Assessment of arbuscular mycorrhizal fungal propagules and colonization from abandoned agricultural fields and semi-arid grasslands in riparian floodplains

Richter, Brantlee Spakes; Tiller, Ronald L.; Stutz, Jean C.

doi:10.1016/s0929-1393(02)00038-0

Cited by 25 publications

(17 citation statements)

References 35 publications

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“…(b) Beneficial * Salsola tragus has been used as a source of forage in arid regions of the Great Plains and Canadian prairies (e.g., Moyer 1992;Richter et al 2002;Berglund and Zollinger 2003). In southern Alberta, harvested S. tragus shoot biomass yielded over 1000 kg ha…”

Section: Description and Account Of Variationmentioning

confidence: 99%

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

Beckie¹,

Francis²

2009

Can. J. Plant Sci.

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775Á789. This account updates that published by Crompton and Bassett in 1985 (classified then as Salsola pestifer A. Nels.). The taxonomy of this species has been controversial and confusing. Salsola tragus is an annual broadleaf weed species native to Eurasia and inadvertently introduced to the Americas in crop seed in 1873. This naturalized species is a common and economically important weed in crop production systems and non-cropped disturbed areas in semiarid to arid regions of western North America; in eastern North America, S. tragus commonly occurs along roadsides, railways, and other dry, stony, and sandy areas. Pollen-mediated gene flow and efficient seed dispersal aids both short-and longdistance spread. As a C 4 species, S. tragus is highly competitive in semiarid and arid small-grain cropping systems because of its ability to emerge early, efficiently extract soil available water by its extensive root system, and tolerate heat, drought, and salinity. Moreover, the evolution of acetolactate synthase-inhibitor resistance has impacted herbicidal control of the species. The weed has been used as an emergency forage during drought, and is palatable when immature and non-toxic to livestock.

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Section: Description and Account Of Variationmentioning

confidence: 99%

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

Beckie¹,

Francis²

2009

Can. J. Plant Sci.

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“…Vegetation at the grassland site was dominated by big sacaton (Sporobolus wrightii) with a canopy height of approximately 1 m. Sacaton is a C 4 bunchgrass associated with riparian-influenced grasslands in the southwestern United States (Richter et al 2002). During 2003, the grassland growing-season plant area index (PAI) varied from 1.0 to 2.5 (Scott et al 2006).…”

Section: Site Descriptionmentioning

confidence: 99%

The sensitivity of ecosystem carbon exchange to seasonal precipitation and woody plant encroachment

et al. 2006

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Ongoing, widespread increases in woody plant abundance in historical grasslands and savannas (woody encroachment) likely will interact with future precipitation variability to influence seasonal patterns of carbon cycling in water-limited regions. To characterize the effects of woody encroachment on the sensitivity of ecosystem carbon exchange to seasonal rainfall in a semi-arid riparian setting we used flux-duration analysis to compare 2003-growing season NEE data from a riparian grassland and shrubland. Though less seasonally variable than the grassland, shrubland NEE was more responsive to monsoon rains than anticipated. During the 2004-growing season we measured leaf gas exchange and collected leaf tissue for delta(13)C and nitrogen content analysis periodically among three size classes of the dominant woody-plant, Prosopis velutina and the dominant understory species, Sporobolus wrightii, a C(4) bunchgrass, present at the shrubland. We observed size-class and plant functional type independent patterns of seasonal plant performance consistent with greater-than-anticipated sensitivity of NEE in the shrubland. This research highlights the complex interaction between growing-season precipitation, plant-available alluvial groundwater and woody plant abundance governing ecosystem carbon balance in this semi-arid watershed.

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“…The extent of AM colonization is determined by numerous fungal and plant specific factors which include types of vegetation (Richter et al, 2002), host plant species (Bever, 2002), host density (Koide and Dickie, 2002), and herbivory (Hartnett and Wilson, 2002), etc. On the other hand, many abiotic factors, such as time of year (Carvalho et al, 2001), weather conditions (sunlight, temperature, moisture) (Al-Karaki, 1998), and salt (Mchugh and Dighton, 2004) are known to influence the extent of AM colonization (Entry et al, 2002) as well.…”

Section: Introductionmentioning

confidence: 99%

Seed size influences arbuscular mycorrhizal symbiosis across leguminous host-plant species at the seedling stage

Jin

Wang

et al. 2009

Symbiosis

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Eighteen species of the Fabaceae were selected to investigate the relationship between plant seed size and the density of arbuscular mycorrhizal (AM) structures on the roots of young plants. The results demonstrated that seed size showed a strong negative correlation with the density of AM structures: smaller seeds exhibiting higher AM densities, which suggested that seed size may regulate AM symbiosis across leguminous host-plants species in natural habitats. Furthermore, the results also implied that different plant species used specific strategies, such as mycorrhizal symbiosis, to enhance seedling survival at the seedling stage.

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Assessment of arbuscular mycorrhizal fungal propagules and colonization from abandoned agricultural fields and semi-arid grasslands in riparian floodplains

Cited by 25 publications

References 35 publications

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

The sensitivity of ecosystem carbon exchange to seasonal precipitation and woody plant encroachment

Seed size influences arbuscular mycorrhizal symbiosis across leguminous host-plant species at the seedling stage

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