Changes in Germination and Seedling Traits of Sesame under Simulated Drought

Ahmed, Mukhtar; Kheir, Ahmed M. S.; Mehmood, Muhammad Zeeshan; Ahmad, Shakeel; Hasanuzzaman, Mirza

doi:10.32604/phyton.2022.018552

Cited by 13 publications

(5 citation statements)

References 50 publications

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“…Fresh and dry weight are important indicators of plant dry matter accumulation, and the magnitude of their values can reflect whether the plant is absorbing water normally. Earlier reduction in plant biomass due to PEG-induced drought was reported in tomato [ 29 ] and sesame [ 30 ] plants, and it was more pronounced with increasing concentrations of PEG. Under drought stress, Triticale hexaploid L. showed a significant reduction in fresh and dry weight compared with the control group [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Drought Stress Induced by Hypertonic Polyethylene Glycol (PEG-6000) on Passiflora edulis Sims Physiological Properties

Ying

Ghani

et al. 2023

Plants

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Passion fruit is known to be sensitive to drought, and in order to study the physiological and biochemical changes that occur in passion fruit seedlings under drought stress, a hypertonic polyethylene glycol (PEG) solution (5%, 10%, 15%, and 20%) was used to simulate drought stress in passion fruit seedlings. We explored the physiological changes in passion fruit seedlings under drought stress induced by PEG to elucidate their response to drought stress and provide a theoretical basis for drought-resistant cultivation of passion fruit seedlings. The results show that drought stress induced by PEG had a significant effect on the growth and physiological indices of passion fruit. Drought stress significantly decreased fresh weight, chlorophyll content, and root vitality. Conversely, the contents of soluble protein (SP), proline (Pro), and malondialdehyde (MDA) increased gradually with the increasing PEG concentration and prolonged stress duration. After nine days, the SP, Pro and MDA contents were higher in passion fruit leaves and roots under 20% PEG treatments compared with the control. Additionally, with the increase in drought time, the activities of antioxidant enzymes such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) showed an increasing trend and then a decreasing trend, and they reached the highest value at the sixth day of drought stress. After rehydration, SP, Pro and MDA contents in the leaves and roots of passion fruit seedlings was reduced. Among all the stress treatments, 20% PEG had the most significant effect on passion fruit seedlings. Therefore, our study demonstrated sensitive concentrations of PEG to simulate drought stress on passion fruit and revealed the physiological adaptability of passion fruit to drought stress.

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Section: Discussionmentioning

confidence: 99%

Effects of Drought Stress Induced by Hypertonic Polyethylene Glycol (PEG-6000) on Passiflora edulis Sims Physiological Properties

Ying

Ghani

et al. 2023

Plants

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“…Drought is one of the most frequently occuring and serious natural disasters affecting crop growth. Drought adversely affects the growth or yield of crops during the entire growth period, and the water deficit in the seedling stage will lead to slow plant growth and weak seedlings [ 25 ]. Drought stress at the seedling stage decreases plant height and leaf area [ 26 ] and significantly inhibits dry weight accumulation [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Mechanism of Mepiquat Chloride Regulating Soybean Response to Drought Stress Revealed by Proteomics

Dong,

Wang,

et al. 2023

Plants

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Soybeans are the main sources of oil and protein for most of the global population. As the population grows, so does the demand for soybeans. However, drought is a major factor that limits soybean production. Regulating soybean response to drought stress using mepiquat chloride (MC) is a feasible method; however, its mechanism is still unclear. This study used PEG-6000 to simulate drought stress and quantitative proteomic techniques to reveal changes in Heinong44 (HN44) and Heinong65 (HN65) subjected to drought following the application of 100 mg/L of MC. The results showed that SOD in HN44 did not change significantly but decreased by 22.61% in HN65 after MC pretreatment, and MDA content decreased by 22.75% and 21.54% in HN44 and HN65, respectively. Furthermore, MC improved the GSH–ASA cycle and simultaneously promoted the Calvin cycle process to enable the plant to maintain a certain carbon assimilation rate under osmotic stress. In addition, MC upregulated some proteins during gluconeogenesis and starch metabolism and increased soluble sugar content by 8.41% in HN44. MC also reduced ribosomal protein abundance, affecting translation and amino acid metabolism. In summary, MC improved GSH–ASA cycle and Calvin cycle under stress to alleviate oxidative damage and maintain crop growth. Our study is the first to report the mechanism of MC regulation in soybean under osmotic stress, providing new insights for the rational application of MC in soybean.

