1994
DOI: 10.1007/bf01321063
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In situ localisation of beet necrotic yellow vein virus (BNYVV) in rootlets of susceptible and resistant beet plants

Abstract: Mechanisms of resistance to beet necrotic yellow vein virus (BNYVV) were studied by comparing the multiplication and distribution of BNYVV in root tissue of some beet accessions. Seedlings were infected either by soil containing resting spores of Polymyxa betae with BNYVV, or by a viruliferous zoospore suspension. With both inoculation methods high virus concentrations were obtained in rootlets of the susceptible cultivar 'Regina'. Using infested soil, low virus concentrations were found in the partially resis… Show more

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Cited by 39 publications
(25 citation statements)
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“…The virus distribution observed in these tissues is in agreement with the findings of Giunchedi et al (1981) (Scholten et al, 1994). In tap roots of B. vulgaris, on the other hand, BNYVV has been reported to be essentially confined to (Guinchedi & Poggi-Pollini, 1988) or very abundant in (Kaufmann et al, 1992) xylem vessels.…”
Section: Discussionsupporting
confidence: 91%
“…The virus distribution observed in these tissues is in agreement with the findings of Giunchedi et al (1981) (Scholten et al, 1994). In tap roots of B. vulgaris, on the other hand, BNYVV has been reported to be essentially confined to (Guinchedi & Poggi-Pollini, 1988) or very abundant in (Kaufmann et al, 1992) xylem vessels.…”
Section: Discussionsupporting
confidence: 91%
“…Under natural conditions, however, the resistance of sugar beet cultivars is known to be due to restriction of virus multiplication and translocation in taproots rather than in rootlets (Scholten et al, 1994;Tamada et al, 1999). Taken together, we consider that resistance in the root and leaf operate by a similar mechanism to some extent, but that resistance appearing in leaves is remarkably stronger than that appearing in roots by vector infection.…”
Section: Discussionmentioning
confidence: 71%
“…3). However, a resistance response such as that seen in the Rizor plants has not been observed in other resistant material such as Holly1-4 plants (containing the Rz1 gene), which have much higher levels of resistance to BNYVV (Scholten et al, 1994): thus, BNYVV induced bright yellow lesions on the inoculated leaves of Holly1-4 plants, independent of the identity of the BNYVV isolates, although yellow lesions in these plants were much smaller in size than those in susceptible beet plants (T. Tamada, unpublished results). These observations suggest that the resistance mechanism to BNYVV in the Rizor source may differ from that in the Holly source.…”
Section: Discussionmentioning
confidence: 97%
See 1 more Smart Citation
“…Either the gene for resistance to BNYVV in WB42 is stronger than in Holly-l-4, or the presence or absence of minor genes for resistance to BNYVV plays an important role. Currently, mechanisms of resistance to BNYVV in WB42 and Holly-1-4 are being studied using the immunogold-silver labelling technique (Scholten et al, 1994). The presence of some susceptible plants in WB42 might have contributed to the increase of the average virus concentration in time.…”
Section: Discussionmentioning
confidence: 99%