Evaluating the contributions of leaf organ to wheat grain cadmium at the filling stage

Ma, Chuang; Xie, Pan; Yang, Jun; Lin, Lin; Zhang, Ke; Zhang, Hongzhong

doi:10.1016/j.scitotenv.2022.155217

Cited by 21 publications

(2 citation statements)

References 64 publications

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“…In the rice filling stage, grains require a large number of photosynthetic products sourced via leaf photosynthesis, which is more active at this time. Leaves use vascular water absorbed from the soil to synthesize a large number of photosynthates, which are transferred to the grains through the transpiration, resulting in continuous enrichment of 2 H and 18 O isotopes from soil to leaves. − This mechanism accounts for the more positive δ 2 H and δ 18 O leaf values seen after the heading stage.…”

Section: Resultsmentioning

confidence: 99%

Effects of Water Isotope Composition on Stable Isotope Distribution and Fractionation of Rice and Plant Tissues

Zhang,

Li,

Liu

et al. 2024

J. Agric. Food Chem.

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Rice origin authenticity is important for food safety and consumer confidence. The stable isotope composition of rice is believed to be closely related to its water source, which affects its origin characteristics. However, the influence of water availability on the distribution of rice stable isotopes (δ 2 H and δ 18 O) is not clear. In this study, three irrigation waters with different isotopic values were used to investigate isotopic water use effects of Indica and Japonica rice, using pot experiments. Under three different water isotope treatments, the δ 2 H values of Indica polished rice showed significant differences (−65.0 ± 2.3, −60.5 ± 0.8 and −55.8 ± 1.7‰, respectively, p < 0.05) compared to δ 13 C and δ 15 N, as did Japonica polished rice. The values of δ 2 H and δ 18 O of rice became more positive when applying more enriched (in 2 H and 18 O) water, and the enrichment effect was higher in rice than in the corresponding plant tissue. In addition, the δ 2 H and δ 18 O values of Indica rice leaves decreased at the heading stage, increased at the filling stage, and then decreased at the harvest stage. Japonica rice showed a similar trend. δ 2 H changes from stem to leaf were more negative, but δ 18 O changes were more positive, and δ 2 H and δ 18 O values from leaf to rice were more positive for both brown and polished rice. The results from this study will clarify different water isotopic composition effects on rice and provide useful information to improve rice origin authenticity using stable isotope-based methods.

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Section: Resultsmentioning

confidence: 99%

Effects of Water Isotope Composition on Stable Isotope Distribution and Fractionation of Rice and Plant Tissues

Zhang,

Li,

Liu

et al. 2024

J. Agric. Food Chem.

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“…Recent studies in which foliar sprays of Cd were applied at different concentrations have shown that leaves are of negligible importance in the accumulation of Grain-Cd [35,59]. However, it has also been shown that leaves play an important role in the enrichment of grain Cd in wheat at the early stage of filling, and the contribution of leaves to grain Cd at maturity reaches 31.73% [60]. Therefore, the effect of leaves on grain Cd accumulation was small and occurred mainly in the early stages of grain filling.…”

Section: Mechanisms Limiting CD Enrichment Transport and Accumulation...mentioning

confidence: 99%

Low-Cadmium Wheat Cultivars Limit the Enrichment, Transport and Accumulation of Cadmium

Bai,

Ding,

et al. 2024

Agronomy

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Low-cadmium (Cd) accumulating wheat cultivars (LAWC-Cds) can effectively reduce the total Cd content in wheat grains (Grain-Cd). Thirteen LAWC-Cds were planted in three fields to study the enrichment, transport, and accumulation patterns of Cd in LAWC-Cds. Compared with the soil properties before planting, the soil pH and the total Cd content in the soil decreased, while the Cd content in the diethylenetriaminepentaacetic acid extract, soil conductivity, and soil organic matter increased at wheat maturity. The Cd enrichment capacity of the different organs of wheat decreased in the following order: root > leaf > rachis > stem > glume > grain. The dynamics of Cd accumulation in roots affected Grain-Cd, and these factors were negatively correlated. The Cd content and Cd accumulation in all organs of LAWC-Cds showed strong negative correlations with the lengths of the first and second internodes and highly significant positive correlations with both grains per spike and awn length. Structural equation modeling showed that the Cd content of wheat organs had the most direct effect (0.639) in determining Grain-Cd, and soil properties had the largest effect (0.744) in influencing Grain-Cd. This study is important for screening wheat cultivars with stable low Cd-accumulation characteristics.

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Understanding the physiological and molecular mechanisms of grain cadmium accumulation conduces to produce low cadmium grain crops: a review

Li,

Fu,

Trotsenko

et al. 2023

Plant Growth Regul

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Evaluating the contributions of leaf organ to wheat grain cadmium at the filling stage

Cited by 21 publications

References 64 publications

Effects of Water Isotope Composition on Stable Isotope Distribution and Fractionation of Rice and Plant Tissues

Effects of Water Isotope Composition on Stable Isotope Distribution and Fractionation of Rice and Plant Tissues

Low-Cadmium Wheat Cultivars Limit the Enrichment, Transport and Accumulation of Cadmium

Understanding the physiological and molecular mechanisms of grain cadmium accumulation conduces to produce low cadmium grain crops: a review

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