OBSERVATIONS ON PHLOEM NECROSIS OF POTATO TUBERS

1944 ◽  
Vol 22c (4) ◽  
pp. 162-170 ◽  
Author(s):  
G. B. Sanford ◽  
J. G. Grimble
Keyword(s):  
Ultraviolet Light ◽  
Leaf Roll ◽  
Field Tests ◽  
Similar Type ◽  
Causal Agent ◽  
Potato Tubers ◽  
Phloem Necrosis ◽  
Net Necrosis

The results of field tests with random lots of potato tubers showing phloem necrosis of similar type are summarized. The vines from tubers of five of these developed typical leaf-roll symptoms, but those of three others showed no sign of leaf roll, or other symptoms that suggested a virus as the causal agent. The net necrosis in one of the latter samples was known to result from vine infestation of Paratrioza cockerelli Sulc, and in this case the stock returned to full vigour during the second season. It was further confirmed that once the vines show definite symptoms of leaf roll, the phloem elements of their tubers henceforth do not exhibit necrosis.The tissue contiguous to the necrotic phloem elements in the affected tubers was uniformly fluorescent, but the unaffected portion of such tubers, as well as non-necrotic tubers from positive leaf-roll plants, reacted negatively to ultraviolet light.

The relation of potato leaf roll virus net necrosis in potato tubers to the interval between planting and inoculation

1997 ◽  
Vol 16 (6) ◽  
pp. 533-539 ◽  
Author(s):  
Jutta Roosen ◽  
Ray G. Huffaker ◽  
Raymond J. Folwell ◽  
Thomas L. Marsh ◽  
Ronald C. Mittelhammer
Keyword(s):  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Potato Tubers ◽  
Potato Leaf ◽  
Net Necrosis

PHLOEM NECROSIS OF POTATO TUBERS IN RELATION TO LEAF-ROLL-FREE MYZUS PERSICAE SULC.

1950 ◽  
Vol 28c (3) ◽  
pp. 283-287 ◽  
Author(s):  
T. R. Davidson
Keyword(s):  
Myzus Persicae ◽  
Leaf Roll ◽  
Field Conditions ◽  
Potato Tubers ◽  
Phloem Necrosis

In experiments in which nonviruliferous colonies (25 to 50 individuals per plant) of Myzus persicae Sulc. were caged from 7 to 10 days on healthy potato vines growing under field conditions, the tubers failed to develop phloem necrosis. Under comparable conditions, the tubers from healthy plants caged with leaf-roll-infective colonies of this vector developed severe phloem necrosis. When planted, these tubers produced leaf-roll-infected plants.

Effect of time of inoculation with potato leafroll virus on development of net necrosis and stem-end browning in potato tubers

1982 ◽  
Vol 59 (7) ◽  
pp. 337-349 ◽  
Author(s):  
F. E. Manzer ◽  
D. C. Merriam ◽  
R. H. Storch ◽  
G. W. Simpson
Keyword(s):  
Potato Leafroll Virus ◽  
Potato Tubers ◽  
Leafroll Virus ◽  
Net Necrosis

THE ISOLATION OF A BLUE FLUORESCENT COMPOUND SCOPOLETIN, FROM GREEN MOUNTAIN POTATO TUBERS, INFECTED WITH LEAF ROLL VIRUS

1948 ◽  
Vol 26c (1) ◽  
pp. 31-34 ◽  
Author(s):  
W. A. Andreae
Keyword(s):  
Tomato Spotted Wilt Virus ◽  
Leaf Roll ◽  
First Year ◽  
Potato Tubers ◽  
Green Mountain ◽  
Fluorescent Compound ◽  
Tobacco Plants ◽  
Tomato Spotted Wilt ◽  
Wilt Virus

A method has been described for the isolation of a crystalline fluorescent compound that occurs in Green Mountain potato tubers during the first year of infection with leaf roll virus. The substance was identified as 7-hydroxy-6-methoxy 1:2 benzopyrone (scopoletin), previously isolated by Best from tobacco plants, infected with tomato spotted wilt virus.

scholarly journals Potato Tubers Freed from Leaf-roll Virus by Heat

Nature ◽  
1949 ◽  
Vol 164 (4177) ◽  
pp. 881-881 ◽  
Author(s):  
B. KASSANIS
Keyword(s):  
Leaf Roll ◽  
Potato Tubers

scholarly journals A study on the histological changes resulting from certain virus infections of the potato

1932 ◽  
Vol 111 (769) ◽  
pp. 74-85 ◽  
Keyword(s):  
Virus Infection ◽  
Leaf Roll ◽  
The Other ◽  
Detailed Account ◽  
Virus Infections ◽  
Histopathological Changes ◽  
Histological Changes ◽  
Other Hand ◽  
Phloem Necrosis ◽  
Morbid Anatomy

A degeneration of the phloem elements of the potato, which occurs in plants suffering from Leaf-roll, was first described by Quanjer (1913). Since them phloem necrosis has been recorded by many workers, some ascribing it to specific pathogenic causes while others state that it occurs in both healthy and diseased plants. Esmarch (1921) states that it is always present in the ripening plant, and v. Brehmer (1923) shows three types of necrosis, viz., Nekrobiose , Obliteration and Necrosis , of which only the last is necessarily due to virus infection. On the other hand, Artschwager (1923) found necrotic changes only in virus infected and injured plants. In this paper an attempt is made to correlate the histopathological changes occuring in virus diseased plants with the external symptoms which they exhibit. A large part of the work is devoted to the morbid anatomy of certain “Streak” diseases, for a detailed account of the external symptons of which see Salaman and Bawden (1932).

scholarly journals Potato infection with viruses in the Republic of Bashkortostan and ribonuclease activity in tubers

2021 ◽  
Vol 104 (4) ◽  
pp. 196-201
Author(s):  
R. M. Khairullin* ◽  
D. V. Garifullina ◽  
S. V. Veselova ◽  
E. A. Cherepanova ◽  
I. V. Maksimov
Keyword(s):  
Significant Positive Correlation ◽  
Leaf Roll ◽  
Climatic Conditions ◽  
Rnase Activity ◽  
Potato Tubers ◽  
Potato Leaf ◽  
Potato Viruses ◽  
Republic Of Bashkortostan ◽  
Early Maturing ◽  
The Republic

The paper presents the results of enzyme immunoassay (ELISA) of the presence of potato viruses S (PVS), M (PVM), Y (PVY), X (PVX), and Potato Leaf Roll Virus (PLRV) in tubers of various potato varieties grown in 2019 in the Republic of Bashkortostan. PVS, PVM, PVY, PVX were detected, the VSLK virus was not detected. The greatest infection with PVS, PVM, and PVX was observed in samples of tubers of early-maturing varieties. Tubers of mid-early and late-maturing varieties were more often affected by PVY than early-maturing ones, and PVX was not detected in plants of those varieties. Ribonuclease (RNase) activity in potato tubers of 14 varieties depended on the earliness of the variety, regardless of the soil and climatic conditions. A statistically significant positive correlation (P<0.05) was found between the abundance of PVS and PVM viruses and RNase activity in tubers of medium-early and late-maturing varieties, whereas, on the contrary, a negative correlation between PVM and RNase activity was revealed when analyzing tubers of early-maturing varieties. It is concluded that the prevalence of potato viruses in the territory of the Republic of Bashkortostan and the activity of RNase in tuber seedlings depend on the potato variety and the type of viruses.

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