The Chl a Carboxylic Biosynthetic Routes: Reactions Between Mg-Protoporphyrin IX and Protochlorophyllide a - Chlorophyll Biosynthesis and Technological Applications - page 202

Fig. 7.7 Biosynthetic route 12 which is responsible for the formation of MV Mg-Proto from DV
Proto in DMV-LDV-LDMV plant Species such as Barley (Adapted from Fig. 6.4 of Chap. 6 and
from Kolossov and Rebeiz 2010 )
Metabolism of MV Mg-Proto in DMV-LDV-LDMV Plant Species
The specific role of MV Mg-Proto as a precursor of MV Pchlide a in DMV-LDV-
LDMV plant species was demonstrated by conversion of exogenous MV Mg-Proto
to MV Pchlide a in barley etiochloroplasts (Tripathy and Rebeiz 1986 ). Conversion
of MV Mg-Proto to MV Pchlide a was not accompanied by formation of DV
Pchlide a . This in turn indicates that in DMV-LDV-LDMV plant species, at the
level of MV Mg-Proto, further metabolism can only proceed via exclusive MV
biosynthetic routes Fig. 7.7 ).