Data/hora: 21/06/2024 16:06:51

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 17/08/1993
Data da última atualização: | 17/08/1993
Autoria: | HALL, A. E.; CAMACHO-B, S. E.; KAUFMANN, M. R.
Afiliação: | University of California, Riverside, California 92502; Instituto Columbiano Agropecuario, Apartado Aereo 7984, Bogota, D.E., Colombia, SouthAmerica.
Título: | Regulation of Water Loss by Citrus Leaves.
Ano de publicação: | 0
Fonte/Imprenta: | Colheita; Clima seco; Laranja doce; Muda.
Páginas: | p.04
Idioma: | Inglês
Conteúdo: | The factores responsible for the low transpiration rates of citrus were investigated. Leaf resistance to water vapor exchange by orange seedlings (Citrus Sinensis L. cv. Koethen) including a substantial boundary layer resistance, was as low as 1 s cm-1 in humid air. Leaf resistance of well watered plants increased to values as large as 5 s cm-1 when the difference in absolute humidity between leaf and air was increased. Leaf resistance was only slightly influenced by temperature between 20 and 30 dgree C providing the humidity difference between leaf and air was kept constant. Leaf resistance increased when leaf temperature was increased between 20 and 30 dgree C when the absolute humidity external to the leaf was kept constant. Increased humidity differences resulted in greater increases in leaf resistance during initial experiments than when the experiments were repeated with the same leaves indicating acclimation by the plant. It was concluded that the effects of humidity differences on leaf resistance are partially responsible for the low transpiration rates of citrus.
Palavras-Chave: | Clima seco.
Thesagro: | Colheita; Laranja Doce; Muda.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (15310-1) - ADC - SP - -- - S5526 -  - S5526 - DIS