water uptake

water uptake

the uptake of water into a plant through the roots. Water only enters the plant if there is a deficit in the XYLEM caused by losses during TRANSPIRATION. The path of water from soil to leaf is as follows:
  1. (a) movement of free soil water into the root hair by OSMOSIS;
  2. (b) across the CORTEX of the root towards the STELE, by one of three methods: (i) via cell walls and intercellular spaces by hydration; (ii) via PLASMODESMATA by CYCLOSIS. (iii) via cell vacuoles by osmosis;
  3. (c) through the endodermis (see CASPARIAN STRIP across the PERICYCLE and into the XYLEM VESSELS. These latter contain ions which are actively pumped into the xylem to raise the concentration of solutes, thus making the osmotic potential more negative;
  4. (d) up the plant in the xylem by a combination of: (i) TRANSPIRATION pull and cohesion-tension (see COHESION-TENSION HYPOTHESIS). (ii) capillarity (iii) ROOT PRESSURE.All water uptake is variable according to the plant, its age, environment and the time of year.
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Cuts actually should be made underwater, using a large clean container filled with water to prevent any air bubbles from entering the stem and disrupting water uptake to the flowers themselves.
Addition-type polynorbornene membranes had a poor performance on processing properties and water uptake, a simple but useful measure was to design and prepare the polynorbornene composite membranes with long alkyl side chains and fillers containing quaternary ammonium functional silica groups.
Peleg's model together with Arrhenius relationship were successfully used to evaluate water uptake of some Durum (Local names; Zenit and BurgosBurgos) and Bread (Local names; Dariyel and Karatopak) wheat varieties during soaking at a temperature range of 25-50 AdegC.
It also outscored traditional durum flour during processing and handling evaluations, thanks to its smaller particle size, improved water uptake and lower levels of damaged and broken starch granules.
It is noted for its low water uptake and therefore high dimensional stability.
However, a number of studies have demonstrated that water uptake in triticale (Mehmet et al.
The objective of this research is to evaluate experimentally the crop's water uptake of a soilless cucumber crop planted under greenhouse conditions in a tropical climate as well as to improve our understanding and to model this process under these specific conditions.
Increasing salinity can influence seed germination either by toxic effects of specific ions, such as Na, Cl and SO4, or by creating osmotic pressure which impedes seed water uptake (Kaya et al.
Weaknesses have been observed in areas regarding the control of borehole drilling and water uptake from the wells.
Headquartered in Grants Pass, OR, Mycorrhizal Applications LLC (MA) grows mycorrhizal seeds, or "spores," used to produce mycorrhizal plants that improve soil health and increase nutrient and water uptake and efficiency.
Effect of siloxane-modified polyacrylate on water uptake and anticorrosion mechanism of silicone-epoxy coatings--X.