Reference Report for SoyBase8101932
| Title: | Influence of the amount of blackgram mottle virus in different tissues on transmission through the seeds of Vigna mungo |
| Authors: | Varma, A., Krishnareddy, M., Malathi, V.G. |
| Source: | Plant Pathol. 1992, 41(3):274-281 |
| Abstract: | Blackgram mottle virus (BMoV) was transmitted via up to 16% of seeds of different cultivars of blackgram, as determined by seedling symptom tests. The percentage of seed infection by BMoV as determined by ELISA was even higher. Seed transmission was highest in cv. PLU-277 (15.9%), followed by cvs T-9 (11.8%), PLU-213 (7.0%) and UH-81-7 (1.3%). Seed transmission was correlated with the amount of virus present in the embryonic axis and later in primary leaves. The presence of virus in the testa alone did not result in its transmission through seeds. Virus concentration in different tissues varied; the mean amount of virus in the three cultivars was found to be 48-1234 ng per embryonic axis. 15-24 ng per cotyledon, and 12-20 ng per testa. The infection of primary leaves through the seed also resulted in systemic infection if the amount of virus in primary leaves exceeded 100 ng/100 mg of tissue. Close agreement was found between the percentage of seedlings with systemic infection and the percentage of seeds and embryonic axes containing more than 100 ng virus. The cultivars that resisted seed transmission contained relatively small amounts of the virus in embryonic axes |
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