Phenotypic Selection on Flowering Phenology in Senecio integrifolius, a Perennial Herb

Oikos ◽  
1991 ◽  
Vol 61 (2) ◽  
pp. 205 ◽  
Author(s):  
Björn Widén ◽  
Bjorn Widen
Keyword(s):  
Phenotypic Selection ◽  
Flowering Phenology ◽  
Perennial Herb

scholarly journals Reproductive biology of Ophiorrhiza caudata C.E.C.Fisch. (Rubiaceae), an endemic and endangered creeping perennial herb of the Western Ghats, India

2021 ◽  
Vol 13 (13) ◽  
pp. 20056-20065
Author(s):  
Maria Theresa ◽  
Appukuttan Kamalabai Sreekala ◽  
Jayalakshmi Mohanlal
Keyword(s):  
Seedling Establishment ◽  
Fruit Set ◽  
Floral Morphology ◽  
Climatic Factors ◽  
Monsoon Season ◽  
Natural Habitat ◽  
Flowering Phenology ◽  
Perennial Herb ◽  
In The Wild ◽  
The Western Ghats

Ophiorrhiza caudata is a creeping, perennial herb distributed along wet and shady areas. The species is distylous with two distinct floral morphs: pin and thrum. Flowering usually occurs during the monsoon season. No particular difference was noticed in the flowering phenology of the two morphs. Presently the species is self-incompatible, however, it shows a tendency towards intramorph compatibility. Fruit set is above 60% in open pollination and intermorph pollination. Bees and butterflies are the major pollinators. The pollen flow between the two floral morphs varies depending upon floral morphology and pollinators. Fruit is a bi-valved capsule which dehisces by a splashing drop mechanism. The seeds are very minute. The rate of seed germination and seedling establishment in the wild condition is very poor due to adverse climatic factors. Ophiorrhiza caudata is struggling for survival in its natural habitat, where habitat fragmentation, climatic factors and poor seedling establishment could account for its narrow distribution.

Environmental and genetic influences on phenology and plant size in a perennial herb, Senecio integrifolius

1991 ◽  
Vol 69 (1) ◽  
pp. 209-217 ◽  
Author(s):  
Björn Widén
Keyword(s):  
Natural Population ◽  
Rank Order ◽  
Natural Populations ◽  
Flowering Phenology ◽  
Plant Size ◽  
Genetic Influences ◽  
Perennial Herb ◽  
Cultivated Plants ◽  
Mother Plants ◽  
Progeny Size

Individual plants of the perennial herb Senecio integrifolius showed a highly significant correlation between rank order of the dates of first flowering and of first fruiting in a natural population and in cultivation. Plants exposed to full sunshine were smaller and flowered earlier than shaded plants both in a natural population and in cultivation. Within the two groups, plants with large inflorescences started to flower first. Duration of flowering was regulated by the size of the inflorescence; plants with many heads flowered longer than plants with few heads. There was a significant correlation between phenological rank order of mother plants in natural populations and their progenies in cultivation, but no consistent relationship between mother size and progeny size was found. Cultivated plants were consistent in rank order of flowering and in size over the years. Key words: flowering phenology, plant size, genetic variation, Senecio.

Flowering phenology of a widespread perennial herb shows contrasting responses to global warming between humid and non‐humid regions

2020 ◽  
Vol 34 (9) ◽  
pp. 1870-1881
Author(s):  
Zhuqiu Song ◽  
Yongshuo H. Fu ◽  
Yanjun Du ◽  
Lin Li ◽  
Xuejun Ouyang ◽  
...  
Keyword(s):  
Global Warming ◽  
Flowering Phenology ◽  
Perennial Herb

scholarly journals Simultaneous selection on vegetative and reproductive phenology in a perennial herb

2021 ◽  
Author(s):  
Elsa Fogelström ◽  
Giulia Zacchello ◽  
Johan Ehrlen
Keyword(s):  
Phenotypic Selection ◽  
Early Flowering ◽  
Perennial Herb ◽  
Direct Selection ◽  
Reproductive Phenology ◽  
Single Event ◽  
Simultaneous Selection ◽  
Selection For ◽  
Lathyrus Vernus ◽  
Temporally Correlated

The timing of different life history events are often correlated, and selection might only rarely be exerted independently on the timing of a single event. In plants, phenotypic selection has often been shown to favour earlier flowering. However, little is known about to what extent this selection acts directly vs. indirectly via vegetative phenology, and if selection on the two traits is correlational. We estimated direct, indirect and correlational phenotypic selection on vegetative and reproductive phenology over three years for the perennial herb Lathyrus vernus. Direct selection favoured earlier flowering and shorter timespans between leaf-out and flowering in all years. However, early flowering was associated with early leaf-out, and the direction of selection on leaf-out day varied among years. As a result, selection on leaf-out weakened selection for early flowering in one of the study years. We found no evidence of correlational selection. Our results highlight the importance of including temporally correlated traits when exploring selection on the phenology of seasonal events.

Meta-analysis of phenotypic selection on flowering phenology suggests that early flowering plants are favoured

2011 ◽  
Vol 14 (5) ◽  
pp. 511-521 ◽  
Author(s):  
Miguel A. Munguía-Rosas ◽  
Jeff Ollerton ◽  
Victor Parra-Tabla ◽  
J. Arturo De-Nova
Keyword(s):  
Meta Analysis ◽  
Phenotypic Selection ◽  
Flowering Phenology ◽  
Flowering Plants ◽  
Early Flowering
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