Effects of drought-stress on seed germination and growth physiology of quinclorac-resistant Echinochloa crusgalli

Effects of drought stress on the seed germination and physiological characteristics of amaranth were investigated. The results were as follows: the germination rate and germination potential of amaranth decreased with the increasing of PEG-6000 concentrations. Meanwhile, the root length, shoot length and peroxidase (POD) activity were significantly increased at lower PEG-6000 concentrations, but then decreased with the increasing of PEG-6000. Malondialdehyde (MDA) content, proline content and superoxide dismutase (SOD) activity were all significantly increased under drought stress, and reached the top at 20% PEG-6000. These findings indicated that amaranth tolerates drought stress through increasing the activities of SOD and POD and accumulating proline content.

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Effects of drought stress simulated by peg on seed germination of two ecotypes of ceratoides arborescens

Mongolian Journal of Agricultural Sciences ◽

10.5564/mjas.v17i1.719 ◽

2017 ◽

Vol 17 (1) ◽

pp. 3-9 ◽

Cited By ~ 1

Author(s):

Qing Ge-le ◽

N Togtokhbayar ◽

Wang Yu-Zhi ◽

Sun Jie ◽

V Enkhchimeg

Keyword(s):

Drought Stress ◽

Seed Germination ◽

Osmotic Potential ◽

Primary Root ◽

Fine Sand ◽

Optimal Conditions ◽

Significant Difference ◽

Survival And Development ◽

Effects Of Drought ◽

Arid Desert

Ceratoides arborescens is widely distributed in arid area of Inner Mongolia. They are fine sand binding plants, and the main feed of livestock in arid desert area in the dry season. Under drought stress, seed germination and seedling root growth is very important to the survival and development of plant seedlings. Therefore our main objective of this study was to determine the effects of drought stress on seed germination and seedling growth of two ecotypes, Wu and Kerqin, of Ceratoides arborescens. The effects of drought stress on seed germination under PEG treatment and germination recovery under optimal conditions after presoaking with PEG solution were studied in a series of laboratory tests. The germination and radical growth of the two ecotype Wu and Kerqin of Ceratoides arborescens were studied to different degrees of inhibition with reduced osmotic potential of a series of PEG solutions. However, slight drought stress promoted the seed germination of the two ecotype Wu and Kerqin of Ceratoides arborescens and improved the germination index of the two ecotypes, simulating the radical growth. The lowest osmotic potential for germination was -2.1MPa for Kerqin and -1.8MPa for Wu. The result shows that the drought resistance of seed germination of Kerqin was stronger than that of Wu.Under optimal conditions, the seeds presoaked with PEG solution recovered their germination after drought stress was relived. The seeds presoaked longer, suffered greater from drought stress and germination was suppressed completely. The radical length of the primary root of the two species had no significant difference between the CK after presoaking with PEG solution in 3d，and then decreased significantly with the increase of days of presoaking.

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Alleviation of adverse effects of drought stress on wheat seed germination using atmospheric dielectric barrier discharge plasma treatment

Scientific Reports ◽

10.1038/s41598-017-16944-8 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 27

Author(s):

Qiao Guo ◽

Ying Wang ◽

Haoran Zhang ◽

Guangzhou Qu ◽

Tiecheng Wang ◽

...

Keyword(s):

Drought Stress ◽

Seed Germination ◽

Discharge Plasma ◽

Barrier Discharge ◽

Wheat Seed ◽

Dielectric Barrier Discharge Plasma ◽

Dielectric Barrier ◽

Barrier Discharge Plasma ◽

Effects Of Drought ◽

Atmospheric Dielectric Barrier Discharge

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Effects of Exogenous Calcium on Datura Seed Germination under Drought Stress

Journal of Botanical Research ◽

10.30564/jrb.v1i2.862 ◽

2019 ◽

Vol 1 (2) ◽

Author(s):

Yongji Wang

Keyword(s):

