benzyl acetone/tabakas

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RNAi-mediated silencing of the HD-Zip gene HD20 in Nicotiana attenuata affects benzyl acetone emission from corollas via ABA levels and the expression of metabolic genes.

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BACKGROUND The N. attenuata HD20 gene belongs to the homeodomain-leucine zipper (HD-Zip) type I family of transcription factors and it has been previously associated with the regulation of ABA accumulation in leaves and the emission of benzyl acetone (BA; 4-phenyl-2-butanone) from night flowers. In

Ecophysiological comparison of direct and indirect defenses in Nicotiana attenuata.

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After herbivore attack, plants launch a suite of direct and indirect defense responses that must be coordinated if plants are to realize a fitness benefit from these responses. Here we characterize the volatile emissions in the native tobacco plant, Nicotiana attenuata Torr. ex Wats., that are

Evolution of a novel and adaptive floral scent in wild tobacco.

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Many plants emit diverse floral scents that mediate plant-environment interactions and attain reproductive success. However, how plants evolve biosynthesis of novel and adaptive floral volatiles remains unclear. Here, we show that in the wild tobacco, Nicotiana attenuata, a dominant species-specific

Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers.

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The rhythmic opening/closing and volatile emissions of flowers are known to attract pollinators at specific times. That these rhythms are maintained under constant light or dark conditions suggests a circadian clock involvement. Although a forward and reverse genetic approach has led to the

The chemistry of defense and apparency in the corollas ofNicotiana attenuata.

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The morphological and chemical characteristics of flowers which attract pollinators present a dilemma for plants; advertising may increase the "apparency" of plants to their predators and some pollinators are also predators. We explore how a self-compatible disturbance species,Nicotiana attenuata,

Jasmonate signaling makes flowers attractive to pollinators and repellant to florivores in nature.

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Flowers are required for the Darwinian fitness of flowering plants, but flowers' advertisements for pollination services can attract florivores. Previous glasshouse work with Nicotiana attenuata revealed the role of jasmonate (JA) signaling in flower development, advertisement and defense. However,

Changing pollinators as a means of escaping herbivores.

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All animal-pollinated plants must solve the problem of attracting pollinators while remaining inconspicuous to herbivores, a dilemma exacerbated when voracious larval-stage herbivores mature into important pollinators for a plant [1]. Herbivory is known to alter pollination rates, by altering flower

Field experiments with transformed plants reveal the sense of floral scents.

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Plants use many means to attract pollinators, including visual cues and odor. We investigated how nonpigment floral chemistry influences nectar removal, floral visitation, florivory, rates of outcrossing, and fitness through both male and female functions. We blocked expression of biosynthetic genes

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