scholarly journals Micro-organisms behind the pollination scenes: microbial imprint on floral nectar sugar variation in a tropical plant community

2012 ◽  
Vol 110 (6) ◽  
pp. 1173-1183 ◽  
Author(s):  
A. Canto ◽  
C. M. Herrera
Keyword(s):  
Plant Community ◽  
Floral Nectar ◽  
Tropical Plant ◽  
Nectar Sugar ◽  
Micro Organisms

scholarly journals Seed polyphenols in a diverse tropical plant community

2017 ◽  
Vol 106 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Sofia Gripenberg ◽  
Jadranka Rota ◽  
Jorma Kim ◽  
S. Joseph Wright ◽  
Nancy C. Garwood ◽  
...  
Keyword(s):  
Plant Community ◽  
Tropical Plant

scholarly journals Salvage of floral resources through re-absorption before flower abscission

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Graham H. Pyke ◽  
Zong-Xin Ren ◽  
Judith Trunschke ◽  
Klaus Lunau ◽  
Hong Wang
Keyword(s):  
Floral Resources ◽  
Floral Nectar ◽  
Nectar Volume ◽  
Flower Colours ◽  
Nectar Concentration ◽  
Nectar Sugar ◽  
Biochemical Mechanisms ◽  
Floral Resource ◽  
Almost All

Abstract Plants invest floral resources, including nectar and pigment, with likely consequent reproductive costs. We hypothesized that plants, whose flowers abscise with age, reabsorb nectar and pigment before abscission. This was tested with flowers of Rhododendron decorum, which has large, conspicuous white flowers that increasingly abscise corollas as flowers age. As this species is pollinated by bees, we also hypothesized that nectar concentration would be relatively high (i.e., > 30% wt/vol) and petals would contain UV-absorbing pigment. Floral nectar volume and concentration were sampled on successive days until abscission (up to ten days old, peak at five days) and for sub-sample of four-day-old flowers. Flowers just abscised were similarly sampled. Flower colours were measured using a modified camera, with recordings of spectral reflectance for abscised and open non-abscised flowers. Pigment content was summed values of red, green, blue channels of false color photos. As expected, flowers reabsorbed almost all nectar before abscission, separately reabsorbing nectar-sugar and nectar-water, and petals contained UV-absorbing pigment. However, flowers did not reabsorb pigment and nectar-concentration was < 30% wt/vol. That flowers reabsorb nectar, not pigment, remains unexplained, though possibly pigment reabsorption is uneconomical. Understanding floral resource reabsorption therefore requires determination of biochemical mechanisms, plus costs/benefits for individual plants.

scholarly journals Nectar-living yeasts of a tropical host plant community: diversity and effects on community-wide floral nectar traits

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3517 ◽  
Author(s):  
Azucena Canto ◽  
Carlos M. Herrera ◽  
Rosalina Rodriguez
Keyword(s):  
Yeast Cell ◽  
Host Plant ◽  
Cell Density ◽  
Plant Community ◽  
Host Plants ◽  
Common Species ◽  
Life Forms ◽  
Community Diversity ◽  
Floral Nectar ◽  
Key Factor

We characterize the diversity of nectar-living yeasts of a tropical host plant community at different hierarchical sampling levels, measure the associations between yeasts and nectariferous plants, and measure the effect of yeasts on nectar traits. Using a series of hierarchically nested sampling units, we extracted nectar from an assemblage of host plants that were representative of the diversity of life forms, flower shapes, and pollinator types in the tropical area of Yucatan, Mexico. Yeasts were isolated from single nectar samples; their DNA was identified, the yeast cell density was estimated, and the sugar composition and concentration of nectar were quantified using HPLC. In contrast to previous studies from temperate regions, the diversity of nectar-living yeasts in the plant community was characterized by a relatively high number of equally common species with low dominance. Analyses predict highly diverse nectar yeast communities in a relatively narrow range of tropical vegetation, suggesting that the diversity of yeasts will increase as the number of sampling units increases at the level of the species, genera, and botanical families of the hosts. Significant associations between specific yeast species and host plants were also detected; the interaction between yeasts and host plants impacted the effect of yeast cell density on nectar sugars. This study provides an overall picture of the diversity of nectar-living yeasts in tropical host plants and suggests that the key factor that affects the community-wide patterns of nectar traits is not nectar chemistry, but rather the type of yeasts interacting with host plants.

Explaining variation in tropical plant community composition: influence of environmental and spatial data quality

Oecologia ◽  
2007 ◽  
Vol 155 (3) ◽  
pp. 593-604 ◽  
Author(s):  
Mirkka M. Jones ◽  
Hanna Tuomisto ◽  
Daniel Borcard ◽  
Pierre Legendre ◽  
David B. Clark ◽  
...  
Keyword(s):  
Data Quality ◽  
Community Composition ◽  
Plant Community ◽  
Spatial Data ◽  
Plant Community Composition ◽  
Tropical Plant ◽  
Spatial Data Quality

Floral Nectar Sugar Compositions of Some South and Southeast Asian Species

Biotropica ◽  
1991 ◽  
Vol 23 (4) ◽  
pp. 568 ◽  
Author(s):  
C. Edward Freeman ◽  
Richard D. Worthington ◽  
Margaret S. Jackson
Keyword(s):  
Southeast Asian ◽  
Floral Nectar ◽  
Asian Species ◽  
Nectar Sugar
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