Effects of drought and salt stress on seed germination of three leguminous species

Wu, Chunhui

doi:10.5897/ajb11.2018

Cited by 10 publications

(8 citation statements)

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“…This indicates that R. confertus seed can remain ungerminated on the salt-rich soil surface. Reduction in the percentage of germinating seeds induced by an increase in salinity stress was described by numerous authors (e.g., [42–44]). This can be attributed to hyper osmotic stress and/or toxic effects of Na + and Cl − ions, depending on a plant species.…”

Section: Discussionmentioning

confidence: 90%

Effect of Environmental Factors on Germination and Emergence of Invasive Rumex confertus in Central Europe

Kołodziejek

Patykowski

2015

The Scientific World Journal

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Rumex confertus is a biennial species native to Eastern Europe and Asia, where it thrives on meadow-steppes and glades in forest-steppe. This species has increased its range rapidly within central Europe, yet its biology is not well understood, which has led to poorly timed management. Effects of temperature, light, sodium chloride (NaCl), hydrogen ion concentration (pH), potassium nitrate (KNO3), and polyethylene glycol 6000 on seed germination were examined. Seedling emergence was examined for seeds sown at different depths in sand-filled pots. Seeds of R. confertus were nondormant at maturity. The germination percentage and rate of germination were significantly higher in light than in darkness. Secondary dormancy was induced in these seeds by 12 weeks of dark incubation at 4°C. The seeds of R. confertus undergo a seasonal dormancy cycle with deep dormancy in winter and early spring and a low level of dormancy in early autumn. Germination decreased as soil salinity increased. NO3 − increased the percentage and rate of germination in the studied species. Decrease in seedling emergence from the seeds buried at >0.5 cm may be due to deficiency of light. From our experiments, we conclude that the weed R. confertus normally becomes established in vegetation gaps or due to disturbance of the uppermost soil layer during the growing season through the germination of seeds originating from a long-lived seed bank.

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Section: Discussionmentioning

confidence: 90%

Effect of Environmental Factors on Germination and Emergence of Invasive Rumex confertus in Central Europe

Kołodziejek

Patykowski

2015

The Scientific World Journal

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“…However, a transient stomatal regulation led to a slight increase of this parameter in the first 10 days upon stress imposition. This has been interpreted as an adjustment of water loss through transpiration and absorption of CO 2 (Wu et al, 2011). Distinct genotypes revealed significantly different (p < 0.05) water use efficiencies after 15 days of drought imposition, but not on stomatal conductance or net CO 2 assimilation.…”

Section: Could Plant Physiology Be Used To Screen Differently Affectementioning

confidence: 99%

Evaluating stress responses in cowpea under drought stress

Carvalho

Castro

Moutinho-Pereira

et al. 2019

Journal of Plant Physiology

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A B S T R A C TDrought impact on plants is an increasing concern under the climate change scenario. Cowpea (Vigna unguiculata L. Walp.) is considered as one of the most tolerant legume crops to drought, being the search for the best welladapted genotypes crucial to face the future challenges. Different approaches have been used for differentiating plant responses to drought stress. Plants of four cowpea genotypes were submitted to three watering regimens (a severe and moderate drought stress, and well-watered control) during 15 days, and several physiological, biochemical and molecular parameters were evaluated. Stressed plants revealed commonly-described drought stress characteristics, but not all assayed parameters were useful for discriminating plants with different drought severities or genotypes. The analyses which have contributed most to genotype discrimination were those related with stomatal function, and biochemical markers such as proline and anthocyanin contents. Antioxidant enzymes activities and related genes expression did not differed among genotypes or upon drought stress treatments, suggesting that scavenging enzymes are not involved in the differential ability of cowpea plants to survive under drought stress. This information will be useful to evaluate and use genetic resources, as well as design strategies for breeding cowpea resistance to drought stress.

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“…Abiotic stresses, such as drought, salinity and extreme temperatures are becoming, more and more frequently, serious threats to agriculture as effects of climate change [1,2]. Abiotic stresses often account for significant production losses, even halving the potential yields of the majority of staple crops [3][4][5][6]. One of the most important abiotic factors limiting seed germination and early seedling growth is water stress [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Is Drought Stress Tolerance Affected by Biotypes and Seed Size in the Emerging Oilseed Crop Camelina?

et al. 2020

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One of the main advantages of camelina (Camelina sativa (L.) Crantz) is its wide environmental adaptability and extreme drought tolerance. The availability of both winter and spring camelina biotypes, characterized by different seed sizes, raises the question about possible differences in their response to drought stress at the emergence stage. To address this, a germination test was set up in controlled conditions, comparing six winter and six spring genotypes with differing seed sizes (ranging from 1.83 to 0.88 g/1000-seeds) under increasing levels of osmotic stress (0, −0.4, −0.8, −1.2, −1.4, −1.6 MPa) using polyethylene glycol (PEG). Camelina withstands mild level of osmotic stress (−0.4 MPa) without significant decrease in germination. Even at −1.2 MPa after 10 d, it still had 75% germination. Significant differences in germination were observed between biotypes, where spring biotypes performed better than winter ones. Shoot and radicle lengths were significantly diminished by imposed osmotic stress, but shoot growth seemed more impacted. In general, spring biotypes had longer shoots and radicles than winter ones. Seed size played a role in the response of camelina to drought, but it depended on biotype and stress level imposed. In particular large seeded spring types had the highest germination percentage and resulted less impaired by osmotic stress, otherwise among the tested winter types the small seeded ones were the best performing. The presented data could be useful for breeding purposes for selecting the appropriate camelina type for sowing in drought-prone regions.

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Effects of drought and salt stress on seed germination of three leguminous species

Cited by 10 publications

References 0 publications

Effect of Environmental Factors on Germination and Emergence of Invasive Rumex confertus in Central Europe

Effect of Environmental Factors on Germination and Emergence of Invasive Rumex confertus in Central Europe

Evaluating stress responses in cowpea under drought stress

Is Drought Stress Tolerance Affected by Biotypes and Seed Size in the Emerging Oilseed Crop Camelina?

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