Linked Life Data

16632610

Source:http://linkedlifedata.com/resource/pubmed/id/16632610

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2006-5-3
pubmed:abstractText
Far-red radiation (FR) reflected by green tissues is a key signal that plants use to detect the proximity of future competitors. Perception of increased levels of FR elicits a suite of responses collectively known as the shade-avoidance syndrome, which includes increased stem elongation, production of erect leaves, and reduced lateral branching. These responses improve the access to light for plants that occur in crowded populations. Responses to the proximity of competitors are known to affect the susceptibility to disease and predation in several organisms, including social animals. However, the impacts of warning signals of competition on the expression of defenses have not been explicitly investigated in plants. In the experiments reported here, we show that reflected FR induced a dramatic down-regulation of chemical defenses in wild tobacco (Nicotiana longiflora). FR altered the expression of several defense-related genes, inhibited the accumulation of herbivore-induced phenolic compounds, and augmented the performance of the specialist herbivore Manduca sexta. Complementary studies with tomato suggested that the effects of FR on defenses are mediated by the photoreceptor phytochrome B. The central implication of these results is that shade-intolerant species such as wild tobacco and tomato activate functional changes that affect their ability to cope with herbivore attack in response to phytochrome signals of future competition, even in the absence of real competition for resources. These findings suggest that competition overshadowed herbivory during the evolution of this group of species and add a new axis to the definition of the shade-avoidance syndrome.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-10631255, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-11069708, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-11299398, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-11513627, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-12100485, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-12815435, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-12913133, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-14668869, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-14749516, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-14757829, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-15016565, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-15125770, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-15448197, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-15829513, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-15860617, http://linkedlifedata.com/resource/pubmed/commentcorrection/16632610-16461381
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
103
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7170-4
pubmed:dateRevised
2010-9-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Remote sensing of future competitors: impacts on plant defenses.
pubmed:affiliation
Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura, Consejo Nacional de Investigaciones Científicas y Técnicas, and Universidad de Buenos Aires, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't