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Author Yamawo, Akira ♦ Tokuda, Makoto ♦ Katayama, boru ♦ Yahara, Tetsukazu ♦ Tagawa, Jun
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Life sciences; biology
Subject Keyword Cost ♦ Defense tradeoff ♦ Extra-floral nectar ♦ Phenolics ♦ Plant–ant mutualism ♦ Evolutionary Biology ♦ Ecology ♦ Developmental Biology ♦ Human Genetics ♦ Animal Genetics and Genomics
Abstract In addition to direct defenses, some plant species provide extrafloral nectar (EF-nectar) and/or food bodies (lipid-rich particles) to attract ants for their own indirect defenses. To ascertain why such plants use indirect defenses, we investigated the respective costs of direct and indirect defenses of Mallotus japonicus seedlings grown with and without ants present. Mallotus japonicus plants growing with ants present (ant-present) secreted larger volumes of EF-nectar, containing greater amounts of sugars, as an indirect defense trait. These plants also showed chemical defensive traits, such as the number of pellucid dots and the amount of accumulated phenolics, to a lesser degree than plants without ants (ant-absent) did. Moreover, the ant-present plants grew faster. The estimated amounts of EF-nectar sugars and food bodies were small compared to the amount of phenolics. Plant biomass was correlated negatively with pellucid dot density and phenolic concentration. Plant height was correlated negatively with phenolic concentration. Moreover, leaf biomass was correlated negatively with trichome density. Taken together, these results suggest a tradeoff between the expression of direct defense traits and plant growth. Mallotus japonicus achieves more rapid growth with ants present. We propose that this occurs because these ants provide low-cost indirect defenses allowing plants to re-allocate their energy from direct defenses to growth instead. This mutual benefit apparently facilitates ant–plant defensive mutualism.
ISSN 00713260
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-02-15
Publisher Place Boston
e-ISSN 19342845
Journal Evolutionary Biology
Volume Number 42
Issue Number 2
Page Count 8
Starting Page 191
Ending Page 198


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Source: SpringerLink