Chenopodium Album L.

Williams, J. T.

doi:10.2307/2257758

Cited by 67 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Timing of soil disturbance during 2002-2003 had a profound effect on plant community structure (Keever 1950), and the communities created from the same soil seed bank by cultivation in fall 2002 or spring 2003 (Table 1) were more distinctive than many of the weed communities separated under the National Vegetation Classification (Rodwell 2000). The spring-cultivated community was dominated by summer annual species such as Chenopodium album that are well known to have a chilling requirement to break dormancy (Williams 1969). The fall-cultivated community was dominated by winter annuals such as Tripleurospermum inodorum that germinate during the shortening days of late summer and have no chilling requirement (Roberts and Feast 1974).…”

Section: Discussionmentioning

confidence: 99%

Timing of Disturbance and Coexistence in a Species-Rich Ruderal Plant Community

Crawley

2004

Ecology

View full text Add to dashboard Cite

Theoretical models show how temporal variability can promote plant species richness by slowing or preventing competitive exclusion. This can come about as a result of variation in the frequency, timing, or intensity of events such as frosts, rainfall, soil disturbance, herbivore outbreak, or drought, as long as species exhibit niche differences in their responses to one or more of these factors. Here, I describe an experiment on a community of Ͼ50 predominantly annual plant species, in which the timing of soil disturbance was varied experimentally over a 10-year period (1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001). Replicate plots were plowed once per year in October, March, or May, and disturbance timing had a marked impact on botanical composition from the outset. Following cultivation of all plots in fall 2002 or spring 2003, the effects of long-term cultivation timing on biomass in July 2003 were significant for most species, and the effects were large (10-fold to 100-fold) for many species. Three guilds of species were apparent: fall germinators, spring germinators (seeds with a chilling requirement to break dormancy), and indifferent species (species germinating after disturbance, irrespective of timing). Some species were driven close to local extinction by annual soil disturbance at the ''wrong'' time of year; presumably their seed banks were small or rapidly depleted, and recruitment to their populations may have been more reliant on the annual seed rain. Proof that temporal variability of disturbance is an important contributor to long-term species coexistence requires a demographic approach showing both a storage effect and relative nonlinearity of competition. This experiment represents a first step, by showing that different timings of disturbance can have large effects on the biomass, frequency, and relative abundance of coexisting species.

show abstract

Section: Discussionmentioning

confidence: 99%

Timing of Disturbance and Coexistence in a Species-Rich Ruderal Plant Community

Crawley

2004

Ecology

View full text Add to dashboard Cite

show abstract

“…From the work of Marthaler (8) who compared the growth of this species in water cultures supplied with NO, or NH,-N, it is stated in some standaad texts, and is generally acceptad, that Chenopodium album has a specific requirement for NH,-N and although able to absorb NO,-N it is inherently incaple of reducing it (1, 2, 11). This assertion is scmewhat surprising since Chenopodium album is a common agricultural weed which occurs on a wide variety of soil types (12). Under most conditions it would consequently be expected that NO,-N should be the prodominant N-source available for plant growth.…”

Section: Department Of Agricultural Chemistrymentioning

confidence: 99%

A Note on the Utilization of Nitrate, Urea and Ammonium Nitrogen by Chenopodium album

Kirkby

1967

J Plant Nutrition & Soil

View full text Add to dashboard Cite

Kirkby [Band 117 and increasing pH. CEC, was highest with WAI ratios of 1.8, when the synthetic preparations were carried out at pH 8.3 and highest with Si/Al ratios of 3.5 at p H 5.CEC, generally increased with increasing Si/AI ratios, while CEC, on the otherhand decreased. The predominant charge on "ageing" for 10 days at p H 2 was CEC,. This was virtually independent of the Si/Al ratios.The aluminosilicates failed to form coarse precipitates when the Si/Al ratios exceeded 1.8 at pH's of 5, 7 and 8.3 !unless alkaline earth salts (BaCl,, CaCI, or MgCI,) were added. Preliminary acidification of the sodium silicate or, in the presence of excess AlCI,, titration with N a O H led to coarse precipitates in the absence of alkaline earth salts.Aluminosilicates prepared from metasilicate(Na,SiO,) had predominantely variable charges. "Ageing" prior to titration had little influence on the ratio of CEC, to CEC,. Acidification and "ageing" of AICI, and Na,Si,O, prior to titration gave rise principally to CEC,.The significance between CEC, and CEC, in relation to the effectiveness of synthetic aluminosilicates as cracking catalysts has been discussed. The desirability of colloids possessing largely CEC, and therefore high acidic properties, resulting from "ageing" have been pointed out. Certain factors involving CEC, and CEC, in relation to natural clay formation in soils have (been discussed.[3211]

show abstract

“…Species of Chenopodium s.s . exhibit exceptionally wide morphological plasticity (Williams, ; Uotila, ) leading to determination difficulties, especially in plants from extreme conditions. Due to their morphological plasticity, it is difficult to identify certain morphologically similar species, e.g.…”

Section: Introductionmentioning

confidence: 99%

Genome size stability across EurasianChenopodiumspecies (Amaranthaceae)

et al. 2016

View full text Add to dashboard Cite

Tremendous interspecific genome size variation is a well known phenomenon, whereas genome size within a species is supposed to be exceptionally stable and thus useful as a taxonomic trait. Using DAPI flow cytometry, we tested the stability of genome size in various representatives of Chenopodium s.s. (Amaranthaceae) across a broad geographical range (from Portugal to eastern Russia) in Eurasia. We sampled 1977 Chenopodium individuals of four different ploidies (di‐, tetra‐, hexa‐ and decaploids) from 347 populations. Intraspecific relative genome size variation was low, ranging from 2.0% in C. probstii to 7.7% in C. album, even in the species with broad distributions. We distinguished 12 homogeneous relative genome size groups among the 17 Chenopodium spp. tested. Genome size is useful for distinguishing certain morphologically similar groups of species such as C. suecicum/C. album, C. vulvaria/C. pamiricum–C. iljinii/C. sosnowskyi/C. karoi. Due to its genome size stability, the cosmopolitan species C. album can be used as an alternative internal standard in flow‐cytometric analyses with the additional advantages of annual life cycle, self‐compatibility and common occurrence all over the world. Finally, we did not detect any sign of hybridization between Chenopodium spp. of different ploidies.

show abstract

Chenopodium Album L.

Cited by 67 publications

References 0 publications

Timing of Disturbance and Coexistence in a Species-Rich Ruderal Plant Community

Timing of Disturbance and Coexistence in a Species-Rich Ruderal Plant Community

A Note on the Utilization of Nitrate, Urea and Ammonium Nitrogen by Chenopodium album

Genome size stability across EurasianChenopodiumspecies (Amaranthaceae)

Contact Info

Product

Resources

About