Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Partheeban, C.; Chandrasekhar, C. N.; Jeyakumar, P.; Ravikesavan, R.; Gnanam, R.

doi:10.20546/ijcmas.2017.605.119

Cited by 32 publications

(18 citation statements)

References 14 publications

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“…There was a drastic decline in the percentage of normal seedlings for HT2 at -0.9 MPa, likely as a result of the damage to different physiological processes as a function of the lower water availability in the substrate. Similar trends have been reported by other researchers, who found a significant decline in the germination capacity of maize seeds as a function of reduced osmotic potential caused by polyethylene glycol 6000, helping to identify drought-resistant maize genotypes (Khayatnezhad, Gholamin, Jamaati-e-Somarin, & Zabihi-e-Mahmoodabad, 2010;Vaz-de-Melo et al, 2012;Abreu et al, 2014;Partheeban, Chandrasekhar, Jeyakumar, Ravikesavan, & Gnanam, 2017), as observed in the present study.In hydration with water, hybrid HT1 achieved protrusion in 36 hours and HT2 achieved protrusion in 48 hours; at -0.3 MPa, HT1 obtained protrusion in 48 hours and HT2 in 96 hours; and at -0.9 MPa, protrusion occurred in 72 and 168 hours for HT1 and HT2, respectively. According to Prazeres and Coelho (2017), root protrusion was achieved in less time in the high vigor hybrid (HT1) than its low vigor counterpart (HT2) for all of the osmotic potentials.…”

Section: Resultssupporting

confidence: 92%

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Prazeres¹,

Coelho²

2020

Acta Sci. Agron.

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The objective of this work was to evaluate the alterations of antioxidant enzyme reserves and antioxidant enzymes during germination under water deficit in maize hybrids and to associate with seed vigor, determining the mechanisms related to tolerance for this stress. Two three-way maize hybrids were characterized by their vigor at different levels of water deficit induced by polyethylene glycol 6000. Next, the seeds were hydrated at different osmotic potentials (0.0, -0.3, and -0.9 MPa) and removed at different times to assess the levels of the total soluble protein, total soluble sugars, proline, starch, and antioxidant enzymes, such as superoxide dismutase, catalase and ascorbate peroxidase. The analysis of variance, Tukey test at 5% and principal component analysis (PCA) were used. The vigorous hybrid (HT1) was more efficient than the low vigor hybrid seeds (HT2) in mobilizing the total soluble protein during the initial stages of germination and the total soluble sugars before and after root protrusion under water deficit in addition to increasing the catalase activity at the different osmotic potentials that were assessed.

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Section: Resultssupporting

confidence: 92%

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Prazeres¹,

Coelho²

2020

Acta Sci. Agron.

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“…Similar results were obtained by Elocka [9] in pea where priming treatments with 1%, 2% and 3% mannitol had no significant effect on germination percentage. Present results are in line with Partheeban, et al [10] reported that there was a decrease in germination percentage of three different varieties of maize with increase in the water stress levels. with Jorenush and Rajabi [11] who reported that germination rate decreased with increasing drought in artichoke where highest germination rate was found in control treatment and the lowest was zero in highest level of stress induced by 25% PEG.…”

Section: Germination Percentagesupporting

confidence: 93%

Influence of Mannitol Priming on Maize Seeds Under Induced Water Stress

Dhakal¹,

Subedi²

2020

JAC

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Drought stress is seen as the major abiotic stress in the modern day agriculture and hinders crop germination and seedling establishment and maize suffers the problem more as a summer season crop. Priming is a physiological method to overcome such deleterious effect of water stress with the main aim of increasing the germination of seed. A lab experiment was therefore performed with maize seed priming using Mannitol @ 0%, 2%, 4%, 6% and 8% (w/v) concentrations subjected to germination under induced drought of 0 Mpa, 0.15 Mpa, 0.5 MPa, 1.0 MPa and 1.7 MPa using NaCl. The experiment was laid in completely randomized design (CRD) with three replications. Priming with mannitol reduced the Mean Germination Time (MGT); the best result obtained in seeds primed with 2% mannitol. However, the final germination count, Relative Water Content (RWC) and root and shoot length remained unaltered. Germination activities reduced with increasing moisture stress. The study indicated that priming with mannitol could improve the speed of germination in maize seeds.

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“…It directly scavenges the ROS or managing the non-enzymatic defense as indirect protection [8] [11] [12]. [15]. It is a cosmopolitan plant with a wide-grown spectrum of climatic and soil conditions [11] [15].…”

Section: Introductionmentioning

confidence: 99%

“…[15]. It is a cosmopolitan plant with a wide-grown spectrum of climatic and soil conditions [11] [15]. Madura maize is one of the indigenous maize from Indonesia.…”

Section: Introductionmentioning

confidence: 99%

Impact of Drought Stress during Germination on Antioxidant Capacities and Antioxidant Enzymes Activities of Madura Local Maize (<i>Zea mays</i>) Seeds

Dani¹,

Siswoyo²

2019

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The effect of various polyethylene glycol (PEG) concentrations to induced drought stress on the antioxidant capacities and antioxidant enzyme activities was investigated on Madura local maize during germination. Seed samples were treated under 5%, 10%, and 15% of PEG for 6 days. The changes in the antioxidant capacities such as 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) and hydroxyl radical scavenging; antioxidant enzyme activities including catalase (CAT) and ascorbate peroxidase (APX) and gene expression were observed during seeds germination. The result showed the antioxidants capacities and enzyme activities exhibited a significantly higher level in drought-treated. The most effective level of drought stress to elevate the capabilities and enzyme activity of antioxidant as well as it gene expression was observed at 15% PEG, whereas ABTS scavenging activity was increased 20% over the control, hydroxyl scavenging activity up to 14%, CAT and APX activity increased 4 -5 times over the control. Along with the presence of antioxidant mechanisms, including the capacities and activities of different types of ABTS + , hydroxyl, CAT, and APX might play important roles during the germination phase and be able to manage reactive oxygen species to the normal level under stress condition.

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Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Cited by 32 publications

References 14 publications

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Influence of Mannitol Priming on Maize Seeds Under Induced Water Stress

Impact of Drought Stress during Germination on Antioxidant Capacities and Antioxidant Enzymes Activities of Madura Local Maize (<i>Zea mays</i>) Seeds

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Effect of PEG Induced Drought Stress on Seed Germination and Seedling Characters of Maize (Zea mays L.) Genotypes

Cited by 32 publications

References 14 publications

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Influence of Mannitol Priming on Maize Seeds Under Induced Water Stress

Impact of Drought Stress during Germination on Antioxidant Capacities and Antioxidant Enzymes Activities of Madura Local Maize (&lt;i&gt;Zea mays&lt;/i&gt;) Seeds

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Impact of Drought Stress during Germination on Antioxidant Capacities and Antioxidant Enzymes Activities of Madura Local Maize (<i>Zea mays</i>) Seeds