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Systematic occurrence of sterols in latex of araceae subfamily colocasioideae

, : Systematic occurrence of sterols in latex of araceae subfamily colocasioideae. American Journal of Botany 75(1): 132-137

Latex from representative New and Old World colocasioid species was analyzed by combined gas chromatography-mass spectrometry for the presence of sterols. Free sterols were detected in latex of all New World species examined, and were localized in ca. 1 .mu.m terpenoid particles which are abundant and account for the white-opaque appearance of the latex. The sterol profiles were qualitatively and/or quantitatively distinct for each of the New World species examined. No free sterols were detected in latex of Old World genera examined, which are consistently clear to cloudy, and lack terpenoid particles. The presence of free sterols as small particles is typical of New World Colocasioideae with white latex. The results of this study provide chemical evidence for distinguishing Old and New World groups of Colocasioideae, which was recently proposed based on stem vasculature, pollen, and leaf type. This is the first report of sterol-rich latex in a monocotyledon.

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Accession: 006574030

DOI: 10.2307/2443911

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Related references

Carlquist, S.S.hneider, E., 1998: Origin and nature of vessels in monocotyledons. 5. Araceae subfamily Colocasioideae. Botanical journal of the Linnean Society 128(1): 71-86

Kessler C.T.; French J.C., 1989: Molecular systematics of colocasioideae araceae. American Journal of Botany 76(6 SUPPL): 251

French, J.C.; Tomlinson, P.B,, 1983: Vascular patterns in stems of Araceae: subfamilies Colocasioideae, Aroideae and Pistioideae. The stem vasculature of 10 genera of Colocasioideae and 3 genera of Aroideae was analyzed by films of series of cross sections. The technique was unsuited for the numerous tuberous genera of Aroideae (and Pistia), which have shortened internodes....

Mayo, S.; Bogner, J., 1988: A new species of Caladium (Araceae) with notes on generic delimitation in the Colocasioideae-Caladieae. Willdenowia 8(1): 231-242

French, J.; Tomlinson, P., 1983: Vascular patterns in stems of Araceae: subfamilies Colocasioideae, Aroideae and Pistioideae Morphology. American journal of botany 70(5): 756-771

French J.C., 1986: Patterns of endothecial wall thickenings in araceae subfamilies colocasioideae aroideae and pistioideae. The pattern of wall thickenings of the endothecium of representative species form 43 genera of Colocasioideae, Aroideae, and Pistioideae was examined using clearings and macerations. All genera have a well-defined endothecium of enlarged cells wit...

Grayum M.H., 1986: New taxa of caladium chlorospatha and xanthosoma araceae colocasioideae from southern central america and northwestern colombia. Six new infrageneric taxa of Araceae, subfamily Colocasioideae, are described. Chlorospatha hammeliana is described from a restricted area of Panama, C. croatiana ssp. croatiana from Costa Rica and Panama, and Caladium lindenii (Andre) Madison var...

French J.C., 1988: Systematic occurrence of anastomosing laticifers in araceae. Results of a systematic survey of the occurrence of anastomosing, articulated lacticifers in leaves and inflorescences in 75 genera of Araceae affirm the signfiicance of lacticifers in the systematics of Araceae. Anastomosing laticifers are kimite...

Keating, Richard, C., 2004: Systematic occurrence of raphide crystals in Araceae. The presence of idioblastic cells bearing calcium oxalate raphide crystals is a defining character for Araceae. This light microscopical survey of vegetative organs, mostly leaf and petiole tissues, of 104 out of 106 recognized genera of the famil...

French J.C., 1987: Systematic occurrence of a sclerotic hypodermis in roots of araceae. A survey of the systematic occurrence of a sclerotic hypodermis was made in 91 genera and over 280 species of Araceae. The sclerotic hypodermis in roots consists of a cylinder inside the exodermis, one to five or more cells wide, with thickened, l...