A chemical survey of seeds of the genus Gossypium

El‐Nockrashy, A. S.; Simmons, Joseph G.; Frampton, Vernon L.

doi:10.1016/s0031-9422(00)88082-6

Cited by 16 publications

(12 citation statements)

References 17 publications

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“…Sturtia and sect. Hibiscoidea species, but El-Nockrashy et al (1969) report low but significant levels of 'total gossypol' sensu lato in the three species of sect. Sturtia and two of sect.…”

Section: Discussionmentioning

confidence: 81%

“…Bell and Stipanovic (1977) refer to the data of El-Nockrashy et al (1969) but then implicitly reject it with the statement that their data 'support Fryxell's [I9651 conclusion that seeds of Australian cottons are free of gossypol'. The aniline and p-anisidine reagents El-Nockrashy et al (1969) used are not specific for the TAs relevant here and will react with other related aldehydes . The more precise chemical analyses used here and by Bell and Stipanovic (1977) failed to detect any TAs in these species.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, the report by El-Nockrashy et al (1969) of low but significant levels of 'gossypol' sensu lato in seeds of the Australian endemics G. sturtianum, G. robinsonii, G. australe, and G. bickii contradicts expectations. These species are supposed to be 'glandless-seeded', leading most investigators to assume that TAs would also be absent (Fryxell 1965).…”

Section: Introductionmentioning

confidence: 86%

“…Consequently, the cotyledons and hypocotyls of mature embryos contain significant levels of TAs at seed maturity (Frampton et al 1960;Carter et al 1966;Lukefahr and Fryxell 1967;El-Nockrashy et al 1969). This has unfortunate consequences for cotton commercialisation.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of Terpenoid Aldehydes and Lysigenous Cavities in the 'glandless' Seeds of Australian Gossypium Species

Brubaker¹,

Benson²,

Miller³

et al. 1996

Aust. J. Bot.

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The presence of lysigenous cavities filled with terpenoid aldehydes (generically termed 'gossypol') in most tissues of cultivated cottons and their relatives imparts natural resistance to a variety of insect, fungal, and bacterial pests. Deposition of terpenoid aldehydes in cultivated cotton seed, however, renders cottonseed oils and protein meals toxic to non-ruminant animals, including humans. Seeds of the socalled 'glandless-seeded' Australian Gossypium L. species (Gossypium subgenus Sturtia (R.Br.) Tod.) reportedly lack terpenoid aldehydes, and thus may represent an important genetic resource in the development of cottonseed oils and protein meals free of these toxins. Information supporting this assertion, however, is fragmentary and contradictory. To resolve this, seeds of all known Australian Gossypium species were surveyed chemically and anatomically. Immature lysigenous cavities were present in seeds of all 18 species. Lysigenous cavities of sect. Sturtia and sect. Hibiscoidea Tod. seeds were unpigrnented and invisible to the naked eye, while pigmented, macroscopically visible lysigenous cavities occurred in all the sect. Grandicalyx (Fryxell) Fryxell seeds. HPLC (high performance liquid chromatography) analysis revealed that sect. Sturtia and sect. Hibiscoidea seeds did not contain detectable levels of terpenoid aldehydes, but that sect. Grandicalyx seeds contained gossypol.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Occurrence of Terpenoid Aldehydes and Lysigenous Cavities in the 'glandless' Seeds of Australian Gossypium Species

Brubaker¹,

Benson²,

Miller³

et al. 1996

Aust. J. Bot.

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“…Employing infrared analysis of acetone--hexane-water extracts of defatted seed meal, El-Nockrashy et al (1969), observed that G. tomentosum differed from the other two allotetraploids; this suggested to them a biphyletic origin of the allotetraploids. Our results on the other hand agree with the conclusions derived from classical techniques (geographical, morphological, cytological and genetical) and support the theory of a monophyletic or common ancestral origin of these three allotetraploids.…”

Section: Support For the Present Tkeory On The Origin Of The Tetraploidsmentioning

confidence: 99%

COMPARATIVE STUDIES OF SEED PROTEINS OF SPECIES OFGOSSYPIUMBY GEL ELECTROPHORESIS

1970

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Biochemical Changes in Cottonseed during Development and Maturity

El‐Nockrashy

Mostafa

El‐Fouly

et al. 1976

Nahrung

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The changes in cottonseed constituents at different boll ages ranging from 5 to 60 days after flowering are reported. A gradual depletion of sugars coincided with gradual formation of oil has been found. Proteins are accumulated at a more or less even rate. Gossypol starts its appearance in 10 days old boll, and continuously increases. The iodine value of the oils shows gradual increase, while the acid value continuously decreases. Continuous decrease in total saturated fatty acids during development and maturity was observed while linoleic acid continuously increases. The total phospholipid content of the oil continuously decreases. The total saturated fatty acid contents of the phospholipids are generally higher than that of their corresponding oils.

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A chemical survey of seeds of the genus Gossypium

Cited by 16 publications

References 17 publications

Occurrence of Terpenoid Aldehydes and Lysigenous Cavities in the 'glandless' Seeds of Australian Gossypium Species

Occurrence of Terpenoid Aldehydes and Lysigenous Cavities in the 'glandless' Seeds of Australian Gossypium Species

COMPARATIVE STUDIES OF SEED PROTEINS OF SPECIES OFGOSSYPIUMBY GEL ELECTROPHORESIS

Biochemical Changes in Cottonseed during Development and Maturity

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