The Chl b Biosynthetic Pathway:Intermediary Metabolism - Chlorophyll Biosynthesis and Technological Applications - page 301

Fig. 13.17 Biosynthesis of MV Chl b via route 1 in the Nec 7 corn mutant and in picoplanktons
(Adapted from Fig. 6.3 of Chap. 6 )
12, and 14 is destined to PSI and/or PSII inner antenna Chl-protein complexes.
It is not certain at this stage whether the MV Chl b formed via routes 12, 14 during
the very early phases of greening is convertible to MV Chl a or not as has been
reported for later stages of greening (Ito et al. 1994 , 1996 ).
13.2.2.2 Biosynthesis of DV Chlorophyll b
The occurrence of DV Chl b has not been observed in normal higher plants.
However, DV Chl b is the major Chl b that accumulates in the Nec 2 corn mutant
and in the prochlorophyte picoplankton of the subtropical waters of the North
Atlantic as well as in the picoplankton of the euphotic zone of the world tropical
and temperate oceans, and the Mediterranean sea (Chisholm et al. 1988 , 1992 ;
Goerike and Repeta 1992 ).
Conversion of DV Chl a to DV Chl b via Route 1
Conversion of DV Chl a to DV Chl b via DV Pchlide a and DV Chlide a (Fig. 13.17 )
probably takes place in the Nec 2 corn mutant and in the prochlorophyte