Cauline domatia of the ant-plant Humboldtia brunonis (Fabaceae)

Flora ◽  
2017 ◽  
Vol 236-237 ◽  
pp. 58-66 ◽  
Author(s):  
Joyshree Chanam ◽  
Renee M. Borges
Keyword(s):  
Humboldtia Brunonis

Composition of Extrafloral Nectar Influences Interactions between the Myrmecophyte Humboldtia brunonis and its Ant Associates

2012 ◽  
Vol 38 (1) ◽  
pp. 88-99 ◽  
Author(s):  
Megha Shenoy ◽  
Venkatesan Radhika ◽  
Suma Satish ◽  
Renee M. Borges
Keyword(s):  
Extrafloral Nectar ◽  
Humboldtia Brunonis

Context dependency of rewards and services in an Indian ant–plant interaction: southern sites favour the mutualism between plants and ants

2014 ◽  
Vol 30 (3) ◽  
pp. 219-229 ◽  
Author(s):  
Joyshree Chanam ◽  
Srinivasan Kasinathan ◽  
Gautam K. Pramanik ◽  
Amaraja Jagdeesh ◽  
Kanchan A. Joshi ◽  
...  
Keyword(s):  
Plant Traits ◽  
Fold Increase ◽  
Repeated Measurements ◽  
Context Dependency ◽  
Total Amino Acid ◽  
Real Spectrum ◽  
Extrafloral Nectary ◽  
Trait Variation ◽  
Southern Site ◽  
Humboldtia Brunonis

Abstract:Protection-based ant–plant mutualisms may vary in strength due to differences in ant rewards, abundance of protective ants and herbivory pressure. We investigated geographical and temporal variation in host plant traits and herbivory pressure at five sites spanning the distribution range of the myrmecophyteHumboldtia brunonis(Fabaceae) in the Indian Western Ghats. Southern sites had, on average, 2.4 times greater abundance of domatia-bearing individuals, 1.6 times greater extrafloral nectary numbers per leaf, 1.2 times larger extrafloral nectary sizes, 2.2 times greater extrafloral nectar (EFN) volumes and a two-fold increase in total amino acid and total sugar concentrations in EFN compared with northern sites. A strong protection-based mutualism with ants occurred at only one southern site where herbivory was highest, suggesting that investments in attracting ants correlate with anti-herbivore benefits gained from the presence of protective ants. Our results confirm a temporally stable north–south gradient in myrmecophytic traits in this ant-plant as several of these traits were re-sampled after a 5-y interval. However, the chemical composition of EFN varied at both spatial and short-term temporal scales suggesting that only repeated measurements of rewards such as EFN can reveal the real spectrum of trait variation in an ant–plant mutualistic system.

Lectotypification of Humboldtia brunonis (Fabaceae) and Notes on its Petal Numbers

2021 ◽  
Vol 58 (4-6) ◽  
Author(s):  
Maniruddin R. Dhabak ◽  
Mayur D. Nandikar
Keyword(s):  
Humboldtia Brunonis
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