Changes in root hydraulic conductance (KR) of Olea oleaster seedlings following drought stress and irrigation
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چکیده
منابع مشابه
Chilling responses of maize (Zea mays L.) seedlings: root hydraulic conductance, abscisic acid, and stomatal conductance.
Maize seedling water relations and abscisic acid (ABA) levels were measured over 24 h of root chilling (5.5 degrees C). At 2.5 h into chilling, leaf ABA levels increased by 40x and stomatal conductance (g(s)) decreased to 20% compared with prechill levels. Despite a rapid g(s) response to root chilling, leaf water potential (Psi(L)) of chilled seedlings decreased to -2.2 MPa resulting in a comp...
متن کاملAmelioration of chilling-induced water stress by abscisic Acid-induced changes in root hydraulic conductance.
Pretreatment of soybean (Glycine max L. var Ransom) root systems with abscisic acid (ABA) ameliorates the deleterious effect of low temperatures on root hydraulic conductance. ABA treatment of root systems subsequently chilled to 10 degrees C with shoots at 25 degrees C resulted in higher leaf water potentials and lower stomatal resistances. If the root systems are left at 25 degrees C, ABA cau...
متن کاملResponses of transpiration and hydraulic conductance to root temperature in nitrogen- and phosphorus-deficient cotton seedlings.
Suboptimal N or P availability and cool temperatures all decrease apparent hydraulic conductance (L) of cotton (Gossypium hirsutum L.) roots. The interaction between nutrient status and root temperature was tested in seedlings grown in nutrient solutions. The depression of L (calculated as the ratio of transpiration rate to absolute value of leaf water potential [Psi(w)]) by nutrient stress dep...
متن کاملSeasonal changes of whole root system conductance by a drought-tolerant grape root system
The role of root systems in drought tolerance is a subject of very limited information compared with above-ground responses. Adjustments to the ability of roots to supply water relative to shoot transpiration demand is proposed as a major means for woody perennial plants to tolerate drought, and is often expressed as changes in the ratios of leaf to root area (A(L):A(R)). Seasonal root prolifer...
متن کاملDrought resistance of Ailanthus altissima: root hydraulics and water relations.
Drought resistance of Ailanthus altissima (Mill.) Swingle is a major factor underlying the impressively wide expansion of this species in Europe and North America. We studied the specific mechanism used by A. altissima to withstand drought by subjecting potted seedlings to four irrigation regimes. At the end of the 13-week treatment period, soil water potential was -0.05 MPa for well-watered co...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1998
ISSN: 0028-646X,1469-8137
DOI: 10.1046/j.1469-8137.1998.00258.x