A possible role for the dorsolateral protocerebral neurosecretory neurons in the trophic adaptations of Lymantria dispar (Lepidoptera: Lymantriidae)

Perić-Mataruga, Vesna; Lazarević, Jelica; Nenadovic, Vera

doi:10.14411/eje.2001.042

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…Based on their size and morphological characteristics, we divided protocerebral neurosecretory neurons of Lymantria dispar L. (for ease of monitoring the results) into groups; one of these is the A2 group of neurons with average diameter of 20 Fm (PERIAE-MATARUGA et al 2001;PERIAE--MATARUGA & LAZAREVIAE 2004).…”

Section: Histological Techniquesmentioning

confidence: 99%

“…All stressors, regardless of their nature, and including pollution stress, can cause changes in the activity of the neuroendocrine system (RAABE 1982;IVANOVIAE & JANKOVIAE-HLADNI 1991) and morphometric characteristics of protocerebral neurosecretory neurons (PERIAE-MATARUGA et al 2001, 2004. Neurohormones are the master regulators of all physiological and metabolic processes, including secretion of the hormones that regulate growth, development, reproduction, metabolic processes, stress responses and homeostasis in insects.…”

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confidence: 99%

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Effects of Cadmium on Protocerebral Neurosecretory Neurons and Fitness Components in Lymantria dispar L.

Ilijin¹,

Perić-Mataruga²,

Radojičić³

et al. 2009

folia biol (krakow)

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Changes in fitness components including larval stage duration, relative growth rate (RGR), and mass of the gypsy moth, Lymantria dispar L. (Lepidoptera: Lymantriidae), were investigated in caterpillars fed a synthetic diet with or without a cadmium supplement (10, 30, 100, 250 Fg Cd/g dry food weight). Morphometric changes of large protocerebral dorsomedial A2 neurosecretory neurons, their nuclei and the electrophoresis profiles of brain proteins were analyzed in the 4 JD instar gypsy moths fed the examined diets. The duration of the fourth larval instars were prolonged and RGR and body mass reduced if the caterpillars were fed diets containing high concentrations of cadmium (100 and 250 Fg). The size of large A2 dorsomedial neurosecretory neurons and their nuclei were significantly higher in larvae fed the diets supplemented with 10, 100 and 250 Fg Cd. A large amount of neurosecretory material appeared in dorsomedial neurosecretory neurons in larvae fed diets with 100 and 250 Fg Cd. Differences in larval brain protein profiles in the region of molecular mass ranges (Mr) of 98kDa, 46kDa and 3.4-6.1 kDa were identified in the experimental groups.

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Section: Histological Techniquesmentioning

confidence: 99%

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confidence: 99%

Effects of Cadmium on Protocerebral Neurosecretory Neurons and Fitness Components in Lymantria dispar L.

Ilijin¹,

Perić-Mataruga²,

Radojičić³

et al. 2009

folia biol (krakow)

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“…A dominant role for the neuroendocrine system in mechanisms of stress response in insects has been indicated (Janković-Hladni, 1991;Perić-Mataruga et al, 2001b;Gruntenko et al, 2005;Krishnan and Kodrik, 2012). Different stressors modify the activity of neurosecretory neurons (NSNs).…”

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confidence: 99%

Prothoracicotropic hormone-producing neurosecretory neurons and antioxidative defense in midgut of Lymantria dispar in trophic stress

