Absorption and efflux of chloro‐s‐triazines by <i>Setaria</i> roots*

Orwick, P. L.; Schreiber, M. M.; Hodges, Thomas K.

doi:10.1111/j.1365-3180.1976.tb00392.x

Cited by 42 publications

(49 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This arsenate is found to affect the root development and reduce the plant height of one variety of rice (Abedin et al 2002a). Some studies have reported that plant roots are unable to accumulate the essential nutrients from soil in the presence of excess arsenic because As(III) reacts with the sulphydryl groups of proteins (Speer 1973), causing disruption of root functions of plants (Orwick et al 1976). …”

Section: Resultsmentioning

confidence: 98%

Arsenic uptake and phytotoxicity of T-aman rice (Oryza sativa L.) grown in the As-amended soil of Bangladesh

et al. 2009

View full text Add to dashboard Cite

A pot-culture experiment was conducted in open-field conditions with highly cultivated locally transplanted (T) aman rice (Oryza sativa L.) named BR-22 in arsenic (As)-amended soil (0, 1.0, 5.0, 10.0, 20.0, 30.0, 40.0 and 50.0 mg kg -1 As) of Bangladesh to see the effect of As on the growth, yield and metal uptake of rice. Arsenic was applied to soil in the form of sodium arsenate (Na 2 HAsO 4 ). Arsenic affected the plant height, tiller and panicle numbers, grain and straw yield of T-aman rice significantly (P B 0.05). The grain As uptake of T-aman rice was found to increase with increase of As in soil and a high grain As uptake was observed in the treatments of 30-50 mg kg -1 As-containing soil. These levels exceed the food hygiene concentration limit of 1.0 mg kg -1 As. However, the straw As uptake varied significantly (P B 0.05) from a low concentration of As in soil (5 mg kg -1 ) and the highest uptake was noticed in 20 mg kg -1 As treatment.

show abstract

Section: Resultsmentioning

confidence: 98%

Arsenic uptake and phytotoxicity of T-aman rice (Oryza sativa L.) grown in the As-amended soil of Bangladesh

et al. 2009

View full text Add to dashboard Cite

show abstract

“…It is known that arsenite reacts with sulfhydryl groups of proteins of roots (Speer 1973) causing disruption of the root function (Isensee et al. 1971; Orwick et al. 1976) and even cellular death.…”

Section: Resultsmentioning

confidence: 99%

Physiological and mineralogical properties of arsenic-induced chlorosis in rice seedlings grown hydroponically

Shaibur

Kitajima²,

Sugawara³

et al. 2006

Soil Science and Plant Nutrition

View full text Add to dashboard Cite

A hydroponic experiment was conducted to observe the effect of arsenic (As) on a number of physiological and mineralogical properties of rice (Oryza sativa L. cv. Akihikari) seedlings. Seedlings were treated with 0, 6.7, 13.4 and 26.8 µmol L−1 As (0, 0.5, 1.0 and 2.0 mg As L−1) for 14 days in a greenhouse. Shoot dry matter yield decreased by 23, 56 and 64%; however, the values for roots were 15, 35 and 42% for the 6.7, 13.4 and 26.8 µmol L−1 As treatments, respectively. Shoot height decreased by 11, 35 and 43%, while that of the roots decreased by 6, 11 and 33%, respectively. These results indicated that the shoot was more sensitive to As than the root in rice. Leaf number and width of leaf blade also decreased with As toxicity. Arsenic toxicity induced chlorosis symptoms in the youngest leaves of rice seedlings by decreasing chlorophyll content. Concentrations and accumulations of K, Mg, Fe, Mn, Zn and Cu decreased significantly in shoots in the 26.8 µmol L−1 As treatment. However, the concentration of P increased in shoots at 6.7 and 13.4 µmol L−1 As levels, indicating a cooperative rather than antagonistic relationship. Arsenic and Fe concentration increased in roots at higher As treatments. Arsenic translocation (%) decreased in the 13.4 and 26.8 µmol L−1 As treatments compared with the 6.7 µmol L−1 As treatment. Arsenic and Fe were mostly concentrated in the roots of rice seedlings, assuming co‐existence of these two elements. Roots contained an almost 8–16‐fold higher As concentration than shoots in plants in the As treatments. Considering the concentration of Mn, Zn and Cu, it was suggested that chlorosis resulted from Fe deficiency induced by As and not heavy‐metal‐induced Fe deficiency.

show abstract

“…This pattern of distribution, in which a large fraction of the herbicide is retained in the stem tissue below the transpiring leaves could be due to the adsorption of atrazine in the stem apoplast. However, since atrazine has been shown not to bind to cell walls (20,22,24,39), the large fraction of atrazine retained in the stem tissue can be explained by penetration of the molecule into the symplast. Atrazine has been demonstrated to freely and reversibly penetrate the symplast of corn root tissue and protoplasts (6), potato tuber tissue (22), barley roots (30,31), and velvet leaf (Abutilon theophrasti) roots (24,25).…”

Section: Methodsmentioning

confidence: 99%

“…Herbicides which move in the symplastic transport pattern were thought to be preferentially absorbed into the symplast, and subject to long-distance transport in the phloem (1). More recent experimental evidence has demonstrated that several compounds which display the apoplastic transport pattern easily penetrate the plasmalemma ofplant cells (6,20,22,24,25,30,31).…”

mentioning

confidence: 99%

Apoplastic and Symplastic Pathways of Atrazine and Glyphosate Transport in Shoots of Seedling Sunflower

Jachetta¹,

Appleby²,

Boersma³

1986

Plant Physiol.

View full text Add to dashboard Cite

ABSTRACII'4ClAtrazine (2-chloro4-lethylaminol-6-Iisopropylamino-s-triazine) and [4Clglyphosate (N-Iphosphonomethyllglycine) were xylem fed to sunflower shoots at 100 micromolar for 1 hour in the light, then placed in the dark at 100% relative humidity for 1, 4, 7, or 10 hours. The distribution of atrazine and glyphosate between shoot parts, in the leaves, and between the aoplast and symplast of the leaf was determined. The apoplastic concentrations and distribution patterns of atrazine and glyphosate in the leaves were evaluated using a pressure dehydration technique, our results were compared to the previously reported distribution patterns of the naturally occurring apoplastic leaf solutes, and the apoplastic dye PTIS (trisodium 3-hydroxy-5,8,10-pyrenetrisulfonate). The pattern of atrazine and glyphosate distribution in the shoot, and between the leaf apoplast and symplast, was found to reflect the potential of these herbicides to enter the shoot symplast. The results of this study are discussed with respect to current theories of xenobiotic transport in plants, and have been found to be consistent with the intermediate permeability hypothesis for xenobiotic transport.

show abstract

Absorption and efflux of chloro‐s‐triazines by Setaria roots*

Cited by 42 publications

References 16 publications

Arsenic uptake and phytotoxicity of T-aman rice (Oryza sativa L.) grown in the As-amended soil of Bangladesh

Arsenic uptake and phytotoxicity of T-aman rice (Oryza sativa L.) grown in the As-amended soil of Bangladesh

Physiological and mineralogical properties of arsenic-induced chlorosis in rice seedlings grown hydroponically

Apoplastic and Symplastic Pathways of Atrazine and Glyphosate Transport in Shoots of Seedling Sunflower

Contact Info

Product

Resources

About