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F OT OS I   NT
      ES    I S
      An    di
     Ri z   a l
Fo t o s i n t e s i s
• Ad a l a h Su a t u Pr o s e s
  d i m a n a z a t -z a t
  a n o r g a n i k (C O 2 d a n
  H 2O ) o l e h k l o r o f i l
  d i u b a h me n j a d i z a t
  o r g a n i k (k a r b o h i d r a t
  ) d e n g a n C aa n t u a n
                  b h
  s i n a r ma t a h a r i .
                 a y a

         R e a k s i U mu m :
• Fo    t o s i n t e s
  i s    t e r j a d i
  d i
  k l   o r o p l a s
• Da    u n p a d a
  t a   n a ma n
  me    r u p a k a n
  t e   mp a t
  u t   a ma
  t e   r j a d i n y a
  f o   t o s i n t e s
  i s
Me k a n i s me
   Fo t o s i n t e s i s
Me l i b a t k a n 2 l i n t a s a n
 me t a b o l i k

• Re a k s i T e r a n     g : Ta h a p i n i
  E n e r g i Ma t a h     a r i
  d i t a n g k a p Ol     e h p i g me n
  (K l o r o f i l ) d i   u b a h me n j d i
  e n e r g i k i mi a       (A T P ) d a n
  s e n y a wa p e r i     d u k s i
  (N A D P H 2).

• Re a k s i Ge l a p : P a d a t a h a p
  i n i s e n y a w a k i mi a
Light
                    Chloroplast

                     NADP
                                  RuBP
                       ADP                        3-PGA
                       +P

        Light                            Calvin
        reactions                        cycle




                                         G3P              Cellular
                                                          respiration

                                                          Cellulosse

                                                          Starch
                                                          Other organic
                                                          compounds
Re a k s i      Te r a n g
• F OT OS I S T E M a     d a l a h
  K u mp u l a n p i g    me n d a n
  p r o t e i n y a n g
  b e r a s o s i a s i   d e n g a n
  me mb r a n t i l a     k o i d
  y a n g me ma n e n      e n e r g i
  d a r i e l e k t r o   n y a n g
  t e r e k s i t a s i
• Ca h a y a d i s e r    a p o l e h 2
  f ot os i s t e m
• Fot os i s t e m I      I :
  me n g g u n a k a n    c a h a y a
Al i r a n
• Al i r
         Enl e e e k tt rr o o n
         a     l
                 k           n
  nons i k l i k
  – Me n g g u n a k a n
    f o t o s i s t e m I   I d a n I
  –E l e k t r o n d a r    i
    f o t o s i s t e m I   I
    d i h i l a n g k a n   d a n
    d i g a n t i o l e h     e l e k t r o n
    y a n g d i d o n a s   i k a n o l e h
    a i r
  – Me n s i n t e s i s    ATP d a n
    NADPH
  –Do n a s i e l e k t     r o n
Al i r a n El e k t r o n
        N o n is l i k k ln i N k D P H ,
• Me n g h a s          a       A
 ATP, d a n o k s i g e n
Al i r a n Si k l i k
–Ha    n   y   a f o t o s i s t e m I
 y a   n   g    d i g u n a k a n
–Ha    n   y   a ATP y a n g
 d i   h   a   s i l k a n
Re a k s i       Ge l a p
Si k l u s Ca l v i n
• Si k l u s Ca l v i n
  me n g g u n a k a n A T P d a n
  NADPH u n t u k
  me n g k o n v e r s i C O 2
  me n j a d i g u l a
• Si k l u s c a l v i n
  T e r j a d i d i s t r o ma
• Ti ga t a ha p
  –F i k s a s i k a r b o n
Ta h a p
1. S e   b   u   ah i okl l ku s C O 2
                  Sm e ul
   d i   k   o   nv ea l i v di a n i
                  C r s           r
   b e   n   t   u k a n o r g a n i k n y a
   me    n   j   a d i mo l e k u l
   o r   g   a   n i k (f i x a t i o n )
   me    l   a   l u i p e n g i k a t a n k e
   g u   l   a    5C (r i b u l o s e
   b i   s   p   h o s p h a t e a t a u
   Ru    B   P   ). D i k a t a l i s a s i
   o l   e   h    e n z i m Ru BP
   c a   r   b   o x y l a s e (R u b i s c o ).
2. T i   a   p    m o l e k u l 3-p h o s p h o
K e mo s i n t e s i s
• K e mo s i s n t e s i s m e r u p a k a n
  p r o s e s p e mb e n t u k a n b a h a n
  o r g a n i k (k a r b o h d r a t ) d a r i
  z a t -z a t a n o r g a n i k
  me n g g u n a k a n e n e r g i k i mi a
  s e b a g a i s u mb e r e n e r g i .
•K e m o s i n t e s i s d i b a n t u o l e h
  m i k r o o r g a n i s m e (b a k t e r i ).

