Abscisic Acid - KBI.pptx

An acid

1. Abscisic Acid

2. Fayyaza Puti S Layla Azzahra Nesha Fadhilah Luvena 2110422044 2110427001 2110423033

3. 01 03 05 02 04 Table of contents History and Description Main Function 2 Journal Review Chemical Structure Mechanism

4. History and Description 01 Of Absisic Acid

5. Two other groups at the same time discovered the same compound: History A group led by Philip Wareing is studying shoot dormancy in woody plants. A group led by Van Steveninck is studying the fall of flowers and fruits from lupines. Plant physiologists agree to call the compound abscisic acid.

6. History In 1963, First identified and characterized by Frederick Addicott and his colleagues. They studied the compound responsible for the fall of the fruit (cotton). Two compounds were isolated: abscisin I abscisin II. Abscisin II is currently called abscisic acid (ABA).

7. Description (ABA) is a plant hormone that regulates numerous aspects of plant growth, development, and stress responses. Abscisic acid is a single compound in plants. Initially, abscisic acid was referred to as "abscisin II" because it was thought to have a major role in fruit fall. In the near future, two other groups call it "dormin" because they think this hormone has a major role in dormancy tuna.

8. Chemical Structure 02

9. Abscisic acid is a natural compound in plants which is generally produced in leaves and consists of 15 carbons (sesquiterpenoids). Some of this carbon is synthesized via the mevalonate pathway in chloroplasts and other plastids.

10. Main Function 03

11. M aintain plants if environmental influences are not suitable Main Function R educe the rate of division and elongation at the growing point and maintain seed dormancy Triggers the loss of flowers and fruit Stimulates stomata closure when the plant lacks water Stimulates leaf loss (abscission) during the dry season

12. Mecanism ABA 04

13. Seeds will germinate when inhibited by inactivity, or by removing them or by increasing the activity of gibberellins. The seeds of some desert plants fall dormant when heavy rains slough off the seeds. Other plant seeds require light or other stimuli to trigger the breakdown of abisic acid. Comparison of the presence of gibberellins in a seed will determine whether the seed will remain dormant or germinate causing dormancy, which is beneficial for the plant if there is a change in unfavorable environmental conditions such as lack of air and temperature changes in autumn and winter climates. .

14. The process

15. Journal Review 05

16. Review Journal Title : Abscisisc Acid and Abiotic StressTolerance in Crop Plants Author : Saroj K. Sah, Kambam R.Reddy and Jiaxu Li Year : 2016 Publisher : Bangladesh Agricultural University Understanding abiotic stress tolerance in the plant has important, and broad spread implications that can not be understated. ABA is a vital hormone and acts as a central regulator of different plant stresses like drought, low temperature, and salinity. Signal transduction pathways and epigenetic modifications can be further exploited to produce better transgenic plants with improved stress tolerance without a yield penalty that can withstand adverse climatic conditions Role ABA : Seed Dormancy and Germination Modulation of Root Architecture Senescence Stomata Regulation Abiotic Stress Response ABA BIOSYNTHESIS, CATABOLISM, AND TRANSPORT

17. 9h 55m 23s Jupiter’s rotation period 333,000 The Sun’s mass compared to Earth’s 386,000 km Distance between Earth and the Moon

18. Title : Abscisisc Acid dynamics, signaling, and functions in plants Author : Saroj K. Sah, Kambam R.Reddy and Jiaxu Li Year : 2016 Publisher : Bangladesh Agricultural University Review Journal As sessile organisms, plants can not“flight” as animals do during stress, and must“fight” against stresses. Stem cells may be the“secret weapon” of plants to overcome their inability to“flight” by re‐development of tissues and organs. Finally, much effort is needed to address the signaling dilemma affecting the so‐called carbon/water trade‐offs that plants face during stress. Taken together, it is urgent to decipher the role of ABA in diverse physiological processes of plants and provide a theoretical basis addressing critical problems regarding crop production, quality, and resistance

19. Abscisic acid (ABA) functions in different stages during plant growth Jupiter Mars

20. Thanks.

21. Resources Campbell NA, Reece JB (2004). Biology, 7th Edition. Benjamin Cummings. ISBN 978-0-8053-7146-8. Lerner HR (1999). Plant Responses to Environmental Stresses: From Phytohormones to Genome Reorganization: From Phytohormones to Genome Reorganization. CRC Press. ISBN 978-0-8247-0044-7. Arteca RN (1995). Plant growth substances: principles and applications. Springer. ISBN 978-0-412-03911-9. Peter J. Davies (2005). Plant hormones: biosynthesis, signal transduction, action!. Springer. ISBN 978-1-4020-2684-3.