Data/hora: 01/06/2024 18:04:48

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 14/09/1998
Data da última atualização: | 14/09/1998
Autoria: | TAYLOR JR, G. E.; GUNDERSON, C. A.
Título: | The response of foliar gas exchange to exogenously applied ethylene.
Ano de publicação: | 1986
Fonte/Imprenta: | Plant Physiology, v.82, p.653-657, 1986.
Idioma: | Inglês
Conteúdo: | The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families. Exposures were conducted in an open, whole-plant exposure system providing controlled levels of irradiance, air temperature, CO2, relative humidity, and ethylene concentration. Net photosynthesis and stomatal conductance to water vapor in units of moles per square meter per second were measured on recently expanded leaves in control and ethylene-treated plants using a remotely operated single-leaf cuvette. The ethylene concentration was either 0 or 210 micromoles per cubic meter and was maintained for 4 hours. Species varied substantially in the response of their foliar gas exchange to ethylene. In 7 of the 13 species, net photosynthesis was inhibited statistically by 4 hours of ethylene exposure. As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51,1%), Gossypium hirsutum (-31,7%), Glycine max (-24,8%), Cucurbita pepo (-20,4%), Phaseolus vulgaris (-18,4%), Setaria viridis (-17,5%), and Raphanus sativus (-4,4%).
Palavras-Chave: | Condutancia ertomatica; Transpiracao.
Thesagro: | Etileno.
Thesaurus Nal: | ethylene.
Categoria do assunto: | --
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (5813-1) - ADC - SP - -- - S 10344 -  - S 10344 - DIS