Hydraulic redistribution by Protea 'Sylvia' (Proteaceae) facilitates soil water replenishment and water acquisition by an understorey grass and shrub

Functional Plant Biology : FPB
Heidi-J HawkinsMichael D Cramer

Abstract

Proteaceae of the Cape Floristic Region, South Africa, transpire throughout the summer drought, implying access to deep water. Hydraulic redistribution by Protea 'Sylvia' [P. susannae E. Phillips × P. exima (Salisb. Ex Knight) Fource; Proteaceae] was investigated in overnight pot and field experiments, where it was hypothesised that (1) Proteaceae replenish water in upper soil layers, (2) hydraulic redistribution facilitates nutrient uptake and (3) shallow-rooted understorey plants 'parasitise' water from proteas. Potted Sylvias redistributed ~17% of the tritiated water supplied, equating to 34 ± 1.2 mL plant-1. Shallow-rooted Cyanodon dactylon (L.) Pers. (Poaceae), plants growing in the same pots as Sylvia contained amounts of labelled water similar to those found in Sylvia, indicting water parasitism. In the field, Sylvia plants growing in aeolian sands took up the deuterated water applied at 1.2 m depth as indicated by increased δ2H of plant xylem water from -38 ± 0.8 to 334 ± 157‰. This deuterated water was then redistributed to the upper soil layer (0.2 and 0.4 m), as indicated by increased δ2H of soil water from -24.5 ± 0.7 to -8.0 ± 3.0‰ and soil moisture from 0.48 to 0.89%. Lithium, as a K-analogue, was taken up equally...Continue Reading

References

Nov 15, 2000·Trends in Plant Science·R B JacksonT E Dawson
Mar 24, 2006·Rapid Communications in Mass Spectrometry : RCM·Adam G WestJames R Ehleringer
Sep 28, 2007·Plant, Cell & Environment·Andrew J McElroneRobert B Jackson
Jun 1, 1998·Trends in Ecology & Evolution·J L Horton, S C Hart
Jan 1, 1998·Oecologia·Martyn M CaldwellJames H Richards
Jul 1, 1998·Oecologia·Stephen S O BurgessChin K Ong
Jan 1, 2001·Oecologia·Stephen S O BurgessChin K Ong

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Citations

Aug 19, 2010·Plant, Cell & Environment·Timothy M BlebyRobert B Jackson
Sep 1, 2012·Functional Plant Biology : FPB·Iv N PrietoFrancisco I Pugnaire
Oct 8, 2021·BioTechniques·Mery Nair Sáenz-Rodríguez, Gladys Iliana Cassab López

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