Applying DNA C-values to evaluate invasiveness of angiosperms: validity and limitation

Chen, Guoqi; Guo, Sen; Yin, Leiming

doi:10.1007/s10530-009-9550-0

Cited by 19 publications

(17 citation statements)

References 42 publications

(62 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Portulaca oleracea 's lifespan is very flexible, a quality that implies a high level of weediness and invasiveness (Rejmánek, ; Chen et al ., ). The lifespan was reported to be approximately three months in Canada (Miyanishi & Cavers, ) and northern India (Singh, ).…”

Section: Discussionmentioning

confidence: 97%

The hotter the weather, the greater the infestation of Portulaca oleracea: opportunistic life‐history traits in a serious weed

et al. 2015

View full text Add to dashboard Cite

Portulaca oleracea, an r-strategist, is one of the world's most troublesome weeds. During hot seasons, P. oleracea frequently becomes monodominant in choy sum (Brassica parachinensis) fields in Guangzhou city, southern China. Here, we studied the seasonal dynamics of P. oleracea's germinable soil seedbank, population density and above-ground biomass in choy sum fields that had been cultivated continuously for several years. Using P. oleracea seeds collected from these fields, we tested seed dormancy, survival and germination, seedling growth and generation time. Portulaca oleracea occurred at high levels during the hot season, but its occurrence was low, and the germinable soil seedbank was much greater during the cold season. The weed's opportunistic characteristics allowed it to avoid freezing and to proliferate during optimal conditions. Portulaca oleracea's generation time was very flexible, as short as 31 days during the hot season, but longer than 100 days during the colder season. Seed dormancy tended to be shorter when the seeds were stored at a higher temperature. At a temperature of 35°C, both seed germination and seedling growth showed advantages over those of choy sum. Storage for one year at a temperature of À20°C or burial in a paddy field did not significantly reduce P. oleracea seed germination. Nevertheless, seed storage at a temperature of 15°C and soil coverage of 0.5 cm on top of the seeds significantly constrained seed germination. 'Stale seedbed' and/or coverage of the surface with soil are recommended during the hot season. However, rotation of rice and upland crops is not an efficient method for managing Portulaca oleracea infestation.

show abstract

Section: Discussionmentioning

confidence: 97%

The hotter the weather, the greater the infestation of Portulaca oleracea: opportunistic life‐history traits in a serious weed

et al. 2015

View full text Add to dashboard Cite

show abstract

“…This is consistent with our finding that whether a species has known polyploid variants was not a direct predictor of naturalization in the PBN model. Rather, the effect of polyploidy may operate indirectly by leading to a reduction in monoploid genome size as suggested by Chen, Guo, and Yin () and Leitch and Bennett (). Nor did species with polyploid cytotypes show significantly faster rates of naturalization in survival analyses, and the effect of polyploidy in regression models was weaker than that of genome size, particularly in uncultivated species.…”

Section: Discussionmentioning

confidence: 98%

Residence time, native range size, and genome size predict naturalization among angiosperms introduced to Australia

Schmidt

Drake

Stephens

2017

Ecology and Evolution

View full text Add to dashboard Cite

Although critical to progress in understanding (i) if, and (ii) at what rate, introduced plants will naturalize and potentially become invasive, establishing causal links between traits and invasion success is complicated by data gaps, phylogenetic nonindependence of species, the inability to control for differences between species in residence time and propagule pressure, and covariance among traits. Here, we focus on statistical relationships between genomic factors, life history traits, native range size, and naturalization status of angiosperms introduced to Australia. In a series of analyses, we alternately investigate the role of phylogeny, incorporate introduction history, and use graphical models to explore the network of conditional probabilities linking traits and introduction history to naturalization status. Applying this ensemble of methods to the largest publicly available data set on plant introductions and their fates, we found that, overall, residence time and native range size best predicted probability of naturalization. Yet, importantly, probability of naturalization consistently increased as genome size decreased, even when the effects of shared ancestry and residence time in Australia were accounted for, and that this pattern was stronger in species without a history of cultivation, but present across annual–biennials, and herbaceous and woody perennials. Thus, despite introduction biases and indirect effects of traits via introduction history, across analyses, reduced genome size was nevertheless consistently associated with a tendency to naturalize.

show abstract

Section: Discussionmentioning

confidence: 99%

“…There is very little experimental evidence available at this point that could effectively explain the prevalence of polyploidy amongst common and (particularly) invasive species. Recent comparative studies (Chen, Guo & Yin 2010) and experimental studies on Phlox drummondii, Solidago gigantea and Arabidopsis spp. (Vyas et al 2007;Hull-Sanders et al 2009;Ni et al 2009) have shown that polyploids have a distinct advantage in photosynthetic efficiency, growth, reduced generation time, vigour and biomass over their diploid counterparts, but whether this or similar advantages are found more universally amongst polyploids is not known.…”

Section: Discussionmentioning

confidence: 99%

Ploidy influences rarity and invasiveness in plants

2011

View full text Add to dashboard Cite

Summary1. The factors associated with plant species' endangerment and (conversely) invasiveness are of broad interest due to their potential value in explaining the causes and consequences of population status. While most past work has focussed on ecological variables, recent work suggests that genetic attributes may be strongly associated with plant species status. 2. We collated data on chromosome numbers for 640 endangered species (worldwide) and their 9005 congeners, and for 81 invasive species and their 2356 congeners. We related ploidy (diploid versus polyploid) to endangerment and invasiveness. We also related chromosome number (absolute number and relative to the minimum recorded for the genus) to endangerment and invasiveness with a randomization test, taking the variation of reported chromosome numbers into account. All analyses considered the relatedness of the taxa. 3. We found that endangered plants are disproportionately likely to be diploid and to have lower ploidy ratios, whilst invasive plant species are generally found to have high chromosome counts and to be polyploid. 4. While considering the effect of relatedness, being endangered is c. 8% less likely as ploidy ratio doubles and 14% less likely for polyploids compared with diploids. Being invasive is 12% more likely as chromosome number doubles and 20% more likely for polyploids compared with diploids. There was no significant effect of raw chromosome number on endangerment or of ploidy ratio on invasiveness.5. Our findings demonstrate the importance of genomic attributes as risk factors of vulnerability to endangerment or invasiveness in higher plant species, and raise interesting questions as to potential causes of the pattern. 6. Synthesis. Our findings generate new hypotheses on plant rarity and invasiveness influenced by genomic attributes and further our understanding of the role of ploidy in rarity and invasiveness in higher plants. The cause of these relationships are potentially complex, requiring further research; ultimately, understanding the mechanistic basis of population status could aid conservation programs seeking to identify potentially endangered or invasive species.

show abstract

Applying DNA C-values to evaluate invasiveness of angiosperms: validity and limitation

Cited by 19 publications

References 42 publications

The hotter the weather, the greater the infestation of Portulaca oleracea: opportunistic life‐history traits in a serious weed

The hotter the weather, the greater the infestation of Portulaca oleracea: opportunistic life‐history traits in a serious weed

Residence time, native range size, and genome size predict naturalization among angiosperms introduced to Australia

Ploidy influences rarity and invasiveness in plants

Contact Info

Product

Resources

About