Perić-Mataruga

Vlahović²,

Mrdaković³

2014

Turk J Biol

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IntroductionAs a gradogenic polyphagous and invasive species, the gypsy moth (Lymantria dispar L.) encounters different environmental challenges. Considering that its host range is estimated at more than 500 plant species within 73 families (Liebhold et al., 1995), the gypsy moth is characterized by a variety of adaptations that ensure survival and reproduction in heterogeneous and stressful environments. Problems with gypsy moth overcrowding are not solved yet (Demir et al., 2009(Demir et al., , 2012. Plants from the genus Quercus are accepted as the most suitable food and the most susceptible to L. dispar population eruptions (Maksimović, 1987;Liebhold et al., 1995). In the Republic of Serbia, large areas of forest and orchards were attacked (171,914 ha) by gypsy moths in 2012 according to the State Enterprise for Forest Management of Serbia (http:// www.srbijasume.rs/). Other parts of Europe are also at risk of gypsy moth invasion and degradation of forest ecosystems. This pest insect is one of the most serious insect defoliators of North American forests and urban landscapes according to the US Forest Service (http:// www.fs.fed.us/). Gypsy moth defoliation results in loss of growth, mortality of oak species, and shifts in species composition in mixed-oak forests (McGraw et al., 1990). Young oak leaves contain low amounts of flavonoids in spring when L. dispar attacks them (Salminen et al., 2004). A high population density of gypsy moths induces changes in leaf chemistry during defoliation, i.e. flavonoid content increases, leading to suppression of the insect immune response, and their resistance to viruses is lowered (Martemyanov et al., 2012). One of the very rare species of plant that is an unsuitable host for gypsy moths is the locust tree, Robinia pseudoacacia (Barbosa and Krischik, 1987). A nonfamiliar host plant for L. dispar, R. pseudoacacia is a widespread species in its native habitat in southeastern North America. It was introduced to Europe in 1601 (Chapman, 1935). Today, it has spread throughout western, central, eastern, and southern Europe and has become a major invasive species with a significant impact on native plant communities. Despite the large number of polyphagous species of Lepidoptera and the long period after the introduction of R. pseudoacacia to Europe, so far only a few native lepidopteran species have adapted to it (Kulfan, 2012). The unfavorable effects of locust leaves on gypsy moth larvae can be attributed to the presence of phenolic defensive compounds (Barbosa Abstract: As a very invasive insect species, Lymantria dispar is adaptable and sensitive to a changing environment. In insects the neuroendocrine system first reacts to stress by production of prothoracicotropic neurohormones (PTTH) that control ecdysteroid synthesis (morphogenetic and stress hormones). In this article, we report changes in the L2' brain neurosecretory neurons that synthesize PTTH in L. dispar larvae after feeding on locust tree leaves (Robinia pseudoacacia), an unsuitable host plant. Groups of larvae...

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“…On the basis of the location [Fig. (A) ] and size of these neurons we determined that they were L2' nsn (Perić‐Mataruga et al, ).…”

Section: Resultsmentioning

confidence: 99%

Responses of PTTH‐producing neurosecretory neurons in Lymantria dispar caterpillars exposed to cadmium

Ilijin

Vlahović

Mrdaković

et al. 2012

Environmental Toxicology

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Lymantria dispar, as most invasive insect species, is very adaptable and reacts quickly to changing environment. Neuroendocrine system first reacts to stress in insects, and specific neurohormonal reorganization may be used in early heavy metal risk assessment. Prothoracicotropic neurohormones (PTTH) control ecdysteroid synthesis (morphogenetic and stress hormones) in insects. In this article, we report the presence of PTTH immunoreactive molecules in L2' dorsolateral neurosecretory neurons (nsn) in caterpillar brains and changes after exposure to pollutant stress of different intensity. For 3 days, after molting into the 4th instar, caterpillars of Lymantria dispar were fed with a high wheat germ diet without (control) or with added cadmium (experimental groups: 10, 30, 100, 250 μg Cd/g dry food weight). Changes in PTTH producing L2' nsn and differences in the intensity of protein bands in the region of PTTH molecular mass (Mr 11-15 kDa) were analyzed. The number of L2' neurons tended to decrease except in the group given the highest cadmium concentration (250 μg). The neurons were enlarged after acute treatment especially in the group given the highest cadmium concentration. The size of L2' nsn nuclei was decreased only in the group fed with 30 μg Cd. Protein band intensity in the Mr region of PTTH remained unchanged in all groups except for the group given the diet with the highest Cd concentration.

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A possible role for the dorsolateral protocerebral neurosecretory neurons in the trophic adaptations of Lymantria dispar (Lepidoptera: Lymantriidae)

Cited by 10 publications

References 34 publications

Effects of Cadmium on Protocerebral Neurosecretory Neurons and Fitness Components in Lymantria dispar L.

Effects of Cadmium on Protocerebral Neurosecretory Neurons and Fitness Components in Lymantria dispar L.

Prothoracicotropic hormone-producing neurosecretory neurons and antioxidative defense in midgut of Lymantria dispar in trophic stress

Responses of PTTH‐producing neurosecretory neurons in Lymantria dispar caterpillars exposed to cadmium

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