Leaf curl syndrome of pigeonpea (Cajanus cajan (L.) Millsp.) is a systemic response to effective nodulation by the Rhizobium strain IC3342
OAR@ICRISAT
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Relation |
http://oar.icrisat.org/7582/
http://dx.doi.org/10.1016/S0885-5765(05)80136-5 |
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Title |
Leaf curl syndrome of pigeonpea (Cajanus cajan (L.) Millsp.) is a systemic response to effective nodulation by the Rhizobium strain IC3342
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Creator |
Upadhyaya, N M
Rao, J V D K K Dart, P J Letham, D S |
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Subject |
Pigeonpea
Plant Pathology |
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Description |
Rhizobium str. IC3342 is an unusual bacterium that causes a leaf curl syndrome in pigeonpea. Growth characteristics, plasmid profile, conserved nif and nod gene sequences and nodulation host range of this strain resemble that of the fast-growing Rhizobium str. ANU240 (NGR234). Leaf curl occurred only in hosts effectively nodulated. A plasmid-cured, non-nodulating derivative failed to induce leaf curl symptoms. The str. IC3342 competed poorly with fast- and slow-growing root-nodule bacteria, but the observed nodule occupancy of 10% was enough to produce leaf curl symptoms. Suppression of nodule development by added inorganic nitrogen also prevented symptom expression. Approach grafting of a healthy pigonpea plant with leaf curl symptoms resulted in the development of leaf curl symptoms on the growing shoots of the healthy plant within 8 days of graft union. Further symptom expression ceased after graft separation. Feeding xylem sap from the leaf curled plant to a healthy plant induced the initial symptom of the syndrome, bending of the growing leaf tip. It is concluded that leaf curl induction is a systemic response for which effective nodulation is an apparent prerequisite
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Publisher |
Elsevier
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Date |
1991
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Language |
en
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Rights |
—
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Identifier |
http://oar.icrisat.org/7582/1/Physiological%20and%20Molecular%20Plant%20Pathology_39_357-373_1991.pdf
Upadhyaya, N M and Rao, J V D K K and Dart, P J and Letham, D S (1991) Leaf curl syndrome of pigeonpea (Cajanus cajan (L.) Millsp.) is a systemic response to effective nodulation by the Rhizobium strain IC3342. Physiological and Molecular Plant Pathology, 38 (5). pp. 357-373. ISSN 0885-5765 |
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