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Pigment color differs from structural color in that it is the same for all viewing angles, whereas structural color is the result of selective reflection or iridescence, usually because of multilayer structures. For example, butterfly wings typically contain structural color, although many butterflies have cells that contain pigment as well.
intro-hostory and discovery-characteristics of phytochrome-chemical nature of phytochrome-mode of action-mechanism-phytochrome mediated physiological responses-phytochrome is a pigment system:some evidences-role of phytochrome
Tomato is the second most important vegetable crop next to potato. This presentation showcases the economics behind growing Tomato in a greenhouse environment.
flowering is perhaps the most important physiological phenomenon in the life-cycle of higher plants. it is a resultant of a range of internal and external factors, that leads to the activity of a plethora of genes, that leads to the development of flowers
Year round production of chrysanthemumnirmala puli
chrysanthemum is the flower which is gaining lot of importance in India. so year round cultivation of this flower crop will fetch a good income for farmers.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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http://sandymillin.wordpress.com/iateflwebinar2024
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2. Essential Questions
• What if the sun quit shining?
• Is the process of photosynthesis dependent
on light?
• What is photosynthesis?
• What organisms undergo photosynthesis?
• How do plants make food?
• What adaptations does a leaf have to
undergo photosynthesis?
• What are the raw materials needed for
photosynthesis?
3. Essential Questions
• What are the inputs and outputs of
photosynthesis.
• How do the light dependent reactions
occur?
• How do the light independent reactions
occur?
• What is the Calvin Cycle?
• What factors affect photosynthesis?
• Why is photosynthesis important to the
environment?
4. Important Vocabulary
• chlorophyll
• Accessory pigment
• Stomata
• Guard cell
• Spongy layer
• Palisade layer
• Epidermis
• CHLOROPLAST
– GRANUM
– THYLAKOID
– STROMA
• NADP & NADPH
• Photosystem II and I
• ATP synthase
• Carbon Fixation
• Rubp
• Rubisco
• G3P
• ATP & ADP
7. The Nature of Light
• Visible light is the component
of the Electromagnetic
spectrum of energy that a
plant uses for photosynthesis.
• Photon – particle of light!
8.
9. What Colors do we see?
• Why do leaves of plants look green?
– Leaf pigments….like chlorophyll.
• Pigments can absorb, reflect, or transmit the
light energy.
• An object that absorbs all colors is BLACK.
• An object appears that color when it reflects
that color----- GREEN PLANTS!
10.
11. Photosynthetic pigments
Found in the Chloroplast.
• Chlorophyll a – absorbs less blue and more
red light. It is directly involved in
photosynthesis.
• Chlorophyll b – absorbs more blue and less
red light. It is an accessory pigment – assists
chlorophyll a.
Other accessory pigments:
• Carotenoids – absorb blue light. Reflect
yellow, red, orange light.
19. Photosynthesis – an overview
(the absolute minimum you must know!!!
• 6CO2 + 6H2O light
C6H12O6 + 6O2
• Light energy needed - Capture LIGHT - PHOTO
• ATP used and generated
• NADP+
:the electron carrier, that combines with 2 electrons
and one hydrogen ion.
• NADP+
becomes reduced into NADPH, when it receives the
electrons.
• Glucose (SYNTHESIS) and oxygen are made.
NADP : nicotinamide adenine dinucleotide phosphate
25. PHOTOSYSTEM II (PII)
• Chlorophyll pigments (purple circles) in thylakoid membrane absorb light
energy.
– The energy is absorbed by electrons…passed to ETC.
PHOTOLYSIS
• During this process, H2O is broken down, and O2 is released.
• Electrons from hydrogen replace electrons in chlorophyll.
• H+ begin to create a positive gradient in the THYLAKOID.
26. • Electrons lose energy as they pass down the ETC.
• Energy lost “pumps” more H+ into the Thylakoid thru membrane
by active transport.
PHOTOSYSTEM I
• Light energy re-energizes electrons
• Electrons combine with NADP and H+ to form NADPH – an
electron carrier
• NADPH moves into the stroma for Light Independent Rxns.
27. Production of ATP
• The concentration of H+
ions inside the thylakoid membrane
becomes much higher than the concentration outside.
• H+
ions rush out through membrane protein called ATP
synthase.
• The ATP synthase spins like a turbine and the energy is
used to bind ADP and P together to form ATP.
28. Summary of the Light
Reactions
• Input:
• Light
• Water
• ADP
• NADP+
Output:
• 18 ATP
• 12 NADPH
• Oxygen
What do you need for more light
reactions to occur?
29. Summary of the Light
Reactions
• Input:
• Light
• Water
• ADP
• NADP+
Output:
• 18 ATP
• 12 NADPH
• Oxygen
ADP, and NADP+
30. Summary of the Light
Reactions
• Input:
• Light
• Water
• ADP
• NADP+
Output:
• 18 ATP
• 12 NADPH
• Oxygen
What is the waste product of
photosynthesis?
31. Summary of the Light
Reactions
• Input:
• Light
• Water
• ADP
• NADP+
Output:
• 18 ATP
• 12 NADPH
• Oxygen
Oxygen
37. Light Independent reactions
Carbon Fixation
• 6CO2 enter the cycle and bonds
with 6 – 5 carbon molecules
(Rubp)
– Catalyzed by enzyme Rubisco.
• These molecules split into 12 – 3
carbon molecules.
38. Light Independent reactions
Reduction:
• Each 3 carbon molecule is REDUCED
by 12 NADPH (oxidized).
• 12 ATP IS NEEDED!
• Result: G3P the 3 – carbon molecule
that will become glucose.
– 2 – G3P exit the Calvin Cycle to become
Glucose
42. Calvin Cycle Reactions
• Importance of the Calvin Cycle
– G3P (glyceraldehyde-3-phosphate) can be
converted to many other molecules
• The G3P can form:
– Fatty acids and glycerol to make plant oil
– Glucose phosphate (simple sugar)
– Fructose (which with glucose = sucrose)
– Starch and cellulose
– Amino acids
46. Rate of Photosynthesis
• What is a rate?
• It is the activity per unit time.
• What factors can affect the photosynthetic rate?
• Light intensity
• Temperature
• Oxygen
• Carbon Dioxide Concentration
• Sometimes these factors are called
LIMITING FACTORS.
47. The Effect of Light Intensity on
Photosynthetic Rate