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“…Nevertheless, such undesirable consequences of fungicide applications, leading to potential plant weakening, should be always taken into consideration when scheduling an application. While chlorothalonil and ASM are proven to be generally safe under field conditions (Jespersen & Huang, 2017), the possibility of fungicide phytotoxicity (e.g., benzimidazoles) has been documented in turf, ornamental plants and other agricultural crops (Ahmed et al., 1983; Mihuta‐Grimm et al., 1990; van Iersel & Bugbee, 1996; Garcia et al., 2003), especially when applications were made on extremely stressed turf. Although Jespersen et al.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, such undesirable consequences of fungicide applications, leading to potential plant weakening, should be always taken into consideration when scheduling an application. While chlorothalonil and ASM are proven to be generally safe under field conditions , the possibility of fungicide phytotoxicity (e.g., benzimidazoles) has been documented in turf, ornamental plants and other agricultural crops (Ahmed et al, 1983;Mihuta-Grimm et al, 1990;van Iersel & Bugbee, 1996;Garcia et al, 2003), especially when applications were made on extremely stressed turf. Although found that ASM preserved TQ of heat and drought exposed CBG plants grown in a controlled environment, when severe water deficit was introduced to the plant material, TQ of ASM treated plants significantly deteriorated when compared to nontreated plants maintained under optimal growing conditions.…”

Section: O R C I Dmentioning

confidence: 99%

Effects of fungicides on creeping bentgrass health and rooting characteristics under abiotic stress

Schiavon

Petelewicz

Orliński

et al. 2021

Intl Turfgrass Soc Res J

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Positive effects on plant health provided by quinone outside inhibitors (QoI) and other fungicide classes have been previously reported in turfgrass and other agricultural crops. However, most of the research was conducted under controlled environmental rather than field conditions. Two field and one greenhouse experiments were conducted and repeated in southern California from 2011-2013 to test the ability of selected fungicides to retain or improve creeping bentgrass (Agrostis stolonifera L.; CBG) quality and rooting characteristics when exposed to drought stress induced by multiple abiotic stressors, including, heat and traffic. Fungicide treatments were applied on 14-d or 28-d intervals prior to and during implemented stress periods for a total of 2-5 applications and consisted of azoxystrobin, chlorothalonil + acibenzolar-S-methyl (ASM), fluoxastrobin, aluminum tris, penthiopyrad, pyraclostrobin, pyraclostrobin + boscalid tested against a nontreated control (NTC). No disease symptoms were present in any trial site, but the presence of turfgrass pathogens was not determined. Although increased root diameter in comparison to NTC was observed in plants treated with azoxystrobin and pyraclostrobin + boscalid, and increased root volume was observed in pyraclostrobin + boscalid in the greenhouse study, no significant differences in rooting characteristics were found in the field studies. Moreover, none of the fungicide treatments improved turf quality or normalized difference vegetation index (NDVI) in any of the experiments. Results imply that fungicides offer little to no secondary benefits in regard to abiotic stress such as drought alleviation in arid environments, when disease pressure is minimal or absent.

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Changes in Germination and Seedling Traits of Sesame under Simulated Drought

Cited by 13 publications

References 50 publications

Effects of Drought Stress Induced by Hypertonic Polyethylene Glycol (PEG-6000) on Passiflora edulis Sims Physiological Properties

Effects of Drought Stress Induced by Hypertonic Polyethylene Glycol (PEG-6000) on Passiflora edulis Sims Physiological Properties

Mechanism of Mepiquat Chloride Regulating Soybean Response to Drought Stress Revealed by Proteomics

Effects of fungicides on creeping bentgrass health and rooting characteristics under abiotic stress

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