•B a k t     e r i      y a n g me mb a n t u
   p r o   s e s       k e mo s i n t e s i s ,
   d i a   n t a     r a n y a :
1. b a k    t e r     i ni t r i t :
   me n    g o k     s i d a s i a mo n i a k
   me n    j a d     i n i t r i t . Ex :
T e r i ma
 Ka s i h

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Fotosintesis

  • 1. F OT OS I NT ES I S An di Ri z a l
  • 2. Fo t o s i n t e s i s • Ad a l a h Su a t u Pr o s e s d i m a n a z a t -z a t a n o r g a n i k (C O 2 d a n H 2O ) o l e h k l o r o f i l d i u b a h me n j a d i z a t o r g a n i k (k a r b o h i d r a t ) d e n g a n C aa n t u a n b h s i n a r ma t a h a r i . a y a R e a k s i U mu m :
  • 3. • Fo t o s i n t e s i s t e r j a d i d i k l o r o p l a s • Da u n p a d a t a n a ma n me r u p a k a n t e mp a t u t a ma t e r j a d i n y a f o t o s i n t e s i s
  • 4. Me k a n i s me Fo t o s i n t e s i s Me l i b a t k a n 2 l i n t a s a n me t a b o l i k • Re a k s i T e r a n g : Ta h a p i n i E n e r g i Ma t a h a r i d i t a n g k a p Ol e h p i g me n (K l o r o f i l ) d i u b a h me n j d i e n e r g i k i mi a (A T P ) d a n s e n y a wa p e r i d u k s i (N A D P H 2). • Re a k s i Ge l a p : P a d a t a h a p i n i s e n y a w a k i mi a
  • 5. Light Chloroplast NADP RuBP ADP 3-PGA +P Light Calvin reactions cycle G3P Cellular respiration Cellulosse Starch Other organic compounds
  • 6. Re a k s i Te r a n g • F OT OS I S T E M a d a l a h K u mp u l a n p i g me n d a n p r o t e i n y a n g b e r a s o s i a s i d e n g a n me mb r a n t i l a k o i d y a n g me ma n e n e n e r g i d a r i e l e k t r o n y a n g t e r e k s i t a s i • Ca h a y a d i s e r a p o l e h 2 f ot os i s t e m • Fot os i s t e m I I : me n g g u n a k a n c a h a y a
  • 7. Al i r a n • Al i r Enl e e e k tt rr o o n a l k n nons i k l i k – Me n g g u n a k a n f o t o s i s t e m I I d a n I –E l e k t r o n d a r i f o t o s i s t e m I I d i h i l a n g k a n d a n d i g a n t i o l e h e l e k t r o n y a n g d i d o n a s i k a n o l e h a i r – Me n s i n t e s i s ATP d a n NADPH –Do n a s i e l e k t r o n
  • 8. Al i r a n El e k t r o n N o n is l i k k ln i N k D P H , • Me n g h a s a A ATP, d a n o k s i g e n
  • 9. Al i r a n Si k l i k –Ha n y a f o t o s i s t e m I y a n g d i g u n a k a n –Ha n y a ATP y a n g d i h a s i l k a n
  • 10. Re a k s i Ge l a p Si k l u s Ca l v i n • Si k l u s Ca l v i n me n g g u n a k a n A T P d a n NADPH u n t u k me n g k o n v e r s i C O 2 me n j a d i g u l a • Si k l u s c a l v i n T e r j a d i d i s t r o ma • Ti ga t a ha p –F i k s a s i k a r b o n
  • 11.
  • 12. Ta h a p 1. S e b u ah i okl l ku s C O 2 Sm e ul d i k o nv ea l i v di a n i C r s r b e n t u k a n o r g a n i k n y a me n j a d i mo l e k u l o r g a n i k (f i x a t i o n ) me l a l u i p e n g i k a t a n k e g u l a 5C (r i b u l o s e b i s p h o s p h a t e a t a u Ru B P ). D i k a t a l i s a s i o l e h e n z i m Ru BP c a r b o x y l a s e (R u b i s c o ). 2. T i a p m o l e k u l 3-p h o s p h o
  • 13. K e mo s i n t e s i s • K e mo s i s n t e s i s m e r u p a k a n p r o s e s p e mb e n t u k a n b a h a n o r g a n i k (k a r b o h d r a t ) d a r i z a t -z a t a n o r g a n i k me n g g u n a k a n e n e r g i k i mi a s e b a g a i s u mb e r e n e r g i . •K e m o s i n t e s i s d i b a n t u o l e h m i k r o o r g a n i s m e (b a k t e r i ). •B a k t e r i y a n g me mb a n t u p r o s e s k e mo s i n t e s i s , d i a n t a r a n y a : 1. b a k t e r i ni t r i t : me n g o k s i d a s i a mo n i a k me n j a d i n i t r i t . Ex :
  • 14. T e r i ma Ka s i h