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| 桉树枝瘿姬小蜂胚胎发育及胚后发育 | |
| 引用本文： | 关月姗,朱方丽,杨仪韩,曹惠怡,严玉宁,王兴民. 桉树枝瘿姬小蜂胚胎发育及胚后发育[J]. 昆虫学报, 2022, 65(7): 905-911. DOI: 10.16380/j.kcxb.2022.07.012 |
| 作者姓名： | 关月姗 朱方丽 杨仪韩 曹惠怡 严玉宁 王兴民 |
| 作者单位： | (1. 华南农业大学植物保护学院昆虫系, 生物防治教育部工程研究中心, 广州 510642; 2. 常州市房屋安全和白蚁防治指导中心, 江苏常州 213000; 3. 青海高等职业技术学院农业与资源环境系, 青海海东 810700) |
| 基金项目： | 广州市科技计划重点项目(201804020070)；;广东省科技计划项目(2017A020208060)； |
| 摘 要： | 【目的】对桉属树木的重要害虫桉树枝瘿姬小蜂Leptocybe invasa胚胎发育及胚后发育生物学特征进行详细调查，以期深入了解该害虫的生物学特征及发生为害规律。【方法】对桉树枝瘿姬小蜂雌性生殖系统、卵、虫瘿进行解剖，观察其胚胎发育和胚后发育过程，测量其各发育阶段的虫瘿、虫室和幼体的体积及薄壁细胞层的厚度。【结果】桉树枝瘿姬小蜂完成胚胎发育约需138 h，由3个阶段组成：产卵后0-24 h为营养物质聚集期；36-84 h为胚胎期；96-138 h为孵化期。桉树枝瘿姬小蜂在虫瘿内完成发育，其发育过程与虫瘿发育过程保持一致。虫瘿结构由3个基本层组成，由外至内分别为表皮层、中间层和薄壁细胞层。桉树枝瘿姬小蜂幼虫体积增长速率随发育时间呈现单峰型，在30 d时增长速率达到最大；虫瘿体积的增长速率呈抛物线状，并且虫瘿内薄壁细胞层厚度随发育时间也呈现抛物线状，其前期增长较快，后期下降变缓。【结论】桉树枝瘿姬小蜂发育至25 d时处于取食量较小的低龄阶段，而虫瘿内薄壁细胞层(食物)厚度已达到最大，为幼虫体积快速增大阶段作好准备。 |
| 关 键 词： | 桉树枝瘿姬小蜂 胚胎发育 胚后发育 虫瘿 薄壁细胞 |
Embryonic and postembryonic development of Leptocybe invasa (Hymenoptera: Eulophidae) |
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| GUAN Yue-Shan,ZHU Fang-Li,YANG Yi-Han,CAO Hui-Yi,YAN Yu-Ning,WANG Xing-Min. Embryonic and postembryonic development of Leptocybe invasa (Hymenoptera: Eulophidae)[J]. Acta Entomologica Sinica, 2022, 65(7): 905-911. DOI: 10.16380/j.kcxb.2022.07.012 | |
| Authors: | GUAN Yue-Shan ZHU Fang-Li YANG Yi-Han CAO Hui-Yi YAN Yu-Ning WANG Xing-Min |
| Affiliation: | (1. Engineering Research Center of Biological Control, Ministry of Education, Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China; 2. Changzhou House Safety and Termite Control Instruction Center, Changzhou, Jiangsu 213000, China; 3. Department of Agriculture and Resources and Environment, Qinghai Higher Vocational and Technical Institute, Haidong, Qinghai 810700, China) |
| Abstract: | 【Aim】 Leptocybe invasa is an important pest of eucalyptus trees. This studyims to investigate the embryonic and postembryonic development of L. invasa so as tounderstand its biological characteristics and occurrence and infestation rules. 【Methods】The female reproductive system, eggs and galls of L. invasa were dissected, its embryonicand postembryonic development were observed, and the volumes of the galls, chambers andlarvae as well as the thickness of the parenchyma cell layer were measured at eachdevelopmental stage. 【Results】 The embryonic development of L. invasa is completed in 138h, including three stages: the period of nutrition accumulation after egg laying (0-24 h),the embryonic stage (36-84 h), and the hatching stage (96-138 h). The developmental processof L. invasa in galls is consistent with that of the galls. The gall structure is composedof three basic layers including epidermal layer, mesenchymal layer and parenchyma celllayer from the outer side to the inner side. The increase rate of the larval volume of L.invasa showed a unimodal change trend with the time of development, and reached the maximumat 30 d. The increase rate of the gall showed a parabola-shaped change trend and thethickness of the parenchyma cell layer of the galls also showed a parabola-shaped changetrend (increased rapidly in the early stage and decreased slowly in the later stage) withthe time of development. 【Conclusion】 At the age of 25 d, L. invasa larva is still at theearly instar with low food intake, but the thickness of the parenchyma cell layer (food) inthe gall reached the maximum, which is prepared for the rapid growth of larva. |
| Keywords: | Leptocybe invasa,embryonic development,postembryonic development,gall parenchyma cells, |
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