Effects of exogenous melatonin on physiology and yield of soybean during seed filling stage under drought stress

Zou, Jingnan; Yu, Qi; Jin, Xijun; Wang, Mingyao; Qin, Bin; Ren, Chen-Xi; Wang, Mengxue; Zhang, Yuxian

doi:10.3724/sp.j.1006.2020.94111

Cited by 9 publications

(9 citation statements)

References 5 publications

(5 reference statements)

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“…However, the root system of soybeans is underdeveloped, while water demand during the plant life cycle is high. Indeed, the root system is more sensitive to adverse conditions, such as drought, which may cause yield losses ranging from 25 to 50% (Zou et al, 2020). Furthermore, the soybean plant is most sensitive to water deficit during the flowering period, when water shortage will most seriously affect yield.…”

Section: Introductionmentioning

confidence: 99%

Physiological Response of Soybean Plants to Water Deficit

Wang

Zhou

et al. 2022

Front. Plant Sci.

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Soybean is an important cash crop in the world, and drought is the main reason for the loss of soybean plants productivity, with drought stress during the most water-sensitive flowering period of soybeans. In this article, drought-tolerant variety Heinong 44 (HN44) and drought-sensitive variety Heinong 65 (HN65) were used as experimental materials. Drought treatment was carried out at the early flowering stage. The method of controlling soil moisture content was used to simulate different degrees of drought, and the physiological changes of these two varieties of soybean under different soil moisture contents were studied. The results showed that with a decrease in soil moisture content, the content of malondialdehyde (MDA) in soybean leaves increased significantly; the activities of peroxidase (POD), catalase (CAT), and ascorbic acid peroxidase (APX) increased first and then decreased; the content of proline, soluble sugar, and soluble protein increased; and the total antioxidant capacity (T-AOC) increased significantly. When the soil moisture content was 15.5%, the degree of membrane lipid peroxidation, osmotic regulatory substances, antioxidant enzyme activity, and T-AOC increased the most, and the decrease in drought-tolerant variety HN44 was significantly less than that of drought-sensitive variety HN65. Our research reveals the response law of soybean crops to physiological characteristics under water deficit and provides theoretical basis and guiding significance for drought-resistant cultivation and breeding of soybean.

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Section: Introductionmentioning

confidence: 99%

Physiological Response of Soybean Plants to Water Deficit

Wang

Zhou

et al. 2022

Front. Plant Sci.

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“…Drought, one of the typical abiotic stresses, is the most important factor affecting the crop yield and quality [ 6 ]. Zou et al [ 7 ] found that the yield loss of soybean caused by drought could reach 25–50%. According to the occurrence of drought and the degree of impact, with reference to “Grade of agricultural drought” [ 8 ], the water potential is an important basis for judging the level of drought.…”

Section: Introductionmentioning

confidence: 99%

Effects of Weak and Strong Drought Conditions on Physiological Stability of Flowering Soybean

Song

Zhou

et al. 2022

Plants

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Soybean is an important food crop in the world. Drought can seriously affect the yield and quality of soybean; however, studies on extreme drought—weak and strong—are absent. In this study, drought-tolerant soybean Heinong 44 (HN44) and sensitive soybean Heinong 65 (HN65) were used as the test varieties, and the effects of strong and weak droughts on the physiological stability of soybean were explored through the drought treatment of soybean at the early flowering stage. The results showed that the contents of malondialdehyde (MDA), hydrogen peroxide (H2O2), and superoxide anions () increased with the increase in the degree of drought. The plant height and relative water content decreased, and photosynthesis was inhibited. The activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and the total antioxidant capacity (T-AOC) showed a trend of first increasing and then decreasing. Through contribution analysis, CAT changed the most, and the role of SOD gradually increased with the aggravation of drought. With the aggravation of drought, the contents of soluble sugar (SSC) and proline (Pro) increased gradually, and the content of soluble protein (SP) increased initially and then decreased. According to contribution analysis, SSC had the highest contribution to osmotic adjustment. SSC and Pro showed an upward trend with the aggravation of drought, indicating that their role in drought was gradually enhanced.

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“…In recent years, melatonin has been widely used as a protective agent against multiple stresses including unfavourable salt concentrations, ultraviolet radiation, toxic chemicals, extreme temperature, osmotic stress, pathogen infection, and nutritional defects (Zhang et al 2017a;Fan et al 2018;Bawa et al 2020;Mohamed et al 2020;Zhang et al 2020). Under abiotic stress including drought, the alleviation effect of melatonin on plant growth may also be attributed to its regulation of carbon and nitrogen metabolism (Cao et al 2019;Zou et al 2020). Some studies have pointed out that melatonin could play a role in plants by enhancing cell division, promoting photosynthesis and carbohydrate synthesis, and other carbon metabolic pathways (Wei et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The mechanisms underlying melatonin improved soybean seedling growth at different nitrogen levels

Wang

Ren

Cao

et al. 2021

Functional Plant Biol.

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To investigate the function of melatonin (MT) on nitrogen uptake and metabolism in soybean, six groups of treatments, with and without 100 μM melatonin were conducted at low, normal, and high nitrogen levels (1.5, 7.5, and 15 mM, respectively). The related indexes of nitrogen metabolism and the antioxidant system of seedlings were measured and analysed. Results indicated that MT could enhance the level of nitrogen metabolism by upregulating the coding genes of enzymes related to nitrogen metabolism and increasing total nitrogen content, especially under low nitrogen levels. Under high nitrogen conditions, the addition of MT not only accelerated ammonium assimilation and utilisation by enhancing the activity of glutamine synthetase involved in ammonium assimilation, but also reduced the extent of membrane lipid peroxidation to alleviate the degree of damage by improving the activity of antioxidant enzymes. In addition, MT enhanced soybean growth with positive effects in morphological changes at different nitrogen levels, including significantly increased stem diameter, total leaf area, and root nodule number, and biomass accumulation. Finally, biomass accumulation increased under low, normal, and high nitrogen levels by 9.80%, 14.06%, and 11.44%, respectively. The results suggested that MT could enhance the soybean tolerance to low and excessive N treatments.

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Effects of exogenous melatonin on physiology and yield of soybean during seed filling stage under drought stress

Cited by 9 publications

References 5 publications

Physiological Response of Soybean Plants to Water Deficit

Physiological Response of Soybean Plants to Water Deficit

Effects of Weak and Strong Drought Conditions on Physiological Stability of Flowering Soybean

The mechanisms underlying melatonin improved soybean seedling growth at different nitrogen levels

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