Hydraulic efficiency and coordination with xylem resistance to cavitation, leaf function, and growth performance among eight unrelated Populus deltoides×Populus nigra hybrids
نویسندگان
چکیده
منابع مشابه
Stem xylem resistance to cavitation is related to xylem structure but not to growth and water-use efficiency at the within-population level in Populus nigra L.
Xylem resistance to drought-induced cavitation is a key trait of plant water relations. This study assesses the genetic variation expressed for stem cavitation resistance within a population of a riparian species, the European black poplar (Populus nigra L.), and explores its relationships with xylem anatomy, water-use efficiency (WUE), and growth. Sixteen structural and physiological traits re...
متن کاملEcological differentiation in xylem cavitation resistance is associated with stem and leaf structural traits.
Cavitation resistance is a critical determinant of drought tolerance in tropical tree species, but little is known of its association with life history strategies, particularly for seasonal dry forests, a system critically driven by variation in water availability. We analysed vulnerability curves for saplings of 13 tropical dry forest tree species differing in life history and leaf phenology. ...
متن کاملXylem cavitation and loss of hydraulic conductance in western
erophylla (Raf.) Sarg.) seedlings experience water stress and declining xylem pressure potential (Ψx). Low Ψx can result in xylem cavitation and embolism formation, causing a decline in hydraulic conductance. This study focused on the relationship between Ψx, xylem cavitation and transpiration (E) of newly planted seedlings. Leaf specific hydraulic conductance (kAB) declined from 0.56 to 0.09 m...
متن کاملStudy of Growth Function of Black Poplar (Populus Nigra) With Kermanshah and Zanjan Origin in Karaj Research Station
In order to evaluate the growth function of Populus nigra trees under homogeneous conditions, a total of 24 individuals of P. nigra (3 individuals per stand) were sampled from 8 artificial stands in Kermanshah province and 12 individuals of P. nigra (3 individuals per stand) were sampled from 4 artificial stands in Zanjan province. In order to assimilate environmental conditions, seedlings were...
متن کاملDo xylem fibers affect vessel cavitation resistance?
Possible mechanical and hydraulic costs to increased cavitation resistance were examined among six co-occurring species of chaparral shrubs in southern California. We measured cavitation resistance (xylem pressure at 50% loss of hydraulic conductivity), seasonal low pressure potential (P(min)), xylem conductive efficiency (specific conductivity), mechanical strength of stems (modulus of elastic...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2010
ISSN: 1460-2431,0022-0957
DOI: 10.1093/jxb/erq415