Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Of or pertaining to
jasmonic acid or its derivatives, thejasmonates
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Production of a plant hormone called jasmonic acid is influenced when microRNAs inhibit certain regulators known as TCP transcription factors.
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However, when the scientist sprayed jasmonic acid directly on the flowers, nectar production increased dramatically.
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"The fact that jasmonic acid regulates so many functions, such as plant defense and pollination, is extremely interesting and raises new questions, especially concerning the evolution of these control mechanisms," says Martin Heil, the leader of the study.
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During her studies, a scientist from the Max Planck Institute for Chemical Ecology has discovered that the plant hormone jasmonic acid - known as a signalling molecule after herbivory - not only regulates flower development in the bud stage, but also triggers nectar production.
PhysOrg.com - latest science and technology news stories 2010
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If the substance was sprayed on young, still closed flower buds, however, their opening was inhibited, which confirms the importance of jasmonic acid also during the development of the flowers.
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Spraying jasmonic acid on the green leaves also did not have an impact on the production of nectar in the flowers.
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The correlation between the production of jasmonic acid and nectar accumulation was demonstrated in experiments with an inhibitor: if the flowers had been treated with an inhibitor of jasmonic acid synthesis, the so-called phenidone, nectar production failed.
PhysOrg.com - latest science and technology news stories 2010
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This clearly indicates that jasmonic acid has different functions in the different plant tissues: whereas the hormone activates defense mechanisms against herbivores in the leaves and the shoot of the plant, it regulates nectar production in the flower tissue.
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"When we put caterpillars on the rapeseed leaves to elicit jasmonic acid production, the nectar secretion of the flowers was not affected," the researcher says.
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The correlation between the production of jasmonic acid and nectar accumulation was demonstrated in experiments with an inhibitor: if the flowers had been treated with an inhibitor of jasmonic acid synthesis, the so-called phenidone, nectar production failed.
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