Agrostis tenuis

Agrostis tenuis, 963 Zinc, alkylalkoxy-synthesis, 340 Zinc, alkylphenoxy-synthesis, 340 Zinc, dialkyl-oxidation, 342 Zinc complexes acetylacetone, 372 amidines... 

A number of studies using radiotracers, extraction and centrifugation lead to the conclusion that Zn in Agrostis tenuis is associated with carbohydrate in the cell wall... 

Turner RG (1970) The subceUular distribution of zinc and copper within the roots of the metal tolerant clones of Agrostis tenuis Sibth. New Phytol 69 725 — 731. 

It has been known for some time that tolerance towards high levels of both essential and toxic metals in a local soil environment is exhibited by species and clones of plants that colonize such sites. Tolerance is generally achieved by a combination of exclusion and poor uptake and translocation. Some species can accumulate large quantities of metals in their leaves and shoots at potentially toxic levels, but without any harmful effects. These metal-tolerant species have been used in attempts to reclaim and recolonize metal-contaminated wastelands. More recently such species have attracted the attention of inorganic chemists. There is abundant evidence that the high metal levels are associated with carboxylic acids, particularly with nickel-tolerant species such as Allysum bertolonii. The main carboxylic acids implicated are citric, mahc and malonic acids (see refs. 30 and 31 and literature cited therein). Complexation of zinc by malic and oxalic acids has been reported in the zinc-tolerant Agrostis tenuis and oxalic acid complexation of chromium in the chromium-accumulator species Leptospermum scoparium ... 

Barley grass, Hordeum glaucum, 581 Bentgrass, Agrostis tenuis, 580 Bluegrass, Poa annua, 20 Copper-tolerant grass, capillaris, 183... 

Most species of cool-season and warm-season turfgrasses are tolerant when the root system is well estabhshed. However, some species (such as Agrostis tenuis) and some varieties (such as Cynodon. dactylon x C. transvaalensis Tlf een ) are not tolerant. Dithiopyr should not be applied to new perennial turf until the root system is well established [10). It should also not be apphed to sod within three months of harvest. Dithiopyr s effect on rooting of estabhshed turf ss species was shown to be minimal and not significantly different than most other pre-emergent herbicides with an MAI mode of action [11,12). 

As long ago as 1952, Bradshaw [256J reported that root growth was inhibited when plants of Agrostis tenuis were grown in soil from the tip of an old Welsh lead mine, while plants originally growing on the tip produced normal roots. 

Here, we report whether wheat seedlings growing in liquid culture adulterated with AFB can exhibit cultivar dependent differences in both organ dimensions and Zn++ uptake/distribution. Such studies are important because aflatoxin-contaminated crops have been ploughed under from time to time and certain seedlings can take-up aflatoxins from soils (Mertz et al., 1980). In addition, Zn++, which can be a soil pollutant, is accumulated by some plants, e.g., Agrostis tenuis (Turner, 1970 Turner and Marshall, 1971) and Silene maritma (Baker, 1978). 

Turner, R.G., and Marshall, C. (1971). The accumulation of Zn " " by root homogenates of zinc tolerant and non-tolerant clones of Agrostis tenuis sibth. New Phytol., 70, 539-545. 

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