Palmieri, S., P. Martiniello, and G. P. Soressi
Chlorophyll and carotene content in high
pigment and green flesh fruits.
Fruits of the hp, hp-2 and gf mutants, six days
after the turning stage, were analyzed by liquid
chromatography for chlorophyll and carotene
content in comparison with the normal (+/+)
ones.
The hp-2 fruits show the highest lycopene and β -carotene content (respectively 2 and 3 times
the normal). The chlorophyll level reaches the maximum in hp-2 and gf fruits. Possibly in these two
mutants the chlorophyll pigment is not similarly distributed in the mesocarp and exocarp of the
fruit and evolves in different ways.
Palmieri, S., P. Martiniello, and G. P. Soressi
Effect of some never ripe genes on
carotene and chlorophyll content of the
fruit.
The nor 2,
nor 3,
Nr and rin mutants affect
both the pigment synthesis and the ripening
process of the fruit. On the basis of liquid
chromatography and photometric analysis in all
mutant fruits, except nor3 , 6-8 days after
the turning stage, the lycopene synthesis appears slowed down, and the a- and B -carotene content has
not yet reached the maximum value; besides the S-carotene content seems higher than normal. The
presence of a- and B-carotene, notwithstanding the lycopene synthesis generally reduced or
completely lacking as in rin/rin fruit, leads to the hypothesis of their synthesis being independent
from the lycopene as a substrate. The provitamin A of the mutant berries, when completely ripe,
proximates the content of the test. Studies on the determination of the -carotene content are in
progress.
Parker, P. F. A survey of low temperature
germination.
A total of 110 cultivars were tested over a
range of temperatures from 10°C to 25°C, using
two replicates at each temperature. Li-
mited cabinet space necessitated sequential sowings using an outdoor cultivar 'First-in-the-Field'
(A. 5102 Asmer Seeds Limited).
The table gives those cultivars that performed best in relation to the control. Anovar of the
control for the two characteristics 'days from sowing to germination' and 'duration of
germination' showed significant differences between sowings; for this reason the figures for the
control are included with each experiment.
Further studies relating to repeatability both within and between accessions, selection for, and
genetic analysis of the L.T.G. characteristic are in progress.
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