RED DROP AND EMERSON'S EFFECT.pptx

Red drop & Emerson's effect

1. WELCOME TO ALL OF YOU FOR TODAY’S PRESENTATION BACHELORS OF SCIENCE 3 RD YEAR SUBJECT: BOTANY TOPIC : RED DROP & EMERSON’S EFFECT,CONCEPTS OF TWO PHOTOSYSTEMS CREATED AND PRESENTED BY : ATIF ALI ZAKIR

2. ABSORPTION SPECTRUM & ACTION SPECTRUM ONLY VISIBLE LIGHTS TAKE PART IN THE PHOTOSYNTHESIS CHLOROPLAST PIGMENTS ABSORBS LIGHT OF CERTAIN SPECIFIC WAVELENGTH THE AMOUNT OF ABSORPTION OF DIFFERENT WAVELENGTH OF LIGHT BY A PARTICULAR PIGMENT IS CALLED AS ABSORPTION SPECTRUM OF THAT PIGMENT CHLOROPHYLL-A ABSORBS MAXIMUM IN THE BLUE AND RED REGIONS OF THE LIGHT SPECTRUM THE EEFECTIVENESS OF DIFFERENT WAVELENGTHS OF LIIGHT UTILIZED IN THE ACTION OF A PROCESS IS CALLED AS ACTION SPECTRUM,IN CASE OF PHOTOSYNTHESIS ,IT IS UTILIZED IN CO2 FIXATION O2 PRODUCTION & NADP REDUCTION THEREFORE IT IS CALLED AS THE ACTION SPECTRUM OF PHOTOSYNTHESIS

3. ACTION SPECTRUM & ABSORPTION SPECTRUM

4. RED DROP AND EMERSON’S EFFECT IT GIVES AN IDEA ABOUT THE RATE OF PHOTOSYNTHESIS AT DIFFERENT WAVELENGTHS QUANTUM YEILD : AMOUNT OF OXYGEN RELEASED PER QUANTUM OF LIGHT ABSORBED RED DROP : A SUDDEN DECLINE IN THE RAT OF PHOTOSYNTHESIS AFTER 68Onm P.S. at 700nm= 10 Q.Y ( indivivually ) P.S at 653nm= 52-53 Q.Y ( indivivually ) P.S at 700 & 653nm= 72 Q.Y (Together) EMERSON’S ENHANCEMENT EFFECT HERE THEY CONCLUDED THAT IT IS BECAUSE THAT THERE ARE TWO PHOTOSYSTEMS WHICH ARE WORKING DURING PHOTOSYNTHESIS A.PSI-700 B.PSII-680

5. RED DROP AND EMERSON’S EFFECT

6. CONCEPT OF PHOTOSYSTEMS

7. PHOTOSYNTHETIC PIGMENTS PIGMENT SYSTEM I (PSI) PIGMENT SYSTEM II ( PSII) IT IS MADE UP OF 200 -400 CHOLOROPHYLL –A MOLECULES & 50 CAROTENOIDS MOLECULES CHLOROPHYLL-B MOLECULES IS LESS ITS REACTION CENTRE IS P700 IT IS LOCATED ON THE OUTER SURFACE OF THYLAKOID IN THIS SYSTEM ,MOLECULAR O2 IS NOT EVOLVED IT PARTICIPATE IN BOTH CYCLIC AND NON CYCLIC PHOTOPHOSPHORYLATION IT IS MADE UP OF 200 CHOLOROPHYLL MOLECULES ,50 CAROTENOIDS MOLECULES CHLOROPHYLL-B MOLECULES IS MORE ITS REACTION CENTER IS P680 IT IS LOCATED ON THE INNER SURFACE OF THYLAKOID IN THIS SYSTEM , MOLECULAR O2 IS EVOLVED DUE TO THE BREAKDOWN OF WATER IT PARTICIPATES ONLY IN NON CYCLIC PHOTOPHOSPHORYLATION IT GIVES ELECTRON TO PS-I WHEN NADP IS REDUCED TO NADPH + H IN PS-I

8. PHOTOSYSTEMS-I AND II

9. THANK YOU SO MUCH FOR ATTENDING TODAY’S PRESENTATION CREATED AND PRESENTED BY ATIF ALI ZAKIR STUDENT OF MSC BOTANY II YEAR SAFIA SCIENCE COLLEGE BHOPAL U CAN FIND ME ON INSTAGRAM : @ atif_ali_zakir