Xylem tension affects growth-induced water potential and daily elongation of maize leaves
نویسندگان
چکیده
منابع مشابه
Root pressurization affects growth-induced water potentials and growth in dehydrated maize leaves.
Profiles of water potential (Psi w) were measured from the soil to the tips of growing leaves of maize (Zea mays L.) when pressure (P) was applied to the soil/root system. At moderately low soil Psi w, leaf elongation was somewhat inhibited, large tensions existed in the xylem, and Psi w were slightly lower in the elongating leaf tissues than in the xylem, i.e. a growth-induced Psi w was presen...
متن کاملRelationship of water potential to growth of leaves.
A thermocouple psychrometer that measures water potentials of intact leaves was used to study the water potentials at which leaves grow. Water potentials and water uptake during recovery from water deficits were measured simultaneously with leaves of sunflower (Helianthus annuus L.), tomato (Lycopersicon esculentum Mill.), papaya (Carica papaya L.), and Abutilon striatum Dickson. Recovery occur...
متن کاملTranspiration- and growth-induced water potentials in maize.
Recent evidence from leaves and stems indicates that gradients in water potential (psi(w)) necessary for water movement through growing tissues are larger than previously assumed. Because growth is sensitive to tissue psi(w) and the behavior of these gradients has not been investigated in transpiring plants, we examined the water status of all the growing and mature vegetative tissues of maize ...
متن کامل(18)O spatial patterns of vein xylem water, leaf water, and dry matter in cotton leaves.
Three leaf water models (two-pool model, Péclet effect, and string-of-lakes) were assessed for their robustness in predicting leaf water enrichment and its spatial heterogeneity. This was achieved by studying the (18)O spatial patterns of vein xylem water, leaf water, and dry matter in cotton (Gossypium hirsutum) leaves grown at different humidities using new experimental approaches. Vein xylem...
متن کاملInhibitory effects of water deficit on maize leaf elongation.
The growth rate of maize leaves has been investigated for plants grown in pots in controlled conditions and subjected to slow drying over a period of days. The elongation of leaves experiencing water deficit was inhibited primaily during the afternoon. No decrease in the turgor of the growing cells could be detected at that time. Solute concentration in the growing cells increased in tissue exp...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2008
ISSN: 1460-2431,0022-0957
DOI: 10.1093/jxb/erm371