Peculiar Histoid Enations in White Clover and their Relationships to Virus Diseases and Toxic Effects of Leafhopper Feeding

Bos, L.; Grancini, P.

doi:10.1111/j.1439-0434.1968.tb02329.x

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Neither Bos and Grancini (1968) nor the present authors succeeded in mechanically transmitting the clover enation virus. We have now tried to discover the causal agent by studying ultrathin sections of neoplastic tissues in the electron microscope to further identify the virus.…”

Section: Introductioncontrasting

confidence: 56%

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Morphology and intracellular localization of bacilliform virus particles associated with the clover enation disease

Rubio-Huertos¹,

Bos²

1969

Netherlands Journal of Plant Pathology

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In ultrathin sections of tumorous tissues of white clover plants artificially infected by grafting with the clover enation virus nuclei and nucleoli were very much enlarged. Such nuclei contained massive amounts of tubular particles in crystalline array. In spaces between the nuclear membrane lamellae such particles had an additional coat and usually occurred in irregular accumulations. These bacilliform particles measured about 200 • 80 m~z. This virus was not found in normal tissues.Two other viruses with elongated particles of 475 and 665 m~ were also observed in non-neoplastic tissues. They were easily detected in negatively stained chop preparations, rapidly transmitted by sap, and considered to be mere contaminants.Enation virus diseases are heterogeneous in epidemiology and etiology. Several have recently been found associated with dense accumulations of big spherical or polyhedral virus particles. The virus detected here closely resembles several bacilliform viruses described in recent years. These viruses are quite different in symptomatology and epidemiology.

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Section: Introductioncontrasting

confidence: 56%

“…wound tumour (Shikata et al, 1964), maize rough dwarf (Gerola and Bassi, 1966) and sugar-cane Fiji disease (Gianotti et al, 1968). Therefore, the group of virus diseases characterized by histoid tissue outgrowths as brought together by Bos and Grancini (1968) seems heterogeneous in epidemiology (type of vectors) as well as in etiology.…”

Section: Discussionmentioning

confidence: 99%

Morphology and intracellular localization of bacilliform virus particles associated with the clover enation disease

Rubio-Huertos¹,

Bos²

1969

Netherlands Journal of Plant Pathology

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“…En effet des luzernieres experimentales, sem^es dans des endroits eloignes de tout autre culture de Luzerne, montrent trois mois apres leur installation, les symptomes de la maladie a enations. On peut formuler deux hypotheses quant au m^canisme de cette infection: La transmission par Ia semence semble peu probable pour deux raisons: la premiere est que Ia maladie a enations de Ia Luzerne n'est pas transmissible mecaniquement, la seconde est due au fait que Ton observe l'apparition des 11 faut noter aussi qu'une affection similaire a ete signalee sur Trefle blanc (Trifolium repens L.) (Bos et GRANCINI 1963, 1968) en Italie. EUe se caract^rise par la formation d'enations "Peculiar Histoid Enations" a la surface inferieure de la nervure principale.…”

Section: Discussionunclassified

“…The disease seems related to "virus papillosity" of Lucerne in Romania (graft transmissible; BLATTNY 1959) and to the enation virus disease of white clover in Italy (Bos andGRANCINI 1963, 1968)…”

Section: Summary Lucerne Enation Disease a Disease New To Francementioning

confidence: 99%