Wax glands ultrastructure and chemical composition of wax of giant mealybug Drosicha stebbingii (Green) (Hemiptera: Monophlebidae)

Ahmad, Ayashaa; Kundu, Aditi; Dey, Debjani

doi:10.1016/j.aspen.2020.03.009

Cited by 6 publications

(8 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 and Supplementary Data 1 ). This was slightly different from that observed in the giant mealybug Drosicha stebbingii (Green) which contains hydrocarbons, esters, alcohols, ketones, and acids 10 . CHCs are the main components of cotton mealybug wax (Fig.…”

Section: Discussioncontrasting

confidence: 84%

“…This provided direct evidence not only for PsFAR involvement in wax biosynthesis but also for the significant contribution of CHCs content to the stability and function of mealybug wax. We paid careful attention to the potential effects of host plants on CHCs composition, as reported by Ahmad et al 10 . Thus, we compared the difference in CHCs profiles between dsRNA microinjection groups that were reared on tomato or tobacco groups, where C 23 , C 25 , C 27 , and C 29 were found to be absent in the former.…”

Section: Discussionmentioning

confidence: 99%

“…Unlike adult males that have an elongated body with wings but no wax, female mealybugs are globose, flattened, wingless, and typically covered by a layer of thick, powdery wax. This waxy layer is comprised of a complex mixture of lipids including cuticular hydrocarbons (CHCs), fatty acids, esters, alcohols, and ketones 10 . Among these chemicals, the CHCs may vary tremendously in their composition between different mealybug species 11 , which implies that CHCs are closely correlated to the biological functions of the waxy layer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fatty acyl-CoA reductase influences wax biosynthesis in the cotton mealybug, Phenacoccus solenopsis Tinsley

Tong

Wang

et al. 2022

Commun Biol

View full text Add to dashboard Cite

Mealybugs are highly aggressive to a diversity of plants. The waxy layer covering the outermost part of the integument is an important protective defense of these pests. However, the molecular mechanisms underlying wax biosynthesis in mealybugs remain largely unknown. Here, we analyzed multi-omics data on wax biosynthesis by the cotton mealybug, Phenacoccus solenopsis Tinsley, and found that a fatty acyl-CoA reductase (PsFAR) gene, which was highly expressed in the fat bodies of female mealybugs, contributed to wax biosynthesis by regulating the production of the dominant chemical components of wax, cuticular hydrocarbons (CHCs). RNA interference (RNAi) against PsFAR by dsRNA microinjection and allowing mealybugs to feed on transgenic tobacco expressing target dsRNA resulted in a reduction of CHC contents in the waxy layer, and an increase in mealybug mortality under desiccation and deltamethrin treatments. In conclusion, PsFAR plays crucial roles in the wax biosynthesis of mealybugs, thereby contributing to their adaptation to water loss and insecticide stress.

show abstract

Section: Discussioncontrasting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fatty acyl-CoA reductase influences wax biosynthesis in the cotton mealybug, Phenacoccus solenopsis Tinsley

Tong

Wang

et al. 2022

Commun Biol

View full text Add to dashboard Cite

show abstract

“…The presence of epidermal glands is a common feature in Hemiptera, being reported for several families either belonging to Heteroptera (true bugs) (Roell et al, 2020) or Homoptera (psyllids, aphids, scales) (Chen & Qiao, 2012; Ammar et al, 2015, 2013). For these insects, the role of the secretion is very diverse, including sexual communication (aphids and scales) (Boullis & Verheggen, 2016; Tabata & Ichiki, 2016), repellence or self-defence (true bugs) (Lockwood & Story, 1987; Krall et al, 1999), as well as release of wax or other protective material (scales, mealybugs) (Foldi & Pearce, 1985; Ahmad et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Morpho-functional analysis of the head glands in three Auchenorrhyncha species and their possible biological significance

Sevarika

Giulio

Rondoni

et al. 2022

Preprint

View full text Add to dashboard Cite

The Cicadomorpha Philaenus spumarius, Neophilaenus campestris and Cicadella viridis are known transmitters of the bacterium Xylella fastidiosa. Here, we studied the ultrastructural organization of their cephalic glands. Our investigations with scanning, transmission, FIB-SEM electron microscope and light microscope revealed for the first time in Auchenorrhyncha the presence of two types of cephalic glands. Both belonged to the class III epidermal glands, according to Noirot and Quennedey classification. Type I glands were the most common, being mainly located around antennae, lorum and gena. Moreover, these glands were observed also on the abdomen and thorax, always in association with sensilla trichoidea. The second type of glands were located exclusively at the apical part of the postclypeus in P. spumarius and N. campestris. The ultrastructural organization was similar in both types, being composed of a secretory cell and a conducting canal. Differences were observed in the width of the cuticular opening, being smaller in the type II glands. In addition, we have recorded the presence of a maxillary sensory pit in all species and described sensilla trichoidea ultrastructural organization. Finally, we discussed the ultrastructural organization of the glands and their potential biological role.

show abstract

“…For these insects, the role of the secretion is very diverse, including sexual communication (aphids and scales) (Boullis & Verheggen, 2016;Tabata & Ichiki, 2016), repellence or self-defence (true bugs) (Lockwood & Story, 1987;Krall et al, 1999), as well as release of wax or other protective material (scales, mealybugs) (Foldi & Pearce, 1985;Ahmad et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Morpho-functional Analysis of the Head Glands in Three Auchenorrhyncha Species and Their Possible Biological Significance

Sevarika

Giulio²,

Rondoni³

et al. 2022

Microscopy and Microanalysis

View full text Add to dashboard Cite

The Cicadomorpha Philaenus spumarius, Neophilaenus campestris, and Cicadella viridis are known transmitters of the bacterium Xylella fastidiosa. Here, we studied the ultrastructural organization of their cephalic glands. Our investigations with scanning, transmission, focused ion beam-scanning electron microscopes and light microscope revealed for the first time in Auchenorrhyncha the presence of two types of cephalic glands. Both belonged to the Class III epidermal glands, according to the Noirot and Quennedey classification. Type A glands were the most common, being mainly located around antennae, lorum, and gena. Moreover, these glands were observed also on the abdomen and thorax, always in association with sensilla trichoidea. The second type of glands (type B) were located exclusively at the apical part of the postclypeus in P. spumarius and N. campestris. The ultrastructural organization was similar in both types, being composed of a secretory cell and a conducting canal. Differences were observed in the width of the cuticular opening, being smaller in the type II glands. In addition, we have recorded the presence of a maxillary sensory pit in all species and described sensilla trichoidea ultrastructural organization. Finally, we discussed the ultrastructural organization of the glands and their potential biological role.

show abstract

Wax glands ultrastructure and chemical composition of wax of giant mealybug Drosicha stebbingii (Green) (Hemiptera: Monophlebidae)

Cited by 6 publications

References 31 publications

Fatty acyl-CoA reductase influences wax biosynthesis in the cotton mealybug, Phenacoccus solenopsis Tinsley

Fatty acyl-CoA reductase influences wax biosynthesis in the cotton mealybug, Phenacoccus solenopsis Tinsley

Morpho-functional analysis of the head glands in three Auchenorrhyncha species and their possible biological significance

Morpho-functional Analysis of the Head Glands in Three Auchenorrhyncha Species and Their Possible Biological Significance

Contact Info

Product

Resources

About