scholarly journals Ethylene is a local modulator of jasmonate‐dependent phenolamide accumulation during Manduca sexta herbivory in Nicotiana attenuata

2020 ◽  
Author(s):  
Florent Figon ◽  
Ian T. Baldwin ◽  
Emmanuel Gaquerel
Keyword(s):  
Manduca Sexta ◽  
Nicotiana Attenuata

scholarly journals Hawkmoths evaluate scenting flowers with the tip of their proboscis

eLife ◽  
2016 ◽  
Vol 5 ◽  
Author(s):  
Alexander Haverkamp ◽  
Felipe Yon ◽  
Ian W Keesey ◽  
Christine Mißbach ◽  
Christopher Koenig ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Manduca Sexta ◽  
Ecosystem Service ◽  
Floral Scent ◽  
Nicotiana Attenuata ◽  
Floral Volatiles ◽  
Pollen Transfer ◽  
Olfactory Neurons ◽  
Molecular Analyses ◽  
Choice Tests

Pollination by insects is essential to many ecosystems. Previously, we have shown that floral scent is important to mediate pollen transfer between plants (<xref ref-type="bibr" rid="bib16">Kessler et al., 2015</xref>). Yet, the mechanisms by which pollinators evaluate volatiles of single flowers remained unclear. Here, Nicotiana attenuata plants, in which floral volatiles have been genetically silenced and its hawkmoth pollinator, Manduca sexta, were used in semi-natural tent and wind-tunnel assays to explore the function of floral scent. We found that floral scent functions to increase the fitness of individual flowers not only by increasing detectability but also by enhancing the pollinator's foraging efforts. Combining proboscis choice tests with neurophysiological, anatomical and molecular analyses we show that this effect is governed by newly discovered olfactory neurons on the tip of the moth's proboscis. With the tip of their tongue, pollinators assess the advertisement of individual flowers, an ability essential for maintaining this important ecosystem service.

scholarly journals Shifting Nicotiana attenuata 's diurnal rhythm does not alter its resistance to the specialist herbivore Manduca sexta

2016 ◽  
Vol 58 (7) ◽  
pp. 656-668 ◽  
Author(s):  
Jasmin Herden ◽  
Stefan Meldau ◽  
Sang-Gyu Kim ◽  
Grit Kunert ◽  
Youngsung Joo ◽  
...  
Keyword(s):  
Manduca Sexta ◽  
Diurnal Rhythm ◽  
Nicotiana Attenuata ◽  
Specialist Herbivore

scholarly journals Alternative Oxidase in Resistance to Biotic Stresses: Nicotiana attenuata AOX Contributes to Resistance to a Pathogen and a Piercing-Sucking Insect But Not Manduca sexta Larvae

2012 ◽  
Vol 160 (3) ◽  
pp. 1453-1467 ◽  
Author(s):  
Lu Zhang ◽  
Youngjoo Oh ◽  
Hongyu Li ◽  
Ian T. Baldwin ◽  
Ivan Galis
Keyword(s):  
Manduca Sexta ◽  
Alternative Oxidase ◽  
Nicotiana Attenuata ◽  
Biotic Stresses ◽  
Manduca Sexta Larvae

scholarly journals Variation in Manduca sexta Pollination-Related Floral Traits and Reproduction in a Wild Tobacco Plant

2021 ◽  
Vol 9 ◽  
Author(s):  
Julia Bing ◽  
Xiang Li ◽  
Alexander Haverkamp ◽  
Ian T. Baldwin ◽  
Bill S. Hansson ◽  
...  
Keyword(s):  
Manduca Sexta ◽  
Seed Set ◽  
Tobacco Plant ◽  
The Other ◽  
Floral Traits ◽  
Nicotiana Attenuata ◽  
Pollination Syndromes ◽  
Pollination Services ◽  
Flower Opening ◽  
Local Adaptations

Most flowering plants depend on animal pollination for successful sexual reproduction. Floral signals such as color, shape, and odor are crucial in establishing this (often mutualistic) interaction. Plant and pollinator phenotypes can vary temporally but also spatially, thus creating mosaic-like patterns of local adaptations. Here, we investigated natural variation in floral morphology, flower volatile emission, and phenology in four accessions of a self-compatible wild tobacco, Nicotiana attenuata, to assess how these traits match the sensory perception of a known pollinator, the hawkmoth Manduca sexta. These accessions differ in floral traits and also in their habitat altitudes. Based on habitat temperatures, the accession occurring at the highest altitude (California) is less likely to be visited by M. sexta, while the others (Arizona, Utah 1, and Utah 2) are known to receive M. sexta pollinations. The accessions varied significantly in flower morphologies, volatile emissions, flower opening, and phenology, traits likely important for M. sexta perception and floral handling. In wind tunnel assays, we assessed the seed set of emasculated flowers after M. sexta visitation and of natural selfed and hand-pollinated selfed flowers. After moth visitations, plants of two accessions (Arizona and Utah 2) produced more capsules than the other two, consistent with predictions that accessions co-occurring with M. sexta would benefit more from the pollination services of this moth. We quantified flower and capsule production in four accessions in a glasshouse assay without pollinators to assess the potential for self-pollination. The two Utah accessions set significantly more seeds after pollen supplementation compared with those of autonomous selfing flowers, suggesting a greater opportunistic benefit from efficient pollinators than the other two. Moreover, emasculated flowers of the accession with the most exposed stigma (Utah 2) produced the greatest seed set after M. sexta visitation. This study reveals intraspecific variation in pollination syndromes that illuminate the potential of a plant species to adapt to local pollinator communities, changing environments, and altered pollination networks.

