Fine structure of the galeal styloconic sensilla of larval Lymantria dispar (Lepidoptera: Lymantriidae).
Fine structure of the galeal styloconic sensilla of larval Lymantria dispar (Lepidoptera: Lymantriidae).
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DOI：
10.1603/008.102.0621
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发表时间：
2009-11-01
影响因子：
2.3
通讯作者：
Shields VD
中科院分区：
文献类型：
--
作者：
Shields VD
鳞翅目幼虫有两对柱锥感器，位于上颚盔状突上。这些感器，即外侧和内侧茎锥感器，每个都由插入花柱的较小的圆锥体组成。它们被认为在寄主植物选择中起重要作用，是参与取食的主要器官。对舞毒蛾五龄幼虫感器的超微结构进行了观察。幼虫显示它们每个约70 μ m长和30 μ m宽。每个感器由一个插入大花柱插座的单一感觉钉组成。每个钉承担轻微的近顶端的终端孔平均317 nm的外侧和179 nm的内侧感器。每个感器容纳五个双极神经元。每个神经元的近端树突段产生不分支的远端树突段。四个这些树突附近的孔下方的感器的尖端终止，并承担与接触化学感器的超微结构特征一致。第五远侧树突终止于钉的基部附近，并具有与机械感受器一致的超微结构特征。因此，这些感器每个都具有双峰化学机械感觉功能。远端树突位于树突通道内，并被树突鞘包围。中间鞘细胞和外鞘细胞包围着一个大的感觉窦，而较小的睫状窦则被内细胞包围。神经元依次被内鞘细胞、中间鞘细胞和外鞘细胞包裹。
Lepidopteran larvae possess two pairs of styloconic sensilla located on the maxillary galea. These sensilla, namely the lateral and medial styloconic sensilla, are each comprised of a smaller cone, which is inserted into a style. They are thought to play an important role in host-plant selection and are the main organs involved in feeding. Ultrastructural examination of these sensilla of fifth instar Lymantria dispar (L.) larvae reveal that they are each approximately 70 um in length and 30 um in width. Each sensillum consists of a single sensory peg inserted into the socket of a large style. Each peg bears a slightly subapical terminal pore averaging 317 nm in lateral and 179 nm in medial sensilla. Each sensillum houses five bipolar neurons. The proximal dendritic segment of each neuron gives rise to an unbranched distal dendritic segment. Four of these dendrites terminate near the tip of the sensillum below the pore and bear ultrastructural features consistent with contact chemosensilla. The fifth distal dendrite terminates near the base of the peg and bears ultrastructural features consistent with mechanosensilla. Thus, these sensilla each bear a bimodal chemo-mechanosensory function. The distal dendrites lie within the dendritic channel and are enclosed by a dendritic sheath. The intermediate and outer sheath cells enclose a large sensillar sinus, whereas the smaller ciliary sinus is enclosed by the inner cell. The neurons are ensheathed successively by the inner, intermediate, and outer sheath cells.
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影响因子：
1.5
作者：
SCHAFER, R;SANCHEZ, TV
通讯作者：
SANCHEZ, TV
影响因子：
3.8
作者：
DEVINE, D
通讯作者：
DEVINE, D
DOI：
10.1098/rstb.1995.0036
发表时间：
1995-03-29
影响因子：
6.3
作者：
SHIELDS, VDC;MITCHELL, BK
通讯作者：
MITCHELL, BK
影响因子：
2.3
作者：
Gullan, PJ;Downie, DA;Steffan, SA
通讯作者：
Steffan, SA
影响因子：
1.4
作者：
SCOTT, DA;ZACHARUK, RY
通讯作者：
ZACHARUK, RY