Data/hora: 09/06/2024 23:10:22

Biblioteca(s): | Embrapa Meio Ambiente.
Tipo da produção científica: | Orientação de Tese de Pós-Graduação
Data corrente: | 21/10/2013
Data da última atualização: | 21/10/2013
Autoria: | SILVA, C. E. O. da.
Afiliação: | CARLOS EDUARDO OLIVEIRA DA SILVA, FCA-UNESP.
Título: | Efeito do aumento da concentração de dióxido de carbono do ar sobre a mancha foliar causada por cylindrocladium candelabrum em mudas de eucalyptus urophylla.
Ano de publicação: | 2013
Fonte/Imprenta: | 2013.
Páginas: | 51 f.
Descrição Física: | il. color., grafs., tabs.
Idioma: | Português

Notas:

Dissertação (Mestrado em Agronomia - Proteção de Plantas) - Faculdade de Ciências Agronômicas, Unesp, Botucatu.
Orientadora: Raquel Ghini.
Inclui bibliografia.

Conteúdo: | Abstract: The concentration of CO2 in the atmosphere has been increasing significantly since the Industrial Revolution. Because of the potential impacts of the increase in CO2 from the air on the various pathosystems, assays were carried out in a controlled environment to check the effects of elevation of the concentration of CO2 from the air on Cylindrocladium candelabrum in detached leaves and seedlings of Eucalyptus urophylla. In three trials, detached leaves were wrapped in plastic trays with foam moistened with concentration of 607 ± 86, 705 ± 105, 855 ± 152 and 1101 ± 305 micromol mol-1 CO2 from the air, sprayed with conidia of the pathogen (2 × 105 conidia ml-1) and maintained at 28 ± 1.7 oC and photoperiod of 12 h for 21 days. It was evaluated the severity of leaf spot and the sporulation of the pathogen. In both experiments with seedlings of eucalyptus, the seedlings were grown in plastic tubes, kept in plastic boxes containing vermiculite at the bottom and kept in concentrations of 451 ± 35 (control), 645 ± 118, 904 ± 116, 1147 ± 216 micromol mol-1 CO2 per 30 days for acclimatization. After this period, the seedlings were sprayed with conidia of the pathogen and kept on the same conditions for six days. It was evaluated the incidence of lesioned leaves, leaf spot severity and the number of leaves containing spores of the pathogen. The height of the seedlings, the diameter of the stem and the weight of the dry matter of the aerial part and root were also evaluated. In the tests with detached leaves, the increase of CO2 concentration had no effect on the severity of leaf spot and sporulation of the pathogen. In seedlings, the elevation of CO2 concentration decreased the incidence of leaves lesioned, the severity of the disease and the number of leaves containing spores of the pathogen when compared to the control. In the variables of plant growth, the increase in the concentration of CO2 has ...
Palavras-Chave: | Cylindrocladium candelabrum; Leaf spotting; Mudanças climáticas.
Thesagro: | Ar; Clima; Dioxido de carbono; Doença de planta; Eucalipto; Eucalyptus Urophylla; Mancha foliar.
Thesaurus Nal: | Carbon dioxide; Climate change.
Categoria do assunto: | H Saúde e Patologia
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/91261/1/2013TS01.pdf
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (12843-1) - UPA - TS - PP - 0635 -  - 2013.00635 - DIS