Mechanical Scarification of Dodder Seeds with a Handheld Rotary Tool

Ghantous, Katherine; Sandler, Hilary A.

doi:10.1614/wt-d-11-00077.1

Cited by 11 publications

(5 citation statements)

References 19 publications

(19 reference statements)

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“…Dodder seeds were scarified in batches of 100 (0.01 g) in a 2 mL microcentrifuge tube for approximately 3 minutes using a small dremel tool [ 33 ]. Seeds were then rinsed with tap water using a fine mesh strainer, placed in Petri dishes lined with 90 mm moistened filter paper, sealed with Parafilm (Bemis Company Inc., Oshkosh, WI, USA), and placed in an incubator at 23°C until seed germination approximately 2 days later.…”

Section: Methodsmentioning

confidence: 99%

Parasite Removal, but Not Herbivory, Deters Future Parasite Attachment on Tomato

2016

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Plants face many antagonistic interactions that occur sequentially. Often, plants employ defense strategies in response to the initial damage that are highly specific and can affect interactions with subsequent antagonists. In addition to herbivores and pathogens, plants face attacks by parasitic plants, but we know little about how prior herbivory compared to prior parasite attachment affects subsequent host interactions. If host plants can respond adaptively to these different damage types, we predict that prior parasitism would have a greater deterrent effect on subsequent parasites than would prior herbivory. To test the effects of prior parasitism and prior herbivory on subsequent parasitic dodder (Cuscuta spp.) preference, we conducted two separate greenhouse studies with tomato hosts (Solanum lycopersicum). In the first experiment, we tested the effects of previous dodder attachment on subsequent dodder preference on tomato hosts using three treatments: control plants that had no previous dodder attachment; dodder-removed plants that had an initial dodder seedling attached, removed and left in the same pot to simulate parasite death; and dodder-continuous plants with an initial dodder seedling that remained attached. In the second experiment, we tested the effects of previous caterpillar damage (Spodoptera exigua) and mechanical damage on future dodder attachment on tomato hosts. Dodder attached most slowly to tomato hosts that had dodder plants previously attached and then removed, compared to control plants or plants with continuous dodder attachment. In contrast, herbivory did not affect subsequent dodder attachment rate. These results indicate that dodder preference depended on the identity and the outcome of the initial attack, suggesting that early-season interactions have the potential for profound impacts on subsequent community dynamics.

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Section: Methodsmentioning

confidence: 99%

Parasite Removal, but Not Herbivory, Deters Future Parasite Attachment on Tomato

2016

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“…This is triggered by the micropyle when a suitable environmental condition emerges. A sim claim is proposed by Ghantous Sandler [16][17][18] in their study on dodder seed dormancy. They argue that seed scarification of capsuled dodder berries is a must for them to germinate.…”

Section: Fig 1(a)mentioning

confidence: 97%

Organogenesis of Dodders, Parasitism, Infestation and Development Phases

Ngare

Koske

Gathuku

2021

AJGR

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Parasitic plants proliferation globally is daunting and a threat to our ecosystems. In this study we explore holoparasites with limitation to dodders (Cuscuta spp. & Cassytha filiformis). An experiment was performed to ascertain anatomical and morphological characteristics of dodder capsule and its stem. We present dodder infestation stages, development phases and close observable internal and external microscopic features. A distinct haustorium trait of dodders is shown by micrographs. The study finds that dodder seeds possess high ecological dispersal character with vast adaptability through morphological analysis. This ramifies their ecological phenotypic plasticity. Externally, dodder stems attack the host phloem through haustoria that suck nutrients from the sap weakening it.

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“…Les variables mesurées sur les plantes de Cuscuta australis ont été les dates suivantes: émergence de la plantule (JAS), la fixation à la plante hôte, la formation de l'haustorium, la dégénérescence de la racine, la floraison et la fructification. Chaque traitement a été répété cinq (5) fois.…”

Section: Culture De La Cuscute En Conditions De Serreunclassified

“…Contrairement à la plupart des racines, la racine de Cuscuta ne possède ni coiffe ni méristème apical (Sherman et al, 2008). Les graines présentent une dormance physique en raison de leur enveloppe dure et ne 519 germent pas facilement sans scarification (Ghantous et Sandler, 2012). Collin et Pelissou (1994) ont estimé la durée de conservation des graines dans le sol à 10 ans ou plus.…”

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