Does zinc protect the zinc hyperaccumulator <i>Arabidopsis halleri</i> from herbivory by snails?

Huitson, Simone B.; Macnair, Mark R.

doi:10.1046/j.1469-8137.2003.00783.x

Cited by 46 publications

(30 citation statements)

References 28 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In laboratory experiments using binary feeding choices, Pollard and Baker (1997), Jhee et al (1999) and Behmer et al (2005) showed that several phytophagous invertebrates preferred to eat low-Zn leaves of the hyperaccumulator Thlaspi caerulescens compared with high-Zn ones. In contrast, Huitson and Macnair (2003) did not Wnd any protective role of Zn in the hyperaccumulator Arabidopsis halleri. Recently, Noret et al (2005) found that organic defences (glucosinolates), rather than Zn, deterred snails from eating the Zn hyperaccumulator T. caerulescens.…”

Section: Introductionmentioning

confidence: 67%

Do metal-rich plants deter herbivores? A field test of the defence hypothesis

et al. 2007

View full text Add to dashboard Cite

Some plant species growing on metalliferous soils are able to accumulate heavy metals in their shoots up to very high concentrations, but the selective advantage of this behaviour is still unknown. The most popular hypothesis, that metals protect plants against herbivores, has been tested several times in laboratory conditions, with contradictory results. We carried out the first large-scale test of the defence hypothesis in eight natural populations of the model Zn hyperaccumulator Thlaspi caerulescens J. and C. Presl (Brassicaceae). In two climatic regions (temperate, Belgium-Luxembourg, and Mediterranean, southern France), we worked in metalliferous and in normal, uncontaminated environments, with plants spanning a wide range of Zn concentrations. We also examined the importance of glucosinolates (main secondary metabolites of Brassicaceae) as antiherbivore defences. When exposed to natural herbivore populations, T. caerulescens suffered lower herbivory pressures in metal-enriched soils than in normal soils, both in Belgium-Luxembourg and in southern France. The trapping of gastropods shows an overall lower population density in metalliferous compared to normal environments, which suggests that herbivory pressure from gastropods is lower on metalliferous soils. In addition, foliar concentration of glucosinolates was constitutively lower in all populations from metal-enriched soils, suggesting that these have evolved towards lower investment in organic defences in response to lower herbivory pressure. The Zn concentration of plants had a protective role only for Belgian metallicolous plants when transplanted in normal soils of Luxembourg. These results do not support the hypothesis that Zn plays a key role in the protection of T. caerulescens against enemies. In contrast, glucosinolates appear to be directly involved in the defence of this hyperaccumulator against herbivores.

show abstract

Section: Introductionmentioning

confidence: 67%

Do metal-rich plants deter herbivores? A field test of the defence hypothesis

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Thus, high-Ni plants were better defended against DBM than low-Ni plants. A critical question for the elemental defence hypothesis (see Huitson and Macnair 2003;Macnair 2003) is whether the defensive effect is due to Ni or to another trait that correlates with hyperaccumulation status. Although we cannot completely rule out other correlated traits (but can address glucosinolate concentrations: see below), our artificial diet experiment did explore the toxicity of Ni to DBM.…”

Section: Discussionmentioning

confidence: 99%

Nickel hyperaccumulation by Streptanthus polygaloides protects against the folivore Plutella xylostella (Lepidoptera: Plutellidae)

et al. 2005

View full text Add to dashboard Cite

We determined the effectiveness of Ni as an elemental defence of Streptanthus polygaloides (Brassicaceae) against a crucifer specialist folivore, diamondback moth (DBM), Plutella xylostella. An oviposition experiment used arrays of S. polygaloides grown on Ni-amended (high-Ni) soil interspersed with plants grown on unamended (low-Ni) soil and eggs were allowed to hatch and larvae fed freely among plants in the arrays. We also explored oviposition preference by allowing moths to oviposit on foil sheets coated with high-or low-Ni plant extract. This was followed by an experiment using low-Ni plant extract to which varying amounts of Ni had been added and an experiment using sheets coated with sinigrin (allyl glucosinolate) as an oviposition stimulant. Diamondback moths laid 2.5-fold more eggs on low-Ni plants than on high-Ni plants and larval feeding was greater on low-Ni plants. High-Ni plants grew twice as tall, produced more leaves, and produced almost 3.5-fold more flowers. Low-Ni plants contained more allyl glucosinolate than high-Ni plants and moths preferred to oviposit on foil sheets dipped in low-Ni plant extract. Moths showed no preference when Ni concentration of low-Ni extract was varied and overwhelmingly preferred sinigrin coated sheets. We conclude that Ni hyperaccumulation is an effective elemental defence against this herbivore, increasing plant fitness through a combination of toxicity to DBM larvae and decreased oviposition by adults.

show abstract

“…In recent years, the so-called defence hypothesis has been thoroughly investigated. Although some studies showed no defensive effects of high levels of Zn (Huitson and Macnair 2003;Noret et al 2005), a growing body of experimental evidence exists indicating that hyperaccumulation may defend plants against herbivores Martens and Boyd 1994;Pollard and Baker 1997;Jhee et al 1999;Boyd et al 2002;Hanson et al 2003;Behmer et al 2005;Jiang et al 2005;Jhee et al 2006) as well as against pathogens Ghaderian et al 2000;Hanson et al 2003). Defence can be achieved by two known mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Effects of nickel hyperaccumulation in Alyssum pintodasilvae on model arthropods representatives of two trophic levels

Gonçalves

Portugal

et al. 2006

Plant Soil

View full text Add to dashboard Cite

An experimental assessment of the defence hypothesis of nickel (Ni) hyperaccumulation in Alyssum was lacking. Also, to date no study had investigated the effects of hyperaccumulator litter on a detritivore species. We performed several experiments with model arthropods representatives of two trophic levels: Tribolium castaneum (herbivore) and Porcellio dilatatus (detritivore). In no-choice trials using artificial food disks with different Ni concentrations, T. castaneum fed significantly less as Ni concentration increased and totally rejected disks with the highest Ni concentration. In choice tests, insects preferred disks without Ni. In the no-choice experiment, mortality was low and did not differ significantly among treatments. Hence, this suggested a deterrent effect of high Ni diet. Experiments with P. dilatatus showed that isopods fed A. pintodasilvae litter showed significantly greater mortality (83%) than isopods fed litter from the non-hyperaccumulator species Iberis procumbens (8%), Micromeria juliana (no mortality) or Alnus glutinosa (no mortality). Also, isopods consumed significantly greater amounts of litter from the nonhyperaccumulator plant species. The behaviour of isopods fed A. pintodasilvae litter suggested an antifeedant effect of Ni, possibly due to postingestive toxic effects. Our results support the view that Ni defends the Portuguese serpentine hyperaccumulator A. pintodasilvae against herbivores, indicating that Ni can account both for feeding deterrence and toxic effects. The effects of hyperaccumulator litter on the detritivore P. dilatatus suggest that the activity of these important organisms may be significantly impaired with potential consequences on the decomposition processes.

show abstract

Does zinc protect the zinc hyperaccumulator Arabidopsis halleri from herbivory by snails?

Cited by 46 publications

References 28 publications

Do metal-rich plants deter herbivores? A field test of the defence hypothesis

Do metal-rich plants deter herbivores? A field test of the defence hypothesis

Nickel hyperaccumulation by Streptanthus polygaloides protects against the folivore Plutella xylostella (Lepidoptera: Plutellidae)

Effects of nickel hyperaccumulation in Alyssum pintodasilvae on model arthropods representatives of two trophic levels

Contact Info

Product

Resources

About