Phloem in Arceuthobium globosum (Viscaceae)

Our studies reveal that Arceuthobium globosum, a primitive member of the genus, has highly specialized phloem tissue. The sieve elements of this large Mexican species have transverse to oblique, usually simple sieve plates and small but numerous diffuse lateral pores. The sieve elements show the nor...

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Veröffentlicht in:	Botanical gazette (Chicago, Ill.) Ill.), 1984-12, Vol.145 (4), p.461-464
Hauptverfasser:	Calvin, C.L, Hawksworth, F.G, Knutson, D.M
Format:	Artikel
Sprache:	eng
Schlagworte:	ANATOMIA DE LA PLANTA ANATOMIE VEGETALE ARCEUTHOBIUM ARCEUTHOBIUM GLOBOSUM Biological and medical sciences Biological taxonomies Biology EVOLUCION EVOLUTION FLOEMA Fundamental and applied biological sciences. Psychology Genera Parasite hosts Parasitism and symbiosis PHLOEM PHLOEME PLANT ANATOMY Plant physiology and development Plant tissues Plants Sieve elements Sieve plates Xylem
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Beschreibung
Zusammenfassung:	Our studies reveal that Arceuthobium globosum, a primitive member of the genus, has highly specialized phloem tissue. The sieve elements of this large Mexican species have transverse to oblique, usually simple sieve plates and small but numerous diffuse lateral pores. The sieve elements show the normal pattern of callose deposition and subsequent removal reported for other dicotyledons. Sieve elements were not found in A. douglasii or A. tsugense, two specialized, temperate-region species.
ISSN:	0006-8071 1940-1205
DOI:	10.1086/337479