Abstract
Two genotypes of Brassica parachinensis, DEHP high-accumulation of Youqing-60 and low-accumulation of Teqing-60, were grown in hydroponic systems contaminated with DEHP (20 and 50 mg x L(-1)). Anatomy of roots was measured, and their effects on uptake of DEHP in roots and shoots were discussed. The results showed that roots anatomy of two genotypes of Brassica parachinensis and their responds to DEHP pollution were significantly different. DEHP contents in roots and shoots of Youqing-60 were mainly affected by the thickness of cambium in taproot and the diameter of vascular bundle, the coefficients on DEHP of roots and shoots were 0.900 and 0.809, respectively. DEHP contents of Teqing-60 were mainly affected by the thickness of cambium in taproot and cortex in fibre root in roots, which the coefficient was 0.757, and were mainly affected by the thickness of cambium in taproot in shoots, which the coefficient was 0.856. The wood ray cells in roots of Youqing-60 were rectangular shape and arranged orderly. The thickness of cork layer in taproot and cortex in fibre root of Youqing-60 were lower and the quantity of trachea and diameter of vascular bundle and trachea in fibre root of Yonqing-60 were higher than that of Teqing-60, which indicated that DEHP in soil solution and adsorbed on root were easier penetrated into xylem and transported in Youqing-60 than in Teqing-60.
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Claims 9
Claim · model-written summary
The two genotypes differed significantly in root anatomy and response to DEHP.
- Taxon
- Brassica parachinensis
Brassica rapa var. parachinensise0 - Outcome
- roots anatomye0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that roots anatomy of two genotypes of Brassica parachinensis and their responds to DEHP pollution were significantly different.”
Claim · model-written summary
In Youqing-60, root DEHP content related to taproot cambium thickness and vascular bundle diameter, coefficient 0.900.
- Material
- Youqing-60e0
- Organ / stage
- rootse0
- Outcome
- DEHP contents in rootse0
- Value
- 0.900e0
- Qualifier
- thickness of cambium in taproot and the diameter of vascular bundlee0
Not reportedTaxonDirection
Verbatim
e0“DEHP contents in roots and shoots of Youqing-60 were mainly affected by the thickness of cambium in taproot and the diameter of vascular bundle, the coefficients on DEHP of roots and shoots were 0.900 and 0.809, respectively.”
Claim · model-written summary
In Youqing-60, shoot DEHP content related to taproot cambium thickness and vascular bundle diameter, coefficient 0.809.
- Material
- Youqing-60e0
- Outcome
- DEHP contents in roots and shootse0
- Value
- 0.809e0
- Qualifier
- thickness of cambium in taproot and the diameter of vascular bundlee0
Not reportedTaxonDirection
Verbatim
e0“DEHP contents in roots and shoots of Youqing-60 were mainly affected by the thickness of cambium in taproot and the diameter of vascular bundle, the coefficients on DEHP of roots and shoots were 0.900 and 0.809, respectively.”
Claim · model-written summary
Teqing-60 root DEHP content related to taproot cambium and fibre-root cortex thickness, coefficient 0.757.
- Material
- Teqing-60e0
- Outcome
- DEHP contentse0
- Value
- 0.757e0
- Qualifier
- thickness of cambium in taproot and cortex in fibre roote0
Not reportedTaxonDirection
Verbatim
e0“DEHP contents of Teqing-60 were mainly affected by the thickness of cambium in taproot and cortex in fibre root in roots, which the coefficient was 0.757”
Claim · model-written summary
Teqing-60 shoot DEHP content related to taproot cambium thickness, coefficient 0.856.
Not reportedTaxonDirection
Verbatim
e0“and were mainly affected by the thickness of cambium in taproot in shoots, which the coefficient was 0.856.”
Claim · model-written summary
Youqing-60 root wood ray cells were rectangular and orderly.
Not reportedTaxonDirection
Verbatim
e0“The wood ray cells in roots of Youqing-60 were rectangular shape and arranged orderly.”
Claim · model-written summary
Youqing-60 had thinner taproot cork and fibre-root cortex than Teqing-60.
- Material
- Youqing-60e0
- Outcome
- thickness of cork layer in taproot and cortex in fibre roote0
- Direction
- lowere0
- Comparator
- Teqing-60e0
Not reportedTaxon
Verbatim
e0“The thickness of cork layer in taproot and cortex in fibre root of Youqing-60 were lower and the quantity of trachea and diameter of vascular bundle and trachea in fibre root of Yonqing-60 were higher than that of Teqing-60”
Claim · model-written summary
Yonqing-60 had more trachea and larger vascular bundles and trachea than Teqing-60.
- Material
- Yonqing-60e0
- Outcome
- quantity of trachea and diameter of vascular bundle and tracheae0
- Direction
- highere0
- Comparator
- Teqing-60e0
Not reportedTaxon
Verbatim
e0“the quantity of trachea and diameter of vascular bundle and trachea in fibre root of Yonqing-60 were higher than that of Teqing-60”
Claim · model-written summary
The authors infer easier DEHP penetration and transport in Youqing-60 than Teqing-60.
- Material
- Youqing-60e0
- Outcome
- penetrated into xylem and transportede0
- Qualifier
- DEHP in soil solution and adsorbed on roote0
- Comparator
- Teqing-60e0
Not reportedTaxon
Verbatim
e0“DEHP in soil solution and adsorbed on root were easier penetrated into xylem and transported in Youqing-60 than in Teqing-60.”