light, fluorescent light, sunlight and black light.

Photosynthetic plant pigments have the capability to absorb certain wavelengths (colors) of light & change the light energy to chemical energy.

present in every plant that performs photosynthesis.

Some plants and plantlike organisms have developed other pigments to compensate for low light or poor use of light. Cyanobacteria and red algae have phycocyanin and allophycocyanin as accessory pigments to absorbe orange light. They also have a red pigment called phycoerythrin that absorbs green light and extends the range of photosynthesis. The red pigment is found in vegetables. Some red algae are in fact nearly black, so that increases their photosynthetic efficiency. Brown algae have the pigment fucoxanthin in addition to chlorophyll to widen their absorption range. These red and brown algae grow to depths around 270 meters where the light is less than 1% of surface light.

Pigments in Plants | Chlorophyll | Photosynthesis

Chlorophylla-a is the primary for in plants. Its structure is shown at left. It has the composition C55H72O5N4Mg. It exhibits a grass-green visual color and absorption peaks at 430nm and 662nm. It occurs in all photosynthetic organisms except photosynthetic bacteria.

The plant .They also have a red pigment called phycoerythrin that absorbs green light and extends the range of photosynthesis.

The leaf is the primary site of photosynthesis in plants.

Inner membrane represented as a series of staked membranes = GRANUM (GRANA = plural). Each GRANUM is made up of a number of individual membrane units called a THYLAKOID. The portion of photosynthesis which is called the LIGHT REACTION (LIGHT DEPENDENT Rx--requires light energy in order to occur) takes place in the Grana. (see p. 113, Fig. 7.6 in text)

formed, molded – plural plastids) is a major double for pigment synthesis and as well as proteins involved in photosynthesis and plastid.

primary photosynthetic pigments - chlorphyll ..

As the electrons in Chlorophyll a are excited and passed between the two photosystems producing ATP, these "electron holes, or "lost" electrons from Chlorophyll a within Photosystem II must be replaced. In that there is no difference between electrons and hydrogen, water will provide a ready source of hydrogen to full these "electron holes". Thus, water molecules are split ("cleaved") and a portion of the hydrogen are used to replace these "lost" electrons. The remainder of the water molecule is recombined to form oxygen--one of the products of photosynthesis, and a specific product of the light Rx.

Prove that increased leaf starch increases the process of photosynthesis in the green plantDo Photosynthesis and Growth Rate Affect Stomatal Density?

Transcript of Plant Pigments and Photosynthesis Lab

in plants is dependent upon capturing light energy in the pigment , and in particular chlorophyll a. This chlorophyll resides mostly in the and gives leaves their green color. The range of light absorption in leaves is extended by some such as the , but does not cover the entire visible range - that would make the leaves black!