scholarly journals Water Relations and Hydraulic Architecture of a Tropical Tree (Schefflera morototoni)

1991 ◽  
Vol 96 (4) ◽  
pp. 1105-1113 ◽  
Author(s):  
Melvin T. Tyree ◽  
David A. Snyderman ◽  
Timothy R. Wilmot ◽  
Jose-Luis Machado
Keyword(s):  
Water Relations ◽  
Tropical Tree ◽  
Hydraulic Architecture

scholarly journals Functional convergence in hydraulic architecture and water relations of tropical savanna trees: from leaf to whole plant

2004 ◽  
Vol 24 (8) ◽  
pp. 891-899 ◽  
Author(s):  
S. J. Bucci ◽  
G. Goldstein ◽  
F. C. Meinzer ◽  
F. G. Scholz ◽  
A. C. Franco ◽  
...  
Keyword(s):  
Water Relations ◽  
Tropical Savanna ◽  
Hydraulic Architecture ◽  
Functional Convergence ◽  
Whole Plant

scholarly journals Hydraulic architecture and water relations of several species at diverse sites around Sydney

2004 ◽  
Vol 52 (4) ◽  
pp. 509 ◽  
Author(s):  
Kate McClenahan ◽  
Catriona Macinnis-Ng ◽  
Derek Eamus
Keyword(s):  
Water Relations ◽  
Root Biomass ◽  
Woody Species ◽  
Leaf Water ◽  
Hydraulic Architecture ◽  
Evaporative Demand ◽  
Sapwood Area ◽  
Huber Value ◽  
Percentage Loss ◽  
Transverse Area

Seasonal comparisons of leaf water potential, root biomass, hydraulic architecture, xylem embolism and xylem dimensions were made for eight woody species in four diverse habitats (mangroves, coastal heathland, ridge-top woodland and river-flat woodland). In most comparisons, pre-dawn and minimum leaf water potentials were lower in winter than in summer, a result attributed to lower rainfall and a smaller root biomass in winter than in summer. Branch hydraulic conductivities (per unit transverse area, sapwood area or leaf area) were generally larger in summer than in winter across all species in all habitats. An inverse relationship between Huber value and conductivity was observed across all four habitats. Increased solar radiation and evaporative demand in the summer was associated with an increased percentage loss of xylem conductance arising from embolism, compared with winter. These results are discussed in the context of patterns and relationships among water relations, microclimate and hydraulic architecture.

scholarly journals Convergence in hydraulic architecture, water relations and primary productivity amongst habitats and across seasons in Sydney

2004 ◽  
Vol 31 (5) ◽  
pp. 429 ◽  
Author(s):  
Catriona Macinnis-Ng ◽  
Kate McClenahan ◽  
Derek Eamus
Keyword(s):  
Water Relations ◽  
Negative Correlation ◽  
Inverse Correlation ◽  
Leaf Traits ◽  
Significant Negative Correlation ◽  
Hydraulic Architecture ◽  
Xylem Embolism ◽  
Sapwood Area ◽  
Huber Value ◽  
The Cost

Convergence in leaf traits across biomes demonstrates generality in plant functioning. Relationships between hydraulic architecture and photosynthesis are less well studied. We investigated convergence in minimum leaf water potential (Ψmin), conductivity per sapwood area (ks), Huber value (Hv) and xylem embolism and photosynthesis in four habitats across two seasons (summer and winter) in the Sydney region in heathland, woodland (ridge-top), woodland (below-ridge) and mangrove. Seasonality strongly influenced all parameters in all habitats. Winter Ψmin values were lower than those for summer in the heathland and both woodland habitats but summer Ψmin values were lower than those for winter in the mangrove. Summer ks values were higher than winter values in all habitats, while Hv was higher in winter than summer for all habitats. Loss of conductance due to xylem embolism was larger in summer than winter in eight of 11 species. We also investigated relationships between the hydraulic parameters across habitats. There was a strong, significant inverse correlation between log-transformed Hv and log-transformed ks, which held across the seasons. There were significant inverse correlations between Ψmin and xylem embolism, which held within seasons but not across seasons. We found a strong, significant positive correlation between ks and Ψmin also within seasons but not across seasons and a significant negative correlation between xylem embolism and ks for winter but only a weak negative correlation between xylem embolism and ks for summer. We believe the seasonal patterns and relationships in hydraulic architecture and water relations are driven by the cost of efficient sapwood. This is demonstrated by the negative correlation between photosynthetic rate and ks in winter.

Comparative hydraulic architecture of tropical tree species representing a range of successional stages and wood density

Oecologia ◽  
2011 ◽  
Vol 167 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Katherine A. McCulloh ◽  
Frederick C. Meinzer ◽  
John S. Sperry ◽  
Barbara Lachenbruch ◽  
Steven L. Voelker ◽  
...  
Keyword(s):  
Wood Density ◽  
Tree Species ◽  
Tropical Tree ◽  
Hydraulic Architecture ◽  
Tropical Tree Species ◽  
Successional Stages
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