Unusual stomatal behaviour on partial root excision in wheat seedlings
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چکیده
منابع مشابه
Stomatal conductance, growth and root signaling in young oak seedlings subjected to partial soil drying.
Leaf conductance, water relations, growth, and abscisic acid (ABA) concentrations in xylem sap, root apices and leaves were assessed in oak seedlings (Quercus robur L.) grown with a root system divided between two compartments and subjected to one of four treatments: (a) well watered, WW; (b) half of root system exposed to soil drying and half kept well watered, WD; (c) whole root system expose...
متن کاملStomatal conductance, growth and root signaling in Betula pendula seedlings subjected to partial soil drying.
Seedlings of Betula pendula Roth were grown with their root systems separated between two soil compartments. Four treatments were imposed: (i) adequate irrigation in both compartments (WW, controls); (ii) adequate irrigation in one compartment and drought in the other compartment (WD); (iii) drought in both compartments (DD); and (iv) half of the root system severed and the remainder kept well-...
متن کاملPentose metabolism in wheat seedlings.
Plants contain large quantities of pentoses, chiefly xylose and L-arabinose, which exist in combined form in polysaccharides such as hemicelluloses or gums. Free pentose sugars are not encountered in plants in any significant amounts. Comparatively little is known about pentose metabolism in plants. Earlier experiments, in which plants were infiltrated with hexose sugars, such as glucose, fruct...
متن کاملChilling 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 کاملRoot-shoot interaction in the greening of wheat seedlings grown under red light.
Wheat seedlings grown with roots exposed to constant red light (300-500 micromoles m-2 s-1) did not accumulate chlorophyll in the leaves. In contrast, seedlings grown with their roots shielded from light accumulated chlorophylls. Chlorophyll biosynthesis could be induced in red-light-grown chlorophyll-deficient yellow plants by either reducing the red-light intensity at the root surface to 100 ...
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ژورنال
عنوان ژورنال: Plant, Cell and Environment
سال: 2004
ISSN: 0140-7791,1365-3040
DOI: 10.1046/j.0016-8025.2003.01126.x