64
F. B. SHORLAND
position of the fatty acids may differ considerably from that of the seed
fat (224).
In making comparisons between the types and distribution of fatty
acids in different parts of the same organism, it sometimes happens
that the fatty acids concerned are present in different combinations.
Nevertheless, it is considered profitable to make comparisons in fatty
acid composition, bearing in mind the different types of combination.
In this section, owing to the rather limited information on the distribution of fatty acids in the different parts of plants by comparison
with corresponding data on animals, it is convenient to reverse the
procedure followed previously in this chapter and to deal with the plants
first.
A. VARIATIONS IN FATTY ACID COMPOSITION IN
DIFFERENT PARTS OF PLANTS
The differences in fatty acid composition between the fruit-coat and
seed fats of the same species have already been referred to. It is not
intended to cover all the literature in this field, which is dealt with by
Hilditch (3), but merely to illustrate with a few examples.
TABLE XX
COMPARISON BETWEEN THE FATTY ACID COMPOSITION (WEIGHT %)
OF FRUIT-COAT AND SEED FATS OF THE SAME SPECIES
Saturated
Unsaturated
Species
C14
Ci6
Cis Oleic Linoleic Linolenic
Fruit-coat fats
Sapium sebiferum (808)
(Euphorbiaceae)
1.5
3.4 72.1 1.6 20.4
1.0
—
Elaeis guineensis (309)
(Palmae)
—
1.2 43.0 4.4 40.2
11.2
—
Seed fats
Sapium sebiferum (310)
(Euphorbiaceae)
—
—
9
3
8
25
51
a
Elaeis guineensis (272)
(Palmae)
45.2
b 18.6
8.5 2.5 15.1
2.1
—
a Also 4% decadienoic acid.
6 Also 2.4% octanoic acid, 3.7% decanoic acid, and 1.9% arachidic acid.
The examples given in Table XX show that the seed and fruit-coat
fats from the same species not only differ markedly in their fatty acid
composition, but also in the types of fatty acids present. The seed fat
of Sapium sebiferum contains 51% linolenic acid, together with 4% of
Ci8
F. B. SHORLAND
position of the fatty acids may differ considerably from that of the seed
fat (224).
In making comparisons between the types and distribution of fatty
acids in different parts of the same organism, it sometimes happens
that the fatty acids concerned are present in different combinations.
Nevertheless, it is considered profitable to make comparisons in fatty
acid composition, bearing in mind the different types of combination.
In this section, owing to the rather limited information on the distribution of fatty acids in the different parts of plants by comparison
with corresponding data on animals, it is convenient to reverse the
procedure followed previously in this chapter and to deal with the plants
first.
A. VARIATIONS IN FATTY ACID COMPOSITION IN
DIFFERENT PARTS OF PLANTS
The differences in fatty acid composition between the fruit-coat and
seed fats of the same species have already been referred to. It is not
intended to cover all the literature in this field, which is dealt with by
Hilditch (3), but merely to illustrate with a few examples.
TABLE XX
COMPARISON BETWEEN THE FATTY ACID COMPOSITION (WEIGHT %)
OF FRUIT-COAT AND SEED FATS OF THE SAME SPECIES
Saturated
Unsaturated
Species
C14
Ci6
Cis Oleic Linoleic Linolenic
Fruit-coat fats
Sapium sebiferum (808)
(Euphorbiaceae)
1.5
3.4 72.1 1.6 20.4
1.0
—
Elaeis guineensis (309)
(Palmae)
—
1.2 43.0 4.4 40.2
11.2
—
Seed fats
Sapium sebiferum (310)
(Euphorbiaceae)
—
—
9
3
8
25
51
a
Elaeis guineensis (272)
(Palmae)
45.2
b 18.6
8.5 2.5 15.1
2.1
—
a Also 4% decadienoic acid.
6 Also 2.4% octanoic acid, 3.7% decanoic acid, and 1.9% arachidic acid.
The examples given in Table XX show that the seed and fruit-coat
fats from the same species not only differ markedly in their fatty acid
composition, but also in the types of fatty acids present. The seed fat
of Sapium sebiferum contains 51% linolenic acid, together with 4% of
Ci8