Foliar application of abscisic acid mitigates cadmium stress and increases food safety of cadmium-sensitive lettuce (<i>Lactuca sativa</i> L.) genotype

Dawuda, Mohammed Mujitaba; Liao, Weibiao; Hu, Linli; Yu, Jiangnan; Xie, Jianming; Calderón-Urrea, Alejandro; Wu, Yue; Tang, Zhongqi

doi:10.7717/peerj.9270

Cited by 18 publications

(11 citation statements)

References 57 publications

(81 reference statements)

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“…In a study with lettuce (L. sativa), radish (Raphanus sativus), tomato (Solanum lycopersicum) and ryegrass (Secale cereale), it was verified the maximum accumulation of Pb in the roots (Rai et al, 2019), suggesting that immobilization may be linked to the amino acid histidine, consisting of a plant strategy to avoid toxicity in parts above ground (Dawuda et al, 2020). Pb detoxification mechanisms also include storage in the vacuole, synthesis of phytochelatins, and binding to glutathione (Pires-Lira et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals

Santos

Silva

et al. 2022

Braz. J. Biol.

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This study goal to evaluate the effects of different concentrations of lead (Pb) and silver (Ag) on germination, initial growth and anatomical alterations of Lactuca sativa L. Plants use various mechanisms to reduce the impacts caused by anthropic action, such as xenobiotic elements of soils and water contaminated by heavy metals. These metals were supplied as lead nitrate and silver nitrate and the following treatments were established: control for both metals, maximum dose of heavy metals, for arable soils, allowed by the National Council of the Environment (Ag = 25 mg. Kg-1, Pb = 180 mg. Kg-1), double (Ag = 50 mg. Kg-1, Pb = 360 mg. Kg-1) and triple (Ag = 75 mg. Kg-1, Pb = 540 mg. Kg -1) of this dosage. Vigor and germination tests of the seeds and possible anatomical changes in the leaves and roots of lettuce plants were performed. The species showed a high capacity to germinate under Pb and Ag stress, and the germination was never completely inhibited; however, the germination decreased with increasing Pb concentrations, but not under Ag stress. The use of increasing doses of metals reduced seed vigor and increased chlorophyll content. An increase in biomass was also observed in plants from treatments submitted to Pb. The phytotoxic effects of metals were more pronounced at 15 days after sowing. Anatomically, L. sativa was influenced by metal concentrations, and had a reduction of up to 79.9% in root epidermis thickness at the highest Pb concentration, although some structures did not suffer significant changes. The results suggest that L. sativa presents tolerance to high concentrations of heavy metals, showing possible mechanisms to overcome the stress caused by these metals. In this research lettuce possibly used the mechanism of exclusion of metals retaining Pb and Ag in the roots preserving the photosynthetic apparatus in the aerial part of the plants. In general, the chemical element Pb was more toxic than Ag, in these experimental conditions.

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Section: Discussionmentioning

confidence: 99%

A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals

Santos

Silva

et al. 2022

Braz. J. Biol.

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“…The Cd was found to impair the nutrient balance and accumulation ( Matraszek et al, 2016 ; Wu et al, 2017 ). In oilseed rape and lettuce, Cd stress caused an imbalance of mineral elements ( Xu et al, 2016 ; Dawuda et al, 2020 ). It was found that AMF could increase the nutrient absorption of Guar ( El-Sawah et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Physiological Mechanism of Exogenous 5-Aminolevulinic Acid Improved the Tolerance of Chinese Cabbage (Brassica pekinensis L.) to Cadmium Stress

Yang

Wang

et al. 2022

Front. Plant Sci.

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The 5-aminolevulinic acid (ALA), a new type of plant growth regulator, can relieve the toxicity of cadmium (Cd) to plants. However, its mechanism has not been thoroughly studied. In the study, the roles of ALA have been investigated in the tolerance of Chinese cabbage (Brassica pekinensis L.) seedlings to Cd stress. The results showed that Cd significantly reduced the biomass and the length of the primary root of seedlings but increased the malondialdehyde (MDA) and the hydrogen peroxide (H2O2) contents. These can be effectively mitigated through the application of ALA. The ALA can further induce the activities of antioxidant enzymes in the ascorbate-glutathione (AsA-GSH) cycle under Cd stress, which resulted in high levels of both GSH and AsA. Under ALA + Cd treatment, the seedlings showed a higher chlorophyll content and photosynthetic performance in comparison with Cd treatment alone. Microscopic analysis results confirmed that ALA can protect the cell structure of shoots and roots, i.e., stabilizing the morphological structure of chloroplasts in leaf mesophyll cells. The qRT-PCR results further reported that ALA downregulated the expressions of Cd absorption and transport-related genes in shoots (HMA2 and HMA4) and roots (IRT1, IRT2, Nramp1, and Nramp3), which resulted in the low Cd content in the shoots and roots of cabbage seedlings. Taken together, the exogenous application of ALA alleviates Cd stress through maintaining redox homeostasis, protecting the photosynthetic system, and regulating the expression of Cd transport-related genes in Chinese cabbage seedlings.

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“…The self-sufficiency rate of food in a place is between 90 and 95%, indicating that the food security of the place is basically safe. The self-sufficiency rate of grain in a place is higher than 95%, indicating that the place can already rely on local grain to achieve self-satisfaction ( Dawuda et al, 2020 ). Meanwhile, the main factors affecting grain production are concentrated in the following aspects.…”

Section: Methodsmentioning

confidence: 99%

Innovation and Entrepreneurship Strategies of Teachers and Students in Financial Colleges and Universities Under the Direction of Food Security

Haojie

2022

Front. Psychol.

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This study aims to better promote the innovation and entrepreneurship of teachers and students in finance and economics colleges and universities in terms of food security. Based on the relevant theories such as food security, innovation and entrepreneurship, the questionnaire was used to investigate the issues related to food security of teachers and students in colleges and universities. Next, the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) analysis method was introduced to evaluate the safety metrics of the response subsystem. Finally, Internet of Things (IoT) monitoring technology was applied to grain growth and sales. The research results show that college teachers and students have a disjointed cognition of food security as important talents in innovation and entrepreneurship. After the TOPSIS analysis method is used to study, when college teachers and students choose to start a business in food security, they must pay attention to the changes in economic factors. The IoT monitoring technology is applied to grain growth and sales, and the monitoring technology of the IoT could reduce the mortality rate of corn seedlings to 3.59%. The mortality rate of seedlings is much higher than that of farmers relying on their own experience to grow corn. Therefore, this has great reference significance for the innovation and entrepreneurship development of college teachers and students in food security at this stage.

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Foliar application of abscisic acid mitigates cadmium stress and increases food safety of cadmium-sensitive lettuce (Lactuca sativa L.) genotype

Cited by 18 publications

References 57 publications

A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals

A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals

Physiological Mechanism of Exogenous 5-Aminolevulinic Acid Improved the Tolerance of Chinese Cabbage (Brassica pekinensis L.) to Cadmium Stress

Innovation and Entrepreneurship Strategies of Teachers and Students in Financial Colleges and Universities Under the Direction of Food Security

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