Data/hora: 09/06/2024 20:29:08

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	11/09/1996	
Data da última atualização: 	17/05/2023	
Autoria: 	SHARMA, N. K.; SKIDMORE, D. I.	
Afiliação: 	University of cambridge, Pembroke Street, Cambridige CB2 3DX, UK.	
Título: 	In vitro expression of partial resistance to Phytophthora palmivora byshoot cultures of papaya.	
Ano de publicação: 	1988	
Fonte/Imprenta: 	Plant Cell, Tissue and Organ Culture. v.14, p.187-196, 1988.	
Idioma: 	Inglês	
Conteúdo: 	Shoot apices of Carica papaya were multiplied in vitro on solidified nutrient media supplemented with a-naphthyl-acetic acid and 6-benzylaminopurine. The micropropagated shoots were inoculated in vitro, trough a stem wound, with a sporangial suspension (1.2 x 10\\4 sporangia ml-1)of Phytophthora palmivora. The symptoms exhibited by the shoots in vitro were similar to those described previously for infection of the whole plant in the field. The time taken for the host tissue to become brown and to wilt and the time to sporulation of the pathogen were all recorded for each shoot of four varieties of papaya challenged with each of ten isolates of P. palmivora. Significant differences were observed between host-pathogen combinations for these variables and host-s pecificity was detected amongst the isolates of P. palmivora. The timetaken for the shoot to wilt was positively correlated with the time tosporulation of the isolate but both these variables were negatively correlated with the time to browning of the shoot. In vitro selection for disease resistance will be useful during breedindg progammes involving papaya genotypes which are maintained through clonal propagation.	
Palavras-Chave: 	disease; Peneiramento; resistance.	
Thesagro: 	Carica Papaya; Doença; Mamão; Phytophthora Palmivora; Resistência.	
Thesaurus Nal: 	screening.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (16813-1) - ADC - AP - DD - Publicação digital -  -  - DIS