Effects of Exogenous 5-Aminolevulinic Acid and 24-Epibrassinolide on Cd Accumulation in Rice from Cd-Contaminated Soil

Wang, Feijuan; Yiting, Zhang; Qinxin, Guo; Tan, Haifeng; Han, Jing; Lin, Haoran; Wei, Hewen; Xu, Guangwei; C, Zhu

doi:10.1016/j.rsci.2018.10.002

Cited by 15 publications

(2 citation statements)

References 68 publications

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“…Under NaCl stress, both nitrogen fertilizer treatment and foliar spraying of both PGRs improves the salt tolerance of seedlings, increasing seedling height, leaf area, and aboveground fresh weight, and dry weight (Figure 1 and Table 2). Thus, seedling growth was enhanced and NaCl stress was partially alleviated, which is consistent with a previous study reporting that the exposure to nitrogen fertilizer, 5-ALA, and DTA-6 promoted plant growth under adverse conditions [56]. Overall, 5-ALA appears to be slightly superior to DTA-6 in improving rice morphology, and the effects of leaf spraying of both GPRs on rice seedling morphology were comparable to those of an additional 0.05 g of pure nitrogen per pot.…”

Section: Effects Of Nacl Stress On Rice Seedling Morphology and The R...supporting

confidence: 92%

5-ALA, DTA-6, and Nitrogen Mitigate NaCl Stress by Promoting Photosynthesis and Carbon Metabolism in Rice Seedlings

Wang,

Tan,

et al. 2024

Metabolites

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A large number of dead seedlings can occur in saline soils, which seriously affects the large-scale cultivation of rice. This study investigated the effects of plant growth regulators (PGRs) and nitrogen application on seedling growth and salt tolerance (Oryza sativa L.), which is of great significance for agricultural production practices. A conventional rice variety, “Huang Huazhan”, was selected for this study. Non-salt stress treatments included 0% NaCl (CK treatment), CK + 0.05 g N/pot (N treatment), CK + 40 mg·L−1 5-aminolevulinic acid (5-ALA) (A treatment), and CK + 30 mg·L−1 diethylaminoethyl acetate (DTA-6) (D treatment). Salt stress treatments included 0.3% NaCl (S treatment), N + 0.3% NaCl (NS treatment), A + 0.3% NaCl (AS treatment), and D + 0.3% NaCl (DS treatment). When 3 leaves and 1 heart emerged from the soil, plants were sprayed with DTA-6 and 5-ALA, followed by the application of 0.3% NaCl (w/w) to the soil after 24 h. Seedling morphology and photosynthetic indices, as well as carbohydrate metabolism and key enzyme activities, were determined for each treatment. Our results showed that N, A, and D treatments promoted seedling growth, photosynthesis, carbohydrate levels, and the activities of key enzymes involved in carbon metabolism when compared to the CK treatment. The A treatment had the most significant effect, with increases in aboveground dry weight and net photosynthetic rates (Pn) ranging from 17.74% to 41.02% and 3.61% to 32.60%, respectively. Stomatal limiting values (Ls) significantly decreased from 19.17% to 43.02%. Salt stress significantly inhibited seedling growth. NS, AS, and DS treatments alleviated the morphological and physiological damage of salt stress on seedlings when compared to the S treatment. The AS treatment was the most effective in improving seedling morphology, promoting photosynthesis, increasing carbohydrate levels, and key enzyme activities. After AS treatment, increases in aboveground dry weight, net photosynthetic rate, soluble sugar content, total sucrose synthase, and amylase activities were 17.50% to 50.79%, 11.39% to 98.10%, 20.20% to 80.85%, 21.21% to 33.53%, and 22.17% to 34.19%, respectively, when compared to the S treatment. In summary, foliar sprays of 5-ALA, DTA-6, and additional nitrogen fertilizer enhanced rice seedling growth, increased photosynthesis, lowered Ls values, and improved seedling salt tolerance. Spraying two regulators, 5-ALA and DTA-6, quantitatively increased the effect of nitrogen fertilizer, with comparable effects on NaCl stress regulation. This study provides the basis for efficient agricultural production.

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Section: Effects Of Nacl Stress On Rice Seedling Morphology and The R...supporting

confidence: 92%

5-ALA, DTA-6, and Nitrogen Mitigate NaCl Stress by Promoting Photosynthesis and Carbon Metabolism in Rice Seedlings

Wang,

Tan,

et al. 2024

Metabolites

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“…The conflicting results await further clarification. In rice, 100 mg L −1 ALA significantly reduces the Cd content in leaves, culms, and brown rice [209], suggesting that ALA may be used to increase the safe production of rice in Cd-polluted farmland. However, in sunflowers, ALA cannot only improve the growth of plants under Cd stress but also increase the Cd content in plant tissues [210], suggesting it is a cadmium accumulator.…”

Section: Toxic Metal Stressesmentioning

confidence: 99%

Regulation of 5-Aminolevunilic Acid and Its Application in Agroforestry

Wang,

Zhang,

Zhong

et al. 2023

Forests

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The review briefly introduces the natural occurrence, physicochemical properties, and biosynthesis of 5-aminolevuinic acid (ALA) and highlights a variety of applications in the planting industry and its possible mechanisms. It has been known that ALA can be used as biological pesticides, fungicides, and herbicides when the concentrations are higher than 838 mg L−1 (about 5 mmol L−1). When ALA concentrations are 100–300 mg L−1, it can be used to thin surplus flowers in the spring of orchards and promote fruit coloration before maturation. When the concentrations are lower than 100 mg L−1, especially not higher than 10 mg L−1, ALA can be used as a new plant growth regulator to promote seed germination, plant (including root and shoot) growth, enhance stress tolerance, increase crop yield, and improve product quality. In photosynthesis, ALA is involved in the regulation of the whole process. In stress tolerance, ALA induces plant preventive and protective systems through the NO/H2O2 signaling network. In secondary metabolism, ALA regulates many gene expressions encoding transcription factors or function proteins to promote anthocyanin and flavonol biosynthesis and accumulation. In general, ALA promotes plant health and robustness, reduces the use of chemical fertilizers and pesticides—which is conducive to improving the ecological environment, human production, and living conditions—and has a broad application prospect in agroforestry production. As a new plant growth regulator with multiple and powerful functions, the underlying regulatory mechanisms need more study.

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Exogenous 5-aminolevulinic acid promotes plant growth and salinity tolerance of grape rootstocks in coastal areas

Zheng

Tian

Shi

et al. 2023

Hortic. Environ. Biotechnol.

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Effects of Exogenous 5-Aminolevulinic Acid and 24-Epibrassinolide on Cd Accumulation in Rice from Cd-Contaminated Soil

Cited by 15 publications

References 68 publications

5-ALA, DTA-6, and Nitrogen Mitigate NaCl Stress by Promoting Photosynthesis and Carbon Metabolism in Rice Seedlings

5-ALA, DTA-6, and Nitrogen Mitigate NaCl Stress by Promoting Photosynthesis and Carbon Metabolism in Rice Seedlings

Regulation of 5-Aminolevunilic Acid and Its Application in Agroforestry

Exogenous 5-aminolevulinic acid promotes plant growth and salinity tolerance of grape rootstocks in coastal areas

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