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Titolo:
NATURAL OCCURRENCE OF 5 SEED-BORNE COWPEA VIRUSES IN PAKISTAN
Autore:
BASHIR M; HAMPTON RO;
Indirizzi:
NATL AGR RES CTR,PO NARC ISLAMABAD PAKISTAN OREGON STATE UNIV,USDA ARS,DEPT BOT & PLANT PATHOL CORVALLIS OR 97331
Titolo Testata:
Plant disease
fascicolo: 9, volume: 77, anno: 1993,
pagine: 948 - 951
SICI:
0191-2917(1993)77:9<948:NOO5SC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROP GERMPLASM; SEED;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
M. Bashir e R.O. Hampton, "NATURAL OCCURRENCE OF 5 SEED-BORNE COWPEA VIRUSES IN PAKISTAN", Plant disease, 77(9), 1993, pp. 948-951

Abstract

A total of 151 cowpea leaf samples with viruslike symptoms were collected from 13 districts of Punjab and North-West Frontier Province (NWFP) of Pakistan during the summers of 1990 and 1991. Desiccated sampleswere tested by direct antigen coating (DAC) ot double antibody sandwich (DAS) enzyme-linked immunosorbent assay (ELISA) for the presence ofseven viruses known to be seedborne in cowpea: blackeye cowpea mosaic(BlCMV) and cowpea aphid-borne mosaic (CABMV) potyviruses, cucumber mosaic (CMV) cucumovirus, cowpea mosaic (CPMV) and cowpea severe mosaic(CSMV) comoviruses, cowpea motile carmovirus (CPMoV), and southern bean mosaic sobemovirus (SBMV). One or more seedborne viruses were detected in 47% (71 of 151) of the symptomatic plant samples. The viruses detected and the percent incidence were: CABMV, 29%; SBMV, 21%; CSMV, 17%; BlCMV, 8%; and CPMoV, 4%. Neither CMV nor CPMV was detected. Sevencowpea seed lots representing two commercial seed types and seven locations in Punjab and NWFP were collected for tests of the same seven seedborne viruses. Only CABMV was seed-transmitted, and only in four ofseven seed lots, at frequencies of <1 to 7%. Likewise, although leaf samples collected from plants of a local Punjab cultivar contained four ELISA-detectable seedborne viruses (BlCMV, CABMV, CSMV, and SBMV), only CABMV was transmitted through seeds (7% frequency) from these plants. None of the seven seedborne viruses tested for were detected in 80of 151 virus-symptomatic samples, suggesting infection with other viruses. This is believed to be the first record of the natural occurrence of BlCMV, CABMV, CPMoV, CSMV, and SBMV in Pakistan and the first report of CPMoV outside of Africa.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/05/20 alle ore 15:39:29