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| Name | Photoperiodism | SDP | LDP | Phytochrome | Class 12 In Urdu & Hindi |
| Video Uploader | Video From ALI ACADEMY BIOLOGY LECTURES |
| Upload Date | This Video Uploaded At 17-12-2021 13:59:19 |
| Video Discription | Hi Everyone! Welcome To My Channel "Ali Academy Biology Lectures" About This Video ........................ In This Video Lecture You Will Learn Basic Concept Of Photoperiodism Apart from photosynthesis and phototropic responses, another very important way in Photoperiod afects lowering, when shoot meristems start producing loral buds instead of leaves and lateral buds. which light exerts its inluence on living organisms is through variations in day length Later on, further studies indicated that it is really the length of the dark period which Efect of photoperiodism was irst studied in 1920 by Garner and Allard. They studied naturally lowers under same conditions, in autumn, but lowering could be induced days, but the long night is interrupted by a short light period, lowering is prevented. called photoperiod. In plants, photoperiod and temperature afect lowering, fruit and seed production, bud and seed dormancy, leaf fall and germination. and day-neutral plants lower without being inluenced by photoperiod. to classify lowering plants into long-day plants, which require long days for lowering by conditions artiicially to short days exposing. With further studies they were able is critical. Thus short-day plants are really long-night plants. If they are grown in short that tobacco plant lowers only after exposure to a series of short days. Tobacco plant Long-day plants will lower in short days if the long night period is interrupted Further experimentation also revealed that quantity of light is also inluenced by the quality of accumulates in the day and diminishes at night, short day plants coud lower only if the night were provides the plants with a means of detecting whether it is in a light or dark environment. The rate during the night it contains more phytochromes in the form of P 660. The presence of either form to P 660 conversion occurs in the dark. Thus during the day a plant has P 730 phytochromes while long enough, during which a great amount of P730 would not be completely inactivated, so that inhibit lowering in short day plants but promote lowering in long day plants. Because P 730 of P 660 to P 730. Other factors, like presence or absence of light and length of dark, or light This response to light intensity and quality led to the discovery of blue pigment that is red light wave length of 660 nm and is converted to active P 730, P 730 absorbs far red light at 730 nm and long day plants, under conditions during which lowering normally takes place. This observation led revealed that red light was efective in preventing lowering and far-red light reversed the efect of light. Cocklebur, a short day plant, will not lower if its long night is interrupted but experiments is converted to P 660. In nature, the P 660 to P 730 conversion takes place in day light and P 730 sensitive protein, the phytochromes. period also play an important role in lowering. Phytochromes seems to be responsible for the at which P 730 is converted to P 660 provides the plant with a “clock” for measuring the duration of darkness. According to this hhypothesis, p 730, converted from P 660 by the absorption of red light, would that the time measuring phenomenon of lowering is not totally controlled by the interconversion enough P 730 would remain at the end of night to promote lowering. But now it is generally agreed It has been found that red light inhibits lowering the short day plants but promotes lowering in to hypothesize that the P730-P660 interconversion might be the lant time - regulator for lowering. About This Channel..................... I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources. One-stop destination for all biology lectures. _ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial _ The videos are categories under various heading to make the students life simplified Visit My Other Channel Playlist ..................... NMDCAT PART 1: https://youtube.com/playlist?list=PLSXzOBvA_c1Mwe5KZtn9NXyHWPHvPTPG2 NMDCAT PART 2: https://youtube.com/playlist?list=PLSXzOBvA_c1MkXL0rEFZgTYI8rkpxYiZh Class 11th Lectures: https://youtube.com/playlist?list=PLSXzOBvA_c1Mwe5KZtn9NXyHWPHvPTPG2 Class 12th Lectures: https://youtube.com/playlist?list=PLSXzOBvA_c1MkXL0rEFZgTYI8rkpxYiZh Class 10th Lectures: https://youtube.com/playlist?list=PLSXzOBvA_c1PzItWzs9PNc3R-ALvCCBd1 Subscribe My Channel: https://youtube.com/c/ALIACADEMYA7R Social Link........................ Instagram: https://instagram.com/ranaalibiologist?utm_medium=copy_link |
| Category | Education |
| Tags | Photoperiodism | Photoperiodism in urdu | Photoperiodism in hindi | Photoperiodism class 12 | biology | Photoperiodism 2nd year | phytochrome | SDP | LDP | phytochrome 660 | phytochrome 730 | Reproduction | Floragen |
