Effect of naphthyl acetic acid foliar spray on the physiological mechanism of drought stress tolerance in maize (Zea Mays L.)

Ullah, Sami; Afzal, Ishfaq; Shumaila, Shum; Shah, Wadood

doi:10.1016/j.stress.2021.100035

Cited by 20 publications

(9 citation statements)

References 33 publications

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“…Alongside activating antioxidant systems, oxidative stress instigates the stressed plants to accumulating soluble sugars, proline and soluble proteins to maintain osmoregulation. 72,73 Quantification of antioxidant enzymes indicated that osmotic stress and temperature variations significantly affected the concentration of antioxidant enzymes in fresh plant tissues. The results showed that maximum activity was shown at (15 °C) by CAT and GPX at (−0.6 MPa) while the lowest values of CAT and GPX were recorded at 0 MPa at 35 °C and −0.8 MPa at 35 °C respectively.…”

Section: Discussionmentioning

confidence: 99%

“…The intricate enzymatic and nonenzymatic antioxidative system has developed in plants under stress conditions that reduce the detrimental effects of osmotic stresses by scavenging the reactive oxygen species produced, including APX, catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD). Alongside activating antioxidant systems, oxidative stress instigates the stressed plants to accumulating soluble sugars, proline and soluble proteins to maintain osmoregulation. , Quantification of antioxidant enzymes indicated that osmotic stress and temperature variations significantly affected the concentration of antioxidant enzymes in fresh plant tissues. The results showed that maximum activity was shown at (15 °C) by CAT and GPX at (−0.6 MPa) while the lowest values of CAT and GPX were recorded at 0 MPa at 35 °C and −0.8 MPa at 35 °C respectively.…”

Section: Discussionmentioning

confidence: 99%

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Physiological and Germination Responses of Muskmelon (Cucumis melo L.) Seeds to Varying Osmotic Potentials and Cardinal Temperatures via a Hydrothermal Time Model

Haq,

Ullah,

Amin

et al. 2023

ACS Omega

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Climatic changes have a direct negative impact on the growth, development, and productivity of crops. The water potential (ψ) and temperature (T) are important limiting factors that influence the rate of seed germination and growth indices. To examine how the germination of seed responds to changes in water potential and temperature, the hydrotime model and hydrothermal model (HTT) have been employed. The HTT calculates the concept of germination time across temperatures, between T b–T o, with alteration, and between T b–T c, in supra-optimal ranges. The seeds of Cucumis melo L. were germinated in the laboratory for a hydro-thermal time experiment. Seeds were sown in Petri dishes containing a double-layered filter paper at different osmotic potentials (0, −0.2, −0.4, −0.6, and −0.8 MPa) by providing PEG 6000 (drought stress enhancer) at different temperatures (15, 20, 25, 30, and 35 °C). The controlled replicate was treated with 10 mL of distilled water and the rest with 10 mL of PEG solution. Results indicated that the seed vigor index (SVI–II) was highest at 15 °C with 0 MPa and lowest at 30 °C with −0.2 MPa. However, the highest activity was shown at 15 °C by catalase (CAT) and guaiacol peroxidase (GPX) at (−0.6 MPa), while the lowest values of CAT and GPX were recorded for control at 35 °C with −0.8 MPa at 35 °C, respectively. Germination energy was positively correlated with germination index (GI), germination percentage (G%), germination rate index, seed vigor index-I (SVI–I), mean moisture content (MMC), and root shoot ratio (RSR) and had a negative correlation with mean germination rate, percent moisture content of shoot and root, CAT, superoxide dismutase, peroxidase ascorbate peroxidase, and GPX. In conclusion, thermal and hydrotime models correctly predicted muskmelon germination time in response to varying water potential and temperature. The agronomic attributes were found to be maximum at 30 °C and minimum at 15 °C.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Physiological and Germination Responses of Muskmelon (Cucumis melo L.) Seeds to Varying Osmotic Potentials and Cardinal Temperatures via a Hydrothermal Time Model

Haq,

Ullah,

Amin

et al. 2023

ACS Omega

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“…Disruption in plant growth and physiological activities of are primarily due to abiotic stress. 99,100 These disturbances may occur when the plant is exposed to physical dehydration and the subsequent osmotic effects that block the passage of water in xylem vessels via ion toxicity. 101 We observed a significant reduction in LDW, LAI, and LAR and a nonsignificant decrease in LFW and LMC under boron and salinity stresses.…”

Section: Discussionmentioning

confidence: 99%

Biochar and Seed Priming Technique with Gallic Acid: An Approach toward Improving Morpho-Anatomical and Physiological Features of Solanum melongena L. under Induced NaCl and Boron Stresses

