Effect of white clover mosaic virus infection on various processes relevant to symbiotic N2 fixation in red clover

1984 ◽  
Vol 62 (1) ◽  
pp. 38-43 ◽  
Author(s):  
A. H. Khadhair ◽  
R. C. Sinha ◽  
J. F. Peterson
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
White Clover ◽  
Nitrogenase Activity ◽  
Reductase Activity ◽  
Red Clover ◽  
Flower Senescence ◽  
Root Weight ◽  
White Clover Mosaic Virus ◽  
Mosaic Virus Infection

The effect of white clover mosaic virus infection on several factors relevant to symbiotic N2 fixation was determined in nodulated red clover (Trifolium pratense L.) plants at 10-leaf, preblooming, blooming, and flower-senescence stages of growth, corresponding to 3, 6, 9, and 12 weeks after virus inoculation, respectively. Virus infection caused a significant [Formula: see text] reduction of plant growth (top and root weight), nodulation (number and weight of nodules), rhizobial population, nitrogenase activity, and leghemoglobin concentration in the nodules. The presence of a high concentration of virus within nodules at all harvest times was indicated by infectivity assays. The leghemoglobin was shown to be localized in the peribacteroidal space by a cytochemical technique. A significant increase in inducible nitrate reductase activity was associated with virus infection of plants.

The effects of white clover mosaic virus infection on the yield of red clover (Trifolium pratense L.) in mixtures and in pure stands

1982 ◽  
Vol 98 (2) ◽  
pp. 455-460 ◽  
Author(s):  
S. W. Scott
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
White Clover ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Trifolium Pratense L ◽  
White Clover Mosaic Virus ◽  
Different Levels ◽  
Negative Linear Relationship ◽  
Mosaic Virus Infection

SUMMARYThe effects of white clover mosaic virus infection on the yield of two red clover varieties grown alone and in mixtures with either perennial or hybrid ryegrasses were examined. The spread of this virus within the pure clover plots was rapid. Clover drymatter yields were reduced and these losses were greater in the grass–clover mixtures than in the pure clover plots. Reductions in yield of about 70% were recorded at the first cut in mixtures of Sabtoron and Sabrina. The response of the clover to different levels of virus infection was best described by a negative linear relationship.Yields of Sabrina hybrid ryegrass increased as the levels of virus infection in the clover increased. This compensated for the losses in yield of the legume, leaving total sward yields unaffected by the virus.

The effect of white clover mosaic virus on nodulation of white clover (Trifolium repens L. cv. Ladino)

1980 ◽  
Vol 31 (2) ◽  
pp. 307 ◽  
Author(s):  
P Guy ◽  
A Gibbs ◽  
K Harrower
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
White Clover ◽  
Trifolium Repens ◽  
Effective Strain ◽  
Plant Weight ◽  
Trifolium Repens L ◽  
White Clover Mosaic Virus ◽  
Infected Nodule ◽  
Mosaic Virus Infection

White clover mosaic virus infection of Ladino clover seedlings resulted in decreased plant weight and a 71 % decrease in the number of nodules per plant without the decrease in nodule size which is usually observed when legumes are virus-infected. Nodule numbers decreased both on plants nodulated with an effective strain and on those with an ineffective strain of Rhizobium.

scholarly journals Viruses of White Clover in Pastures of Pennsylvania, New York, and Vermont

Plant Disease ◽  
1997 ◽  
Vol 81 (7) ◽  
pp. 817-820 ◽  
Author(s):  
Robert T. Sherwood
Keyword(s):  
New York ◽  
Mosaic Virus ◽  
White Clover ◽  
Significant Variation ◽  
Alfalfa Mosaic Virus ◽  
Red Clover ◽  
Yellow Mosaic Virus ◽  
Peanut Stunt Virus ◽  
Clover Yellow Mosaic Virus ◽  
White Clover Mosaic Virus

Incidence of six viruses was tested in white clover from 28 rotationally grazed pastures of Pennsylvania (PA), New York (NY), and Vermont (VT). Each of 17 PA pastures was sampled fall 1994, spring 1995, fall 1995, and spring 1996, and 10 pastures were sampled fall 1996. Each of five NY and six VT pastures was sampled spring and fall 1995 and 1996. Enzyme-linked immunosorbent assays (ELISA) were conducted for red clover vein mosaic virus (RCVMV), white clover mosaic virus (WCMV), alfalfa mosaic virus (AlMV), peanut stunt virus (PSV), clover yellow mosaic virus (CYMV), and the potyvirus group (POTY). RCVMV, WCMV, AlMV, and POTY were detected in 28, 28, 27, and 25 of the 28 pastures and in 67, 32, 30, and 7% of the 3,065 samples tested, respectively. PSV occurred at low to moderate levels in 11 PA pastures. PSV was rare in NY and was not detected in VT. CYMV was never found. Incidence of each virus varied significantly among pastures. For any given virus, there was not a significant variation in incidence among sampling dates within the NY-VT samples. RCVMV, WCMV, and POTY varied among dates within PA.

Genetics of Tolerance to White Clover Mosaic Virus in Red Clover

Crop Science ◽  
1990 ◽  
Vol 30 (6) ◽  
pp. 1191-1194 ◽  
Author(s):  
Pierre H. Martin ◽  
Bruce E. Coulman ◽  
Jean F. Peterson
Keyword(s):  
Mosaic Virus ◽  
White Clover ◽  
Red Clover ◽  
White Clover Mosaic Virus

Wheat Curl Mite Resistance: Interactions of Mite Feeding With Wheat Streak Mosaic Virus Infection

2011 ◽  
Vol 104 (4) ◽  
pp. 1406-1414 ◽  
Author(s):  
M. Murugan ◽  
P. Sotelo Cardona ◽  
P. Duraimurugan ◽  
A. E. Whitfield ◽  
D. Schneweis ◽  
...  
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
Wheat Streak Mosaic Virus ◽  
Wheat Curl Mite ◽  
Mite Feeding ◽  
Mosaic Virus Infection
Sign in / Sign up

Export Citation Format

Share Document