Does light influence the relationship between a native stem hemiparasite and a native or introduced host?

Annals of Botany
Robert M CiroccoJennifer R Watling

Abstract

There have been very few studies investigating the influence of light on the effects of hemiparasitic plants on their hosts, despite the fact that hemiparasites are capable of photosynthesis but also access carbon (C) from their host. In this study we manipulated light availability to limit photosynthesis in an established hemiparasite and its hosts, and determined whether this affected the parasite's impact on growth and performance of two different hosts. We expected that limiting light and reducing autotrophic C gain in the parasite (and possibly increasing its heterotrophic C gain) would lead to an increased impact on host growth and/or host photosynthesis in plants grown in low (LL) relative to high light (HL). The Australian native host Leptospermum myrsinoides and the introduced host Ulex europaeus were either infected or not infected with the native stem hemiparasite Cassytha pubescens and grown in either HL or LL. Photosynthetic performance, nitrogen status and growth of hosts and parasite were quantified. Host water potentials were also measured. In situ midday electron transport rates (ETRs) of C. pubescens on both hosts were significantly lower in LL compared with HL, enabling us to investigate the impact of the red...Continue Reading

References

May 5, 2005·The New Phytologist·Malcolm C Press, Gareth K Phoenix
Jan 24, 2008·Annals of Botany·Duncan D CameronLouis J Irving
Aug 24, 2010·Plant Signaling & Behavior·Jakub TěšitelDuncan D Cameron
Jan 5, 2012·Oecologia·Victoria A Borowicz, Joseph E Armstrong
Sep 1, 1990·Oecologia·John D Marshall, James R Ehleringer
Oct 1, 2002·Functional Plant Biology : FPB·Shizue MatsubaraC Barry Osmond

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Citations

Mar 19, 2020·Journal of Experimental Botany·Robert M CiroccoJennifer R Watling
Aug 28, 2020·The New Phytologist·Fang-Lei GaoFei-Hai Yu
Apr 2, 2021·Plant Physiology·Jakub TěšitelDavid M Watson
Aug 20, 2021·Physiologia Plantarum·Robert M CiroccoJosé M Facelli

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