The effects of peanut mottle virus (PMV) infection upon nodulation and nodule function of Early Prolific peanut, inoculated with either effective or ineffective cowpea Rhizobium grown under controlled conditions, were assessed at 4 different growth stages. Virus-infected plants showed differences in symptom expression, magnitude of yield reduction, and nodulation pattern, depending on whether they harbored the effective or ineffective rhizobial strain. In the virus-infected plants with effective Rhizobium, the commencing of nitrogenase (C(,2)H(,2)) activity was delayed and the activity measured per plant basis was reduced but the maximum nodular specific activity was not altered as compared with those of the healthy plants. There was no correlation between leghemoglobin content and nitrogenase (C(,2)H(,2)) specific activity of the nodules from PMV-infected plants but a positive correlation was observed in the healthy controls. The results from infectivity assays, electron microscopy and indirect immunofluorescence indicate the presence of infective PMV in the tissues of both effective and ineffective nodules. Histological and cytological abnormalities observed in the nodular tissues of PMV-infected plants are suggested as a cause of reduced nitrogen-fixation efficiency of the peanut.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.77125 |
| Date | January 1981 |
| Creators | Wongkaew, Sopone. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Plant Science) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 000593579, proquestno: AAINK54944, Theses scanned by UMI/ProQuest. |
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