Shumaila

Ullah

Shah³

et al. 2023

ACS Omega

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Dynamic shifts in climatic patterns increase soil salinity and boron levels, which are the major abiotic factors that affect plant growth and secondary metabolism. The present study assessed the role of growth regulators, including biochar (5 g kg −1 ) and gallic acid (GA, 2 mM), in altering leaf morpho-anatomical and physiological responses of Solanum melongena L. exposed to boron (25 mg kg −1 ) and salinity stresses (150 mM NaCl). These growth regulators enhanced leaf fresh weight (LFW) (70%), leaf dry weight (LDW) (20%), leaf area (LA), leaf area index (LAI) (85%), leaf moisture content (LMC) (98%), and relative water content (RWC) (115%) under salinity and boron stresses. Physiological attributes were analyzed to determine the stress levels and antioxidant protection. Photosynthetic pigments were negatively affected by salinity and boron stresses along with a nonsignificant reduction in trehalose, GA, osmoprotectant, and catalase (CAT) and ascorbate peroxidase (APX) activity. These parameters were improved by biochar application to soil and presoaking seeds in GA (p < 0.05) in both varieties of S. melongena L. Scanning electron microscopy (SEM) and light microscopy revealed that application of biochar and GA improved the stomatal regulation, trichome density, epidermal vigor, stomata size (SS) (13 381 μm), stomata index (SI) (354 mm 2 ), upper epidermis thickness (UET) (123 μm), lower epidermis thickness (LET) (153 μm), cuticle thickness (CT) (11.4 μm), trichome density (TD) (23 per mm 2 ), vein islet number (VIN) (14 per mm 2 ), vein termination number (VTN) (19 per mm 2 ), midrib thickness (MT) (5546 μm), and TD (27.4 mm 2 ) under salinity and boron stresses. These results indicate that the use of inexpensive and easily available biochar and seed priming with GA can improve morpho-anatomical and physiological responses of S. melongena L. under oxidative stress conditions.

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“…The population of seeds' MGT represents how quickly they germinated. The mean germination time decreases as the population grows more germinated 19 . f is the number of germinated seeds and x is number of days taken to germination.…”

Section: Methodsmentioning

confidence: 99%

Computing the effects of temperature and osmotic stress on the seed germination of Helianthus annuus L. by using a mathematical model

Javid,

Ullah,

Amin

et al. 2024

Sci Rep

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An extremely important oil crop in the world, Helianthus annuus L. is one of the world's most significant members of the Asteraceae family. The rate and extent of seed germination and agronomic features are consistently affecting by temperature (T) and changes in water potential (ψ). A broad hydrothermal time model with T and ψ components could explain sunflower responses over suboptimal T and ψ. A lab experiment was performed using the HTT model to discover both T and ψ and their interactive effects on sunflower germination and also to figure out the cardinal Ts values. The sunflower seeds were germinated at temperatures (15 °C, 20 °C, 25 °C and 30 °C); each Ts had five constant ψs of 0, 0.3, 0.6, 0.9, and 1.2 MPa via PEG 6000 as osmotic stress inducer. The results revealed that highest germination index was found in seed grown at 20 °C in distilled water (0 MPa) and the lowest at 30 °C with osmotic stress of (− 1.2 MPa). The highest value of germination rate index was found in seed grown at 20 °C in distilled water (0 MPa) and the lowest at 15 °C with an osmotic stress of (− 1.2 MPa). In conclusion, water potential, temperature, and their interactions have a considerable impact on seed germination rate, and other metrics (GI, SVI-I, GRI, GE, SVI-II, and MGT). Seeds sown at 20 °C with zero water potential showed high germination metrics such as GE, GP, GRI, and T50%. The maximum value to TTsub noted at 30 °C in − 0.9 MPa osmotic stress and the minimum value was calculated at 15 °C in − 1.2 MPa osmotic stress. The result of TTsupra recorded highest at 15 °C in controlled group (0 MPa). Moreover, θH was highest at 30 °C in controlled condition (0 MPa) and minimum value was observed at 20 °C under − 1.2 MPa osmotic stress. The value of θHTT were maximum at 30 °C in controlled group (0 MPa) and minimum value was recorded at 15 °C under − 1.2 MPa osmotic potential. The base, optimum and ceiling temperatures for sunflower germination metrics in this experiment were noted 6.8, 20 and 30 °C respectively.

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Effect of naphthyl acetic acid foliar spray on the physiological mechanism of drought stress tolerance in maize (Zea Mays L.)

Cited by 20 publications

References 33 publications

Physiological and Germination Responses of Muskmelon (Cucumis melo L.) Seeds to Varying Osmotic Potentials and Cardinal Temperatures via a Hydrothermal Time Model

Physiological and Germination Responses of Muskmelon (Cucumis melo L.) Seeds to Varying Osmotic Potentials and Cardinal Temperatures via a Hydrothermal Time Model

Biochar and Seed Priming Technique with Gallic Acid: An Approach toward Improving Morpho-Anatomical and Physiological Features of Solanum melongena L. under Induced NaCl and Boron Stresses

Computing the effects of temperature and osmotic stress on the seed germination of Helianthus annuus L. by using a mathematical model

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