scholarly journals Moths sense, but do not learn flower odors with their proboscis during flower investigation

2021 ◽  
Author(s):  
Elisabeth Adam ◽  
Bill S. Hansson ◽  
Markus Knaden
Keyword(s):  
Manduca Sexta ◽  
Cross Talk ◽  
Olfactory Learning ◽  
Foraging Efficiency ◽  
Nicotiana Attenuata ◽  
Olfactory Sensilla ◽  
Artificial Flower ◽  
Odor Learning ◽  
Insect Pollinators ◽  
Flower Handling

Insect pollinators, like the tobacco hawkmoth Manduca sexta, are known for locating flowers and learning floral odors by using their antennae. A recent study revealed, however, that the tobacco hawkmoth additionally possesses olfactory sensilla at the tip of its proboscis. Here, we ask whether this second “nose” of the hawkmoth is similarly involved in odor learning as are the antennae. We first show that Manduca foraging efficiency at Nicotiana attenuata flowers increases with experience. This raises the question whether olfactory learning with the proboscis is playing a role during flower handling. By rewarding the moths at an artificial flower, we show that – while moths learn an odor easily when they perceive it with their antennae – experiencing the odor just with the proboscis is not sufficient for odor learning. Furthermore, experiencing the odor with the antennae during training does not affect the behavior of the moths when they later can detect the learned odor with the proboscis only. Therefore, there seems to be no cross-talk between antennae and proboscis and information learnt by the antennae cannot be retrieved by the proboscis.

scholarly journals A Comparison of Two Nicotiana attenuata Accessions Reveals Large Differences in Signaling Induced by Oral Secretions of the Specialist Herbivore Manduca sexta

2008 ◽  
Vol 146 (3) ◽  
pp. 927-939 ◽  
Author(s):  
Jianqiang Wu ◽  
Christian Hettenhausen ◽  
Meredith C. Schuman ◽  
Ian T. Baldwin
Keyword(s):  
Manduca Sexta ◽  
Nicotiana Attenuata ◽  
Oral Secretions ◽  
Specialist Herbivore

scholarly journals Digestive Duet: Midgut Digestive Proteinases of Manduca sexta Ingesting Nicotiana attenuata with Manipulated Trypsin Proteinase Inhibitor Expression

PLoS ONE ◽  
2008 ◽  
Vol 3 (4) ◽  
pp. e2008 ◽  
Author(s):  
Jorge A. Zavala ◽  
Ashok P. Giri ◽  
Maarten A. Jongsma ◽  
Ian T. Baldwin
Keyword(s):  
Manduca Sexta ◽  
Proteinase Inhibitor ◽  
Nicotiana Attenuata ◽  
Digestive Proteinases ◽  
Trypsin Proteinase Inhibitor

Instar-specific sensitivity of specialist Manduca sexta larvae to induced defences in their host plant Nicotiana attenuata

2001 ◽  
Vol 26 (6) ◽  
pp. 578-586 ◽  
Author(s):  
Nicole M. Van Dam ◽  
Uta Hermenau ◽  
Ian T. Baldwin
Keyword(s):  
Host Plant ◽  
Manduca Sexta ◽  
Nicotiana Attenuata ◽  
Specific Sensitivity ◽  
Induced Defences ◽  
Manduca Sexta Larvae

A New Acyclic Diterpene Glycoside from Nicotiana attenuata with a Mild Deterrent Effect on Feeding Manduca sexta Larvae

2006 ◽  
Vol 61 (9) ◽  
pp. 1138-1142 ◽  
Author(s):  
Amir Reza Jassbi ◽  
Simin Zamanizadehnajari ◽  
Danny Kessler ◽  
Ian T. Baldwin
Keyword(s):  
Manduca Sexta ◽  
2D Nmr ◽  
Deterrent Effect ◽  
Nicotiana Attenuata ◽  
2D Nmr Spectroscopy ◽  
Aerial Parts ◽  
Bioassay Guided Fractionation ◽  
Manduca Sexta Larvae ◽  
Apci Mass Spectrometry

Abstract To investigate the role of secondary metabolites in the feeding behavior of Manduca sexta larvae feeding on Nicotiana attenuata, an aqueous acetone extract of the aerial parts of the plant was subjected to feeding-performance bioassay-guided fractionation. We isolated three 20- hydroxygeranyllinalool glycosides from the leaves of N. attenuata, which acted as mild deterrents to the feeding herbivore M. sexta. One of the diterpenoid glycosides, attenoside (3), is a novel natural product. The structures of the compounds were determined using APCI mass spectrometry and 1- and 2D-NMR spectroscopy.

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