منابع مشابه
Uptake of bacteriophage f2 through plant roots.
A model system was designed to measure viral uptake through the roots of plants and translocation to distal plant parts. For this study, uptake of bacteriophage f2 was measured in corn and bean plants growing in hydroponic solutions. Few phage were detected in plants with uncut roots. However, when roots of both plant types were cut just before exposure to very high concentrations of phage, the...
متن کاملEffects of Abscisic Acid and of Hydrostatic Pressure Gradient on Water Movement through Excised Sunflower Roots.
The effect of abscisic acid on the exudation rate from decapitated roots of sunflower plants (Helianthus annuus L.) was investigated in the presence and absence of an imposed hydrostatic pressure gradient. The magnitude of the abscisic acid effect was constant even when suctions up to 60 cm Hg were applied to the cut stumps.When roots were bathed in a THO-labeled nutrient solution, the course o...
متن کاملHow does water get through roots?
uptake of water. On the contrary, at low rates of transpiration such as during the night or during stress conOn the basis of recent results with young primary ditions (drought, high salinity, nutrient deprivation), maize roots, a model is proposed for the movement of the apoplastic path will be less used and the hydraulic water across roots. It is shown how the complex, ‘comresistance will be h...
متن کاملA model for water uptake by plant roots.
We present a model for water uptake by plant roots from unsaturated soil. The model includes the simultaneous flow of water inside the root network and in the soil. It is constructed by considering first the water uptake by a single root, and then using the parameterized results thereby obtained to build a model for water uptake by the developing root network. We focus our model on annual plant...
متن کاملAquaporins: the molecular basis of facilitated water movement through living plant cells?
Osmotic effects observed with living cells indicate that their plasma membranes are freely permeable to water while essentially creating a barrier to other molecules. The hydraulic conductivity of biological membranes is sometimes still ascribed to the simple diffusion of water molecules through the lipid bilayer. However, more than 30 years ago the idea was advanced that hydraulic water moveme...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 1978
ISSN: 0305-7364,1095-8290
DOI: 10.1093/oxfordjournals.aob.a085488