Arabidopsis Leaf Trichomes as Acoustic Antennae

Liu, Shaobao; Jiao, Jiaojiao; Lu, Tian Jian; Xu, Feng; Pickard, Barbara G.; Genin, Guy M.

doi:10.1016/j.bpj.2017.07.035

Cited by 38 publications

(19 citation statements)

References 44 publications

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“…Zhou et al (2016) proposed that trichomes behave as an active mechanosensor, converting physical signals such as mechanical touch from insects into chemical signals like calcium oscillation and pH shift of skirt cells to elicit various defensive reactions. The mechanic stimuli could also be combined with vibrational stimulation of A. thaliana trichomes associated with feeding caterpillars (Liu et al 2017b).…”

Section: Other Functions Not Related To the Occurrence Of Phenolic Compounds In Trichomesmentioning

confidence: 99%

Protective and defensive roles of non-glandular trichomes against multiple stresses: structure–function coordination

et al. 2019

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As superficial structures, non-glandular trichomes, protect plant organs against multiple biotic and abiotic stresses. The protective and defensive roles of these epidermal appendages are crucial to developing organs and can be attributed to the excellent combination of suitable structural traits and chemical reinforcement in the form of phenolic compounds, primarily flavonoids. Both the formation of trichomes and the accumulation of phenolics are interrelated at the molecular level. During the early stages of development, non-glandular trichomes show strong morphological similarities to glandular ones such as the balloon-like apical cells with numerous phenolics. At later developmental stages, and during secondary wall thickening, phenolics are transferred to the cell walls of the trichomes. Due to the diffuse deposition of phenolics in the cell walls, trichomes provide protection against UV-B radiation by behaving as optical filters, screening out wavelengths that could damage sensitive tissues. Protection from strong visible radiation is also afforded by increased surface light reflectance. Moreover, the mixtures of trichome phenolics represent a superficial chemical barrier that provides protection against biotic stress factors such as herbivores and pathogens. Although the cells of some trichomes die at maturity, they can modulate their quantitative and qualitative characteristics during development, depending on the prevailing conditions of the external biotic or abiotic environment. In fact, the structure and chemical constituents of trichomes may change due to the particular light regime, herbivore damage, wounding, water stress, salinity and the presence of heavy metals. Hence, trichomes represent dynamic protective structures that may greatly affect the outcome of many plant–environment interactions.

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Section: Other Functions Not Related To the Occurrence Of Phenolic Compounds In Trichomesmentioning

confidence: 99%

Protective and defensive roles of non-glandular trichomes against multiple stresses: structure–function coordination

et al. 2019

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“…For instance, trichome geometry, orientation, and position could play a role in keeping predators at bay ( Salerno et al., 2018 ; Vermeij, 2015 ). An elegant modeling study recently showed that mechanosensitive trichomes that produce defensive compounds in response to vibrations specifically respond to acoustic waves produced by chewing caterpillars ( Liu et al., 2017 ). Interestingly, those trichomes tend to accumulate near leaf veins.…”

Section: Structural Patterns: Diversity Overview and Biological Functionsmentioning

confidence: 99%

Sculpting the surface: Structural patterning of plant epidermis

2021

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Summary Plant epidermis are multifunctional surfaces that directly affect how plants interact with animals or microorganisms and influence their ability to harvest or protect from abiotic factors. To do this, plants rely on minuscule structures that confer remarkable properties to their outer layer. These microscopic features emerge from the hierarchical organization of epidermal cells with various shapes and dimensions combined with different elaborations of the cuticle, a protective film that covers plant surfaces. Understanding the properties and functions of those tridimensional elements as well as disentangling the mechanisms that control their formation and spatial distribution warrant a multidisciplinary approach. Here we show how interdisciplinary efforts of coupling modern tools of experimental biology, physics, and chemistry with advanced computational modeling and state-of-the art microscopy are yielding broad new insights into the seemingly arcane patterning processes that sculpt the outer layer of plants.

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“…These structures were shown to act as acoustic antennae of plants responding to vibrations associated with the feeding of caterpillars. 45,46 Recent studies have confirmed that leaf trichomes do indeed recognize the caterpillar feeding vibrations which provide relevant cues for allowing plant recognition of herbivores. 47 Pickard summarized all her findings in 2011 in a new model of phyllotaxis involving waves of auxin fluxes and mechanosensory signaling in 2011.…”

Section: Textmentioning

confidence: 98%

Barbara G. Pickard - Queen of Plant Electrophysiology

Baluška

Mancuso

Volkenburgh

2021

Plant Signaling & Behavior

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Barbara Gillespie Pickard (1936-2019 studied plant electrophysiology and mechanosensory biology for more than 50 y. Her first papers on the roles of auxin in plant tropisms were coauthored with Kenneth V. Thimann. Later, she studied plant electrophysiology. She made it clear that plant action potentials are not a peculiar feature of so-called sensitive plants, but that all plants exhibit these fast electric signals. Barbara Gillespie Pickard proposed a neuronal model for the spreading of electric signals induced by mechanical stimuli across plant tissues. In later years, she studied the stretch-activated plasma membrane channels of plants and formulated the plasma-membrane control center model. Barbara Pickard summarized all her findings in a new model of phyllotaxis involving waves of auxin fluxes and mechano-sensory signaling.

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Arabidopsis Leaf Trichomes as Acoustic Antennae

Cited by 38 publications

References 44 publications

Protective and defensive roles of non-glandular trichomes against multiple stresses: structure–function coordination

Protective and defensive roles of non-glandular trichomes against multiple stresses: structure–function coordination

Sculpting the surface: Structural patterning of plant epidermis

Barbara G. Pickard - Queen of Plant Electrophysiology

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