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Fig. 13.3 MV Chlide
b
biosynthesis via route 4 in DDV-LDV-LDDV plant species (Adapted
MV Pchlide
a
and MV Pchlide
b
. The first traces of MV Pchlide
b
in greening
etiolated cucumber cotyledons are detected after 14 h of greening (Ioannides
1993
).
In photoperiodically grown green seedlings, higher amounts of MV Pchlide
b
are
detected (Ioannides et al.
1997
; Kolossov and Rebeiz
2003
). To ascertain the
operation of biosynthetic route 9, in DDV-LDV-LDMV plants, precursor product
relationships between MV Pchlide
a
and MV Pchlide
b
and between MV Pchlide
b
and MV Chlide
b
need to be established (Fig.
13.5
).
Possible Formation of MV Chlide b from MV Pchlide b in Green
DMV-LDV-LDMV Plants via Biosynthetic Route 11
The operation of this hypothetical route is suggested by (a) the formation of MV
Pchlide
b
in green photoperiodically-grown barley (Kolossov and Rebeiz
2003
),
and wheat seedlings (Rebeiz, unpublished), (b) the structural relationship between
MV Pchlide
a
andMV Pchlide
b
, and (c) the reported photoconversion of MV Pchlide
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