The Anatomy of the Endophytic System of the Dwarf Mistletoe, Arceuthobium Campylopodum

Cohen, Leon I.

doi:10.1002/j.1537-2197.1954.tb14423.x

Cited by 24 publications

(27 citation statements)

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“…Heinricher (1924) andHeil (1923) reported an increase in the width of growth rings. A notable increase in height and width of the infected rays and their fusion end-to-end and laterally have been described by Heinricher (1924) and Cohen (1954). According to Heinricher (1924), parasitic cells formed the connections between fused rays.…”

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confidence: 91%

“…MATERIALS AND METHODS.-The material and the methods of sectioning and staining were described in the previous paper (Srivastava and Esau, 1961) In addition to sections, macerations of healthy and infected host woods were made by Jeffrey's method (Johansen, 1940, p. 104) also Cohen, 1954). In many instances, however, much of the parasite tissue is in contact with the axial tracheids ( fig.…”

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confidence: 99%

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Relation of Dwarfmistletoe (Arceuthobium) to the Xylem Tissue of Conifers. II. Effect of the Parasite on the Xylem Anatomy of the Host

Srivastava¹,

Esau²

1961

American Journal of Botany

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confidence: 99%

Relation of Dwarfmistletoe (Arceuthobium) to the Xylem Tissue of Conifers. II. Effect of the Parasite on the Xylem Anatomy of the Host

Srivastava¹,

Esau²

1961

American Journal of Botany

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“…The existence of direct xylary connections between host and parasite (Srivastava and Esau 1961) suggests that conventional water transport through transpirational pull functions in the Arceuthobium water economy (Kuijt 1969, p. 196). However, several investigators have reported that individual sinkers may have no xylem or discontinuous xylem or lack interspecific tracheary element connections (Parke 195 1 ;Cohen 1954;Kuijt 1960;Pruess 1961;Schacht 1962;Srivastava and Esau 1961).…”

Section: Introductionmentioning

confidence: 98%

The ultrastructure of dwarf mistletoe (Arceuthobium spp.) sinker cells in the region of the host secondary vasculature

Alosi¹,

Calvin²

1985

Can. J. Bot.

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ALOSI, M. C., and C. L. CALVIN. 1985. The ultrastructure of dwarf mistletoe (Arceuthobium spp.) sinker cells in the region of the host secondary vasculature. Can. J. Bot. 63: 889-898. Sinker cells showed ultrastructural similarities in three species of Arceuthobium on three different hosts despite differences in season of collection and fixation. All species had abundant osmiophilic lipid bodies, plastids with prolamellarlike bodies, mitochondria with large nucleoids, chromocentric nuclei, and peculiar saccules associated with plasmodesmatal fields. Xylem may not be continuous through sinkers. Apoplastic continuity between host and parasite is afforded by fused cellulosic cell walls. Pitlike wall thinnings and "half-plasmodesmata" are found between juxtaposed host and parasite cells. One-sided, imperforate sieve pores were noted between a sieve cell and a contiguous sinker cell. However, symplastic isolation of the host and parasite seems likely. Therefore, nutrients may be absorbed from the common host-parasite apoplast. Mobilization of nutrients out of the endophytic system to the aerial shoots is thought to be facilitated by differential starch storage in the parasite body. ALOSI, M. C., et C. L. CALVIN. 1985. The ultrastructure of dwarf mistletoe (Arceuthobium spp.) sinker cells in the region of the host secondary vasculature. Can. J. Bot. 63: 889-898.Les cellules de su~oirs de trois espkces du Arceuthobium sur trois h6tes diffkrents montrent des similaritks d'ultrastructure mCme si la saison d'kchantillonnage et la fixation sont diffkrentes. Chez toutes les espkces des corps lipidiques osmiophiles abondent, de mCme que des plastides avec des corps ressemblant a des prolamelles, des mitochondries avec de gros nuclko'ides, des noyaux chromocentriques et des saccules particuliers associks a des champs plasmodesmiques. Le xylkme peut ne pas Ctre continu a travers les su~oirs. La continuitk apoplastique entre I'h6te et le parasite est assurke par la fusion des parois cellulaires cellulosiques. Des amincissements pariktaux ressemblant a des ponctuations et des demi-plasmodesmes sont presents entre les cellules juxtaposees de I'h6te et du parasite. Des cribles unifaciaux imperforks ont ktk obsewks entre une cellule criblke et une cellule de su~oir contigue. Cependant, il semble probable qu'il y ait isolement symplastique de I'h6te et du parasite. Donc, les nutriments peuvent Ctre absorbks de I'apoplaste commun h6te-parasite. Nous croyons que la mobilisation de nutriments B l'extkrieur du systkme endophytique vers les pousses aCriennes est facilitke par le stockage differentiel d'amidon dans le corps du parasite.[Traduit par le journal]

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“…However, Cohen (1954Cohen ( , 1965 and Kuijt (1960) reported inclusions resembling starch grains in the sheath of A. campylopodum Engelm. and A. americanum Nutt.…”

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confidence: 95%

“…as having only one type of cortical strand. Cohen (1954) described inner cortical strands which bore sinkers and outer ones which did not in A. campylopodum. Here both inner and outer cortical strands bore sinkers (Fig.…”

mentioning

confidence: 96%

Penetration of western hemlock,Tsuga heterophylla, by the dwarf mistletoeArceuthobium tsugense, and development of the parasite cortical system

Hunt

Owens

Smith

1996

Canadian Journal of Plant Pathology

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The Anatomy of the Endophytic System of the Dwarf Mistletoe, Arceuthobium Campylopodum

Cited by 24 publications

References 2 publications

Relation of Dwarfmistletoe (Arceuthobium) to the Xylem Tissue of Conifers. II. Effect of the Parasite on the Xylem Anatomy of the Host

Relation of Dwarfmistletoe (Arceuthobium) to the Xylem Tissue of Conifers. II. Effect of the Parasite on the Xylem Anatomy of the Host

The ultrastructure of dwarf mistletoe (Arceuthobium spp.) sinker cells in the region of the host secondary vasculature

Penetration of western hemlock,Tsuga heterophylla, by the dwarf mistletoeArceuthobium tsugense, and development of the parasite cortical system

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