Induction of phlorotannin production in a brown alga: defense or resource dynamics?
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چکیده
منابع مشابه
Induction of phlorotannin production in a brown alga: defense or resource dynamics?
Increase of phenolic secondary metabolites, phlorotannins, in brown algae due to gastropod grazing has been interpreted as an anti-herbivore adaptation. Here we tested whether such a response could be due to changes in truly available resources for the alga, not by the grazing activity of snails as such. We allowed two species of snails, Theodoxus flu iatilis and Physa fontinalis to graze on Fu...
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A new phlorotannin, named eckstolonol (1), was isolated from the EtOAc soluble fraction of the methanolic extract of the brown alga, Ecklonia stolonifera OKAMURA, along with three known phlorotannins, eckol (2), phlorofucofuroeckol A (3), and dieckol (4). The structure of eckstolonol was identified as 5,8,13,14-tetraoxa-pentaphene-1,3,6,9,11-pentaol on the basis of spectroscopic evidence. The n...
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Inducible resistance in plants is a defense strategy for avoiding the negative consequences of herbivory on plant fitness. Since resistance is costly, the induction of resistance may depend on resource availability. Resource-based plant–herbivore hypotheses predict that the cost of producing carbon-based defensive metabolites will be higher when an excess of nutrients is available for growth. W...
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A role as UV sunscreens has been suggested for phlorotannins, the phenolic compounds that accumulate in brown algae in response to a number of external stimuli and take part in cell wall structure. After exposure of the intertidal brown alga Fucus vesiculosus to artificial UV-B radiation, we examined its physiological responses by following the transcript level of the pksIII gene encoding a phl...
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Adventitious branches are produced following lnjury in at least 5 specles of brown algae in the family Fucaceae. Field experiments showed that these structures can be induced in the intertidal brown alga Fucus distichus by mechanical damage to the plant apices. The mean number of adventitous branches on F. distichus and the percent of plants with adventitious branches was positively correlated ...
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ژورنال
عنوان ژورنال: Oikos
سال: 2003
ISSN: 0030-1299,1600-0706
DOI: 10.1034/j.1600-0706.2003.12635.x