Sex determines xylem anatomy in a dioecious conifer: hydraulic consequences in a drier world
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چکیده
منابع مشابه
Sex determines xylem anatomy in a dioecious conifer: hydraulic consequences in a drier world.
Increased drought frequency and severity may reshape tree species distribution in arid environments. Dioecious tree species may be more sensitive to climate warming if sex-related vulnerability to drought occurs, since lower performance of one sex may drive differential stress tolerance, sex-related mortality rates and biased sex ratios. We explored the effect of sex and environment on branch h...
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Recent work has suggested that plants differ in their relative reliance on structural avoidance of embolism versus maintenance of the xylem water column through dynamic traits such as capacitance, but we still know little about how and why species differ along this continuum. It is even less clear how or if different parts of a plant vary along this spectrum. Here we examined how traits such as...
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15 صفحه اولSex-related spatial segregation and growth in a dioecious conifer along environmental gradients in northwestern Patagonia1
The separation of sexes in plants (dioecy) implies differences in reproductive biology that in many cases favour sexual dimorphism and spatial segregation. Females of the dioecious conifer Austrocedrus chilensis have higher reproductive effort than males. We examined the spatial distribution of male and female Austrocedrus trees along a range of environmental conditions and sex-related growth p...
متن کاملThe hydraulic conductivity of the xylem in conifer needles (Picea abies and Pinus mugo).
Main resistances of the plant water transport system are situated in leaves. In contrast to angiosperm leaves, knowledge of conifer needle hydraulics and of the partitioning of resistances within needles is poor. A new technique was developed which enabled flow-meter measurements through needles embedded in paraffin and thus quantification of the specific hydraulic conductivity (K(s)) of the ne...
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ژورنال
عنوان ژورنال: Tree Physiology
سال: 2017
ISSN: 0829-318X,1758-4469
DOI: 10.1093/treephys/tpx066