Jurnal Ilmiah Sains
Volume 12 Nomor 1, April 2012

Evolusi Fotosintesis pada Tumbuhan

Ai Nio Song (Unknown)



Article Info

Publish Date
30 Apr 2012

Abstract

EVOLUSI FOTOSINTESIS PADA TUMBUHANABSTRAK Fotosintesis adalah proses sintesis karbohidrat dari bahan-bahan anorganik (CO2 dan H2O) pada tumbuhan berpigmen dengan bantuan energi cahaya matahari. Fotosintesis terdiri atas 2 fase, yaitu fase I yang berlangsung pada grana dan menghasilkan  ATP dan NADPH2 serta fase II yang berlangsung pada stroma dan menghasilkan karbohidrat. Molekul air tidak dipecah dalam fotosintesis primitif dan setelah evolusi molekul air dipecahkan melalui 2 fotosistem sehingga O2 dilepaskan ke atmosfir. Fotosintesis berkembang menjadi lebih kompleks secara biokimia sampai terjadinya pemisahan antara respirasi dan fotosintesis beserta regulasinya. Evolusi tipe-tipe fotosintesis seperti C4 dan CAM merupakan akibat menurunnya rasio CO2/O2 dan radiasi yang intensif pada atmosfir. Kata kunci: C3, C4, CAM   THE EVOLUTION OF PHOTOSYNTHESIS IN PLANT ABSTRACT Photosynthesis is the synthesis process of carbohydrate from inorganic materials (CO2 dan H2O) in plants with pigments using light energy. There are 2 phases of photosynthesis, i.e. phase I that occurs in grana and results in ATP dan NADPH2 and phase II that occurs in stroma and results in carbohydrate. The water molecule was not split apart  in the primitive photosynthesis and after evolution the water molecule was oxidized via 2 photosystems, so that O2 was released to the atmosphere. Photosynthesis developed biochemically to be more complex until photosynthesis and its regulation was separated from respiration. The evolution of photosynthesis types, such as C4 and CAM, was resulted from the decrease of ratio CO2/O2 and the intensive radiation in the atmosphere. Keywords: C3, C4, CAM

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Journal Info

Abbrev

JIS

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Mathematics Physics

Description

Jurnal Ilmiah Sains (Journal of Scientific Sciences) is the Journals Published by Faculty of Mathematics and Natural Sciences, Sam Ratulangi University. Jurnal Ilmiah Sains Published Twice a Year, i.e April and October. Jurnal Ilmiah Sains  welcomes full research articles in the area of ...