Temperature induction response reveals intrinsic thermotolerant genotypes in soybean

Ange, Uwimana Marie; Srividhya, S.; Vijayalakshmi, C.; Boominathan, P.

doi:10.18805/lr.v0iof.9595

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…4B). Lower percent reduction of shoot and root growth in tolerant cultivar over control were recorded in soybean as reported by Ange et al (2016). Demir and Kazim (2008) reported that the higher the osmotic stress concentration the lower was the seedling fresh weight of pepper.…”

Section: Effect Of Peg Mediated Drought Stress On Fresh Weight Of Plu...mentioning

confidence: 74%

Polyethylene glycol mediated drought stress impacts on germination, growth and accumulation of proline in rice (Oryza sativa L.)

2022

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Drought is one of the major stress factors affecting the growth and development of plants, and is responsible for considerable crop yield losses worldwide. An experiment was conducted to compare three rice (Oryza sativa L.) varieties (BRRI dhan49, BRRI dhan71 and BRRI dhan75) for drought tolerance based on some growth parameters and physiological status in germination stage. Drought stress was imposed by five levels of polyethylene glycol (PEG) (0%, 10%, 15%, 20% and 25%). Rice varieties showed good germination with PEG concentration up to 15%. At 20% PEG concentration, a sharp reduction in germination percentage was observed and the highest germination percentage (55.53%) was found in the variety BRRI dhan71. Seeds of all the varieties treated with 25% PEG did not germinate. Seedling growth in terms of plumule and radicle length, fresh weight and dry weight decreased with increasing drought stress in all the varieties. Among the varieties, BRRI dhan71 was found to be the best at 20% PEG for seedling growth. Drought stress treatments decreased seedling length and weight vigor index in rice, whereas the highest seedling length and weight vigor index were obtained from BRRI dhan71. Accumulation of proline increased along with the increase of PEG concentration. The highest proline accumulation (3.08 mmol g-1 leaf) was obtained from the BRRI dhan71 at the higher treatment (20% PEG). This result suggests that BRRI dhan71 showed best performance under drought stress because of its own nature of tolerance. SAARC J. Agric., 20(1): 107-119 (2022)

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Section: Effect Of Peg Mediated Drought Stress On Fresh Weight Of Plu...mentioning

confidence: 74%

Polyethylene glycol mediated drought stress impacts on germination, growth and accumulation of proline in rice (Oryza sativa L.)

2022

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“…These results are evidenced through the phenotype (Fig 4). The technique of TIR allowed for the identification of genetic variations in these genotypes over a limited timeframe, and the assessment of survival rates provided insights into their tolerance levels toward high temperatures, as demonstrated in this study (Ange et al, 2016;Chandola et al, 2016).…”

Section: (B) Response Of Contrasting Genotypes To Temperature Inducti...mentioning

confidence: 85%

“…This method involves gradually elevating the temperature during the acclimation phase, with the aim of enhancing high-temperature tolerance. This acclimation process is expected to lead to improved survival and growth at elevated temperatures, particularly for the genotypes known for their tolerance (Ange et al, 2016). Notably, the genotypes GE-845 and KMR-630, which had already demonstrated tolerance to osmotic stress, were also found to exhibit tolerance to high-temperature acclimation (Fig 3).…”

Section: (B) Response Of Contrasting Genotypes To Temperature Inducti...mentioning

confidence: 98%

Physiological basis of Moisture Stress Tolerance at Heterotrophic and Flowering Stage in Finger Millet (Eleusine coracana L.)

Mohan,

Reddy

2023

MAJ

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Finger millet is a nutritionally rich millet crop, predominantly cultivated under rainfed conditions worldwide. The crop's productivity is subject to diverse environmental stresses. The study's principal objective was to evaluate the underlying physiological distinctions among tolerant genotypes (GE-845, KMR-630) and susceptible genotypes (GE-1309, GE-5123) of finger millet. The studies focus on specific morphological, physiological, and biochemical traits contributing to drought tolerance at the heterotrophic and flowering stages, utilizing polyethylene glycol (PEG) and a phenotyping platform facility, respectively. Our findings highlight KMR-630 as the most drought-tolerant genotype, while GE-5123 exhibits pronounced drought susceptibility. Notably, the drought-tolerant KMR-630 genotype exhibits robust seedling vigour during the heterotrophic stage, maintains higher relative water content, increased total chlorophyll levels, mitigated membrane damage, and demonstrates enhanced finger length and above-ground dry matter compared to sensitive genotypes at the flowering stage. These insights offer valuable guidance for developing effective breeding strategies aimed at producing drought tolerant finger millet genotypes.

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Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets

Seymour,

Mercedes,

Fang

2024

Folia Horticulturae

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Strawberry production is facing a serious decline with the increase in global temperature as a result of climate change. Improving the heat tolerance is imperative for the strawberry plants to remain productive under high temperature conditions. The present work aimed to study the effect of heat acclimation on the thermotolerance of strawberry plants subjected to severe heat stress. Tissue cultured Fragaria ‘Taoyuan No. 1’ plantlets were subjected to four heat-acclimation treatments with gradual increase of temperatures from 30°C to 42°C for 1.25 hr to 10 hr before exposing them to the lethal temperature of 48°C for 4 hr. Survival, new leaf emergence and root growth, electrolyte leakage, chlorophyll and proline contents, as well as antioxidant enzyme activities were compared between the control, acclimated and non-acclimated plantlets. Results indicated that heat acclimation was required for the strawberry plantlets to survive under lethal temperature conditions. The acclimated plantlets registered a lower degree of electrolyte leakage and chlorophyll degradation, and a higher proline content compared to the non-acclimated plantlets. The activities of the antioxidant enzymes increased with the elevation of acclimation temperature and peaked at 42°C except for ascorbate peroxidase (APX) whose activity peaked at 39°C. Higher activities of superoxide dismutase (SOD), APX, glutathione reductase (GR), catalase (CAT) and peroxidase (POD) were observed in the acclimated plantlets compared to the non-acclimated plantlets. This study demonstrates that heat acclimation improved the thermotolerance of in vitro strawberry plantlets by reducing electrolyte leakage and chlorophyll degradation, as well as by enhancing proline content and antioxidant enzyme activities under severe heat stress.

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Temperature induction response reveals intrinsic thermotolerant genotypes in soybean

Cited by 3 publications

References 13 publications

Polyethylene glycol mediated drought stress impacts on germination, growth and accumulation of proline in rice (Oryza sativa L.)

Polyethylene glycol mediated drought stress impacts on germination, growth and accumulation of proline in rice (Oryza sativa L.)

Physiological basis of Moisture Stress Tolerance at Heterotrophic and Flowering Stage in Finger Millet (Eleusine coracana L.)

Effect of heat acclimation on thermotolerance of in vitro strawberry plantlets

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