The Effects of More Realistic Forms of Lead Heterogeneity in Soil on Uptake, Biomass and Root Response of Two Brassica species

Solomon-Wisdom, Grace Oyiza; John, Elizabeth A.

doi:10.9734/air/2015/17975

Cited by 2 publications

(2 citation statements)

References 57 publications

(86 reference statements)

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“…Root architecture may change, resulting in fewer roots growing near or in a patch containing toxic agents (Moradi et al, 2009; Robinson et al, 2009; Khare et al, 2017). As with nutrients, plant responses to toxic agents depend on their distribution in soil (Solomon-Wisdom et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil

et al. 2019

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Root foraging may increase plant nutrient acquisition at the cost of reducing the total volume of soil explored, thereby reducing the chance of the roots encountering additional patches. Patches in soil seldom contain just one nutrient: the patch may also have distinct textural, hydrological, and toxicological characteristics. We sought to determine the characteristics of root foraging by a pioneering species, Leptospermum scoparium, using pot trials and rhizobox experiments with patches of biosolids. The growth of L. scoparium was increased by <50 t/ha equiv. of biosolids but higher doses were inhibitory. Roots foraged patches of biosolids in a low-fertility soil. There was no evidence of chemotaxis, rather, the roots proliferated toward the patch of biosolids, following chemical gradients of nitrate. While the biosolids also contained high concentrations of other nutrients (P, K, and S), only significant chemical gradients of nitrate were found. Once the roots encountered a patch of biosolids, the growth of the plant increased to a level similar to plants growing in soil homogeneously mixed with biosolids or surface-applied biosolids. Our results indicate that roots forage nitrate, which is mobile in soil, and that gradients of nitrate may lead to patches containing other less mobile nutrients, such as phosphate or potassium.

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Section: Introductionmentioning

confidence: 99%

Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil

et al. 2019

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“…Moreover, assessing growth, biomass allocation, and chlorophyll content would give a fuller picture of how iron heterogeneity influences waterleaf physiology beyond just uptake. Parameters like root proliferation in nutrient patches also need measurement [22,23,24].…”

Section: Discussionmentioning

confidence: 99%

Iron Heterogeneity in Soil and its Relation to its Uptake by Water Leaf (Talinum Triangulaire L.)

Ogunlade-Anibasa, G.O.,

Aniki, S.O.,

Ameh, P.T.

et al. 2024

IJPSS

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This study investigated the relationship between iron (Fe) heterogeneity in soil and Fe uptake by water leaf (Talinum triangulaire). A greenhouse pot experiment was conducted with water leaf grown under three treatments; control (0mg/kg Fe added), homogeneous (1000mg/kg Fe added), and heterogeneous (simulated realistic heterogeneity) for six weeks after initial establishment in the nursery for four weeks). At harvest, plant samples were cut, washed, dried, milled into powder and analyzed for iron concentrations using the Atomic Absorption Spectrometer (AAS) Thermos Fisher Scientific Model 3000 ICE after acid digest by Nitric acid (HNO3). The mean root Fe concentrations of the control, homogeneous and heterogeneous treatments were 1263 ±154mg/kg, 1504 ±178mg/kg and 1393mg/kg ±140mg/kg respectively. The mean shoot Fe concentrations of the control, homogeneous and heterogeneous treatments were 904 ±174u mg/kg, 1401±117 mg/kg and 1045 ±95 mg/kg respectively. There was no statistically significant difference (p >0.005) in shoot and root Fe concentration between treatments. However, the homogeneous treatment was 0.19 times higher than the control and 0.07 times higher than the heterogeneous treatment. Iron level in the roots was 0.35 times high as the control and 0.25 times higher than the heterogeneous treatment. The Concentration factors for the control, homogeneous, and heterogeneous treatments were 0.1118, 0.1498 and 0.1258 respectively. The similarity in concentration factor between treatments showed that it is an accumulator of Fe and has the affinity for Fe irrespective of the varied soil concentrations. These findings indicate that water leaf possesses mechanisms enabling efficient Fe acquisition from variable soil conditions. Overall, the study provides initial evidence that water leaf is resilient to variability in soil Fe distribution, holding implications for its improved cultivation. However, further research on the specific genes and processes governing iron mobilization and uptake in water leaf is recommended.

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The Effects of More Realistic Forms of Lead Heterogeneity in Soil on Uptake, Biomass and Root Response of Two Brassica species

Cited by 2 publications

References 57 publications

Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil

Response of a Pioneering Species (Leptospermum scoparium J.R.Forst. & G.Forst.) to Heterogeneity in a Low-Fertility Soil

Iron Heterogeneity in Soil and its Relation to its Uptake by Water Leaf (Talinum Triangulaire L.)

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