Genistin and quinolizidine alkaloid induction in<i>L. angustifolius</i>aerial parts in response to mechanical damage

Chludil, Hugo D.; Leicach, Silvia R.; Corbino, Graciela Beatriz; Barriga, Lucía Guadalupe; Vilariño, María del Pilar

doi:10.1080/17429145.2012.672660

Cited by 17 publications

(15 citation statements)

References 35 publications

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“…This concept is supported by Hendricks et al (2011) who suggested that phenolic compounds in leaf might be involved in chemical defense of P. australis against herbivores and neighboring plants. In addition, Chludil et al (2012) reported that leaves of Lupinus angustifolias as with most species of Fabaceae are capable of producing chemical defenses against herbivores and pathogenic microorganisms that facilitate the biological invasion of those species. Secondly, P. australis-dominated ecosystems produce large volumes of above and belowground biomass (Park & Blossey 2008).…”

Section: Discussionmentioning

confidence: 99%

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

Uddin

Robinson

Caridi

2013

Journal of Plant Interactions

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This study investigated the possible phytotoxicity induced by Phargmites australis on phenotypic and physiological parameters of recipient plants with identification of major inhibitors in the donor plant. This was achieved using aqueous extracts of different organs and root exudates of P. australis in laboratory and greenhouse experiments with Lactuca sativa as the model test plant. The observed reduced liquid imbibition and altered resource mobilization in seeds of L. sativa, in particular an insufficient carbohydrate supply, demonstrated that the onset of germination might be negatively affected by phytotoxicity. Dose-response studies pointed out that oxidative stress through reactive oxygen species production could potentially cause the observed germination and seedling growth reductions. The osmotic effects by mannitol solution on germination as well as growth and physiology at a level of (0.57 and (0.45 bar, respectively, demonstrated that the results from aqueous plant extracts were partially induced by the osmotic potential on and above those levels. Overall, the relative strength of inhibition on measured parameters was the highest in leaf extract, followed by rhizome, root, stem, and inflorescence. Root exudates of P. australis also had negative impacts by reducing germination and growth of plant. High-performance liquid chromatography (HPLC) analysis revealed gallic acid, a potent phytotoxin, as a major compound with an order of leaf ! inflorescence ! rhizome !root ! stem.

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Section: Discussionmentioning

confidence: 99%

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

Uddin

Robinson

Caridi

2013

Journal of Plant Interactions

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“…The effects of grazing on plant communities and ecosystems are determined by the responses of individual species; the dominant species play an especially crucial role (Smith and Knapp ). For the individual plants, injury by grazing can cause a wide range of metabolic and physiological responses (Peng et al , Chludil et al ). Leaves are the main organs of assimilation in plants, so disruption of the leaves can increase water loss and change CO 2 assimilation and nutrient concentrations (Oleksyn et al ).…”

Section: Introductionmentioning

confidence: 99%

Growth–defense trade‐off regulated by hormones in grass plants growing under different grazing intensities

Liu

Gong

Liu

et al. 2018

Physiologia Plantarum

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Herbivory creates conflicts between a plant's need to allocate resources for growth and defense. It is not yet clear how plants rebalance resource utilization between growth and defense in response to increasing grazing intensity. We measured characteristics of the primary and secondary metabolism of Leymus chinensis at five levels of grazing intensity (control, light, moderate, heavy and extremely heavy). Furthermore, we evaluated hormone signaling by quantifying the impact of key hormones on plant growth and defense. Under light grazing intensity, indole-3-acetic acid and jasmonates appeared to promote the growth of L. chinensis through a high photosynthetic rate, high water-use efficiency and high soluble protein contents, whereas abscisic acid decreased these properties. Under moderate grazing intensity, L. chinensis had a low photosynthetic capacity but greater production of secondary metabolites (tannins, total flavonoids and total phenols), possibly induced by salicylic acid. When the grazing pressure further intensified, L. chinensis translocated more carbohydrates to its roots in order to survive and regrow. Leymus chinensis therefore exhibited a trade-off between growth and defense in order to survive and reproduce under herbivory. Plants developed different mechanisms to enhance their grazing tolerance by means of hormonal regulation.

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“…Quinolizidine alkaloids are typically inducible compounds (Chludil et al 2013;Wink 1983), but may accumulate after more than 48 hours. For example, in other Lupinus species, alkaloid induction occurred 72 hours after damage (Vilarino et al 2005).…”

Section: Does Herbivory Induce Changes In Phytohormones and Alkaloid mentioning

confidence: 99%

Messages from the Other Side: Parasites Receive Damage Cues from their Host Plants

2016

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As sessile organisms, plants rely on their environment for cues indicating imminent herbivory. These cues can originate from tissues on the same plant or from different individuals. Since parasitic plants form vascular connections with their host, parasites have the potential to receive cues from hosts that allow them to adjust defenses against future herbivory. However, the role of plant communication between hosts and parasites for herbivore defense remains poorly investigated. Here, we examined the effects of damage to lupine hosts (Lupinus texensis) on responses of the attached hemiparasite (Castilleja indivisa), and indirectly, on a specialist herbivore of the parasite, buckeyes (Junonia coenia). Lupines produce alkaloids that act as defenses against herbivores that can be taken up by the parasite. We found that damage to lupine host plants by beet armyworm (Spodoptera exigua) significantly increased jasmonic acid (JA) levels in both the lupine host and parasite, suggesting uptake of phytohormones or priming of parasite defenses by using host cues. However, lupine host damage did not induce changes in alkaloid levels in the hosts or parasites. Interestingly, the parasite had substantially higher concentrations of JA and alkaloids compared to lupine host plants. Buckeye herbivores consumed more parasite tissue when attached to damaged compared to undamaged hosts. We hypothesize that increased JA due to lupine host damage induced higher iridoid glycosides in the parasite, which are feeding stimulants for this specialist herbivore. Our results demonstrate that damage to hosts may affect both parasites and associated herbivores, indicating cascading effects of host damage on multiple trophic levels.

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Genistin and quinolizidine alkaloid induction inL. angustifoliusaerial parts in response to mechanical damage

Cited by 17 publications

References 35 publications

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

Growth–defense trade‐off regulated by hormones in grass plants growing under different grazing intensities

Messages from the Other Side: Parasites Receive Damage Cues from their Host Plants

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