Morphology of Mouthparts and Distribution of Sensilla in Immature Stages and Adults of Parthenium Beetles.

IF 2.9 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Priyanka Yadav, Arvind Kumar Patel, Desh Deepak Chaudhary, Bhupendra Kumar
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Abstract

The Parthenium beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is a notable biocontrol agent against invasive Parthenium weed in Australia, South Africa, and the Indian subcontinent. While larvae consume both inflorescences and leaves, and adults feed exclusively on leaves, no prior study has compared the mouthparts of Z. bicolorata larvae and adults. Present study utilized scanning electron microscopy to investigate the morphology and distribution of sensilla on mouthparts of fourth-instar larvae, pupae, and adults. Our results revealed that fourth-instar larvae had 9-different sensillum types: sensilla chaetica (Sch I-III), sensilla basiconica (Sb I-V), and sensilla digitiformia (Ds) on their mouthparts, whereas pupal sensilla were fewer and less distinct. In adults, 13-different sensillum types were present: sensilla chaetica (Sch I-III) on labrum, labium, mandibles, and maxillae; sensilla basiconica (Sb I-VI) on labium, epipharyx, lacinia, maxillary palps, and labial palps; sensilla digitiformia (Ds) on maxillary palps; and sensilla campaniformia (Sca), and sensilla coeloconica (Sco I-II) on epipharyx. These sensilla likely play vital roles in feeding behavior, sensory perception, and host plant detection. Our findings provide a microscopic morphological foundation for further research on food recognition mechanisms and local adaptations in specialist phytophagous insects.

幼虫和成虫口器形态及感受器分布。
Parthenium beetle, Zygogramma bicolorata Pallister(鞘翅目:金甲科)是澳大利亚、南非和印度次大陆的一种重要的防虫剂。虽然幼虫既吃花序也吃叶子,而成虫只吃叶子,但之前没有研究对双色瓢虫幼虫和成虫的口器进行比较。本研究利用扫描电子显微镜研究了四龄幼虫、蛹和成虫口器上感受器的形态和分布。结果表明,四龄幼虫口器上有9种不同的感受器类型:chaetica (Sch I-III)、basiconica (Sb I-V)和digitalformia (Ds),而蛹感受器较少且不明显。在成人中,存在13种不同类型的感受器:在唇、唇、下颌骨和上颌骨上的chaetica感受器(Sch - iii);基本感受器(sbi - vi)分布于唇、上睑、唇突、上颌和唇瓣;上颌触须上的数字感器(Ds);和感受器钟形感受器(Sca),和感受器coeloconica (Sco I-II)。这些感受器可能在摄食行为、感觉知觉和寄主植物检测中起着至关重要的作用。本研究结果为进一步研究特殊植食昆虫的食物识别机制和局部适应性提供了微观形态学基础。
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来源期刊
Microscopy and Microanalysis
Microscopy and Microanalysis 工程技术-材料科学:综合
CiteScore
1.10
自引率
10.70%
发文量
1391
审稿时长
6 months
期刊介绍: Microscopy and Microanalysis publishes original research papers in the fields of microscopy, imaging, and compositional analysis. This distinguished international forum is intended for microscopists in both biology and materials science. The journal provides significant articles that describe new and existing techniques and instrumentation, as well as the applications of these to the imaging and analysis of microstructure. Microscopy and Microanalysis also includes review articles, letters to the editor, and book reviews.
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