1979
DOI: 10.1111/j.1399-3054.1979.tb02589.x
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Hydraulic Resistance of Rough Lemon Roots

Abstract: A pressure chamber technique was used to estimate hydraulic root resistance in rough lemon (Citrus jambhiri Lush.) seedlings. The effect of previous water stress on hydraulic root resistance was evaluated. A factorial 3 × 3 design with four replications was established with potted rough lemon seedlings in a growth chamber. Three water‐stress treatments were applied by watering at intervals of 1, 2 and 3 days, and root resistance measurements were made after 6, 12 and 18 days of treatment. Plants that had exper… Show more

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Cited by 78 publications
(43 citation statements)
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“…Root hydraulic resistance, as measured by the Ramos and Kaufmann (1979) method, provides information on the physiological ability of roots to absorb and transport water independent of soil hydraulic conductivity, soil electrical conductivity, soil/plant interface, and soil temperature and/or oxygen concentration. Intact roots 15-30 cm in length were immersed in water inside a pressure chamber (Soil Moisture 3005, Santa Barbara, California), and the cut end of each root was passed through the pressure chamber opening and inserted into a 1 mm diameter flexible plastic tube.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Root hydraulic resistance, as measured by the Ramos and Kaufmann (1979) method, provides information on the physiological ability of roots to absorb and transport water independent of soil hydraulic conductivity, soil electrical conductivity, soil/plant interface, and soil temperature and/or oxygen concentration. Intact roots 15-30 cm in length were immersed in water inside a pressure chamber (Soil Moisture 3005, Santa Barbara, California), and the cut end of each root was passed through the pressure chamber opening and inserted into a 1 mm diameter flexible plastic tube.…”
Section: Methodsmentioning
confidence: 99%
“…Air pressure of 0.5 MPa was applied; the volume of water flowing through the roots, out of the chamber and into the tube was measured for three time intervals (between 1 and 3 min each), adjusted for the varying flux of each species. Hydraulic resistance was then calculated (see Ramos and Kaufmann 1979) as:…”
Section: Methodsmentioning
confidence: 99%
“…(Szarek & Ting, 1975). The decrease in Lp preIn response to drought, Lp decreases for Citrus venting water loss during drought and the rapid fambhiri (Ramos & Kaufmann, 1979), Glycine max increase in Lp after rewetting enhancing water uptake (Blizzard & Boyer, 1980), and Hordeum vulgare have been called rectification (Nobel & Sanderson, (Shone & Flood, 1980), as well as for the desert 1984). succulents considered here, Ferocactus acanthodes Lp may also vary at different positions along a root and thus with age, reflecting changes in anatomical * To whom correspondenee should be addressed at: De-characteristics with root development (Drew, 1979 Triticum aestivum, Zea mays (Jones, Leigh & Tomos, 1988), and A. deserti (North & Nobel, 1991 ; but increases with root age up to 4 months for main roots of the dicotyledons F. acanthodes and O. ficus-indica (Uopez & Nobel, 1991).…”
Section: Introduction (Lem) Britton and Rose And Opuntia Ficus-indica mentioning
confidence: 99%
“…Um menor fluxo de água na raiz pode ser uma conseqüência direta da baixa temperatura sobre as membranas celulares (FENNEL; MARKHART, 1998; RAMOS; KAUFMANN, 1979), uma vez que o reduzido fluxo não poderia ser explicado só pelas mudanças na viscosidade da água.…”
Section: Temperatura Do Solounclassified
“…Portanto, a temperatura teve um efeito muito maior sobre a resistência hidráulica do que sobre a viscosidade (RAMOS; KAUFMANN, 1979 O resfriamento da raiz reduziu a condutância estomática, a qual esteve associada com um rápido decréscimo no conteúdo de citocinina nos ramos, ligada a um aumento na atividade de citocininas oxidases. Esta redução de citocinina pode ter sido responsável pelo fechamento estomático, uma vez que o hormônio é conhecido por manter a abertura estomática quando aplicado às plantas (VESELOVA et al, 2005).…”
Section: Temperatura Do Solounclassified