Abstract
This chapter reviews how hydraulic architectures of tropical trees and lianas (woody vines) influence the flow of water from roots to leaves. The hydraulic design potentially can limit plant water relations, gas exchange, successional distribution, and even the maximum height (or length, in the case of lianas) that a species can attain. Important parameters include vulnerability to drought-induced cavitation (since embolism reduces hydraulic conductance), root pressures (since these potentially could result in re-filling of conduits following cavitation events, thereby increasing conductance), leaf specific conductivity (which, together with transpiration rates, can predict pressure gradiĀents throughout the plant), and water storage capacity (since this might determine the ability to survive water shortage). Some of the issues that are dealt with here are the impact of vessel diameter on drought- and freezing-induced embolism, the role of root pressures in the occasional removal of embolisms, and the ways in which the hydraulic architecture differs in different growth forms such as trees, shrubs, lianas, and hemiepiphytes. The ecological and physiological trade-offs of different architectures are discussed, and comparisons are made with temperate plants.
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Tyree, M.T., Ewers, F.W. (1996). Hydraulic Architecture of Woody Tropical Plants. In: Mulkey, S.S., Chazdon, R.L., Smith, A.P. (eds) Tropical Forest Plant Ecophysiology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1163-8_8
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DOI: https://doi.org/10.1007/978-1-4613-1163-8_8
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