Drought Stress ◽

Seed Germination ◽

Germination Rate ◽

Inhibitory Effect ◽

Control Group ◽

High Concentration ◽

Moisture Condition ◽

Moderate Drought ◽

Exogenous Calcium ◽

Effects Of Drought

With polyethylene glycol (PEG-6000), of 0% (CK), 5%, 10%, 15%, 25% used to simulate drought stress, and CaCl2 concentration 0 (CK), of 15, 20, 25 and 30mmol/L as ion gradient of exogenous calcium, the effects of drought, exogenous calcium and the interaction between the two on the Datura seed germination, so as to explore the optimal application amount of exogenous calcium to ease the suppression of drought stress on Datura seed germination. The results showed that the germination rate, germination potential and germination index of the Datura seeds were significantly lower than those of the control group. Under the normal moisture condition, exogenous calcium of moderate and low concentration had no significant effect on the Datura seed germination, while that of high concentration showed an inhibitory effect on the seed germination. Under drought stress, with the increasing concentration of exogenous calcium, the three indicators of Datura seeds showed a trend of increasing first and then decreasing. When the exogenous calcium had the concentration of 20 mmol/L, all the indicators of seed germination reached the maximum value, while showed a downward trend when exogenous calcium concentration was 25-30 mmol/L, and even increasingly sharp with drought intensifying. Therefore, in the production and utilization of Datura, 20 mmol/L of exogenous calcium can be used to soak seeds before sowing to improve the emergence rate under low and moderate drought conditions.

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Poor seed quality, reduced germination, and decreased seedling vigor in soybean is linked to exposure of the maternal lines to drought stress

10.1101/590059 ◽

2019 ◽

Author(s):

Chathurika Wijewardana ◽

K. Raja Reddy ◽

L. Jason Krutz ◽

Wei Gao ◽

Nacer Bellaloui

Keyword(s):

Soil Moisture ◽

Drought Stress ◽

Seed Germination ◽

Seed Quality ◽

Germination Rate ◽

Moisture Stress ◽

Seedling Vigor ◽

Soil Moisture Stress ◽

Effects Of Drought ◽

F1 Generation

AbstractEffects of environmental stressors on the parent may be transmitted to the F1 generation of plants that support global food, oil, and energy production for humans and animals. This study was conducted to determine if the effects of drought stress on parental soybean plants are transmitted to the F1 generation. The germination and seedling vigor of F1 soybean whose maternal parents, Asgrow AG5332 and Progeny P5333RY, were exposed to soil moisture stress, that is, 100, 80, 60, 40, and 20% replacement of evapotranspiration (ET) during reproductive growth, were evaluated under controlled conditions. Pooled over cultivars, effects of soil moisture stress on the parents caused a reduction in the seed germination rate, maximum seed germination, and overall seedling performance in the F1 generation. The effect of soil moisture stress on the parent induced an irreversible change in the seed quality in the F1 generation and the effects on seed quality in the F1 generation were exasperated when exposed to increasing levels of drought stress. Results indicate that seed weight and storage reserve are key factors influencing germination traits and seedling growth. Our data confirm that the effects of drought stress on soybean are transferable, causing reduced germination, seedling vigor, and seed quality in the F1 generation.

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Effects of Drought Stress Simulated by Polyethylene Glycol on Seed Germination, Root and Seedling Growth, and Seedling Antioxidant Characteristics in Job’s Tears

Agricultural Sciences ◽

10.4236/as.2018.98069 ◽

2018 ◽

Vol 09 (08) ◽

pp. 991-1006 ◽

Cited By ~ 1

Author(s):

Can Wang ◽

Lingbo Zhou ◽

Guobing Zhang ◽

Yan Xu ◽

Xu Gao ◽

...

Keyword(s):

Polyethylene Glycol ◽

Drought Stress ◽

Seed Germination ◽

Seedling Growth ◽

Job’S Tears ◽

Effects Of Drought ◽

Antioxidant Characteristics

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Drought Stresses on Seed Germination and Early Growth of Maize and Sorghum

Journal of Agricultural Science ◽

10.5539/jas.v11n2p310 ◽

2019 ◽

Vol 11 (2) ◽

pp. 310 ◽

Cited By ~ 3

Author(s):

Mariana S. Queiroz ◽

Carlos E. S. Oliveira ◽

Fábio Steiner ◽

Alan M. Zuffo ◽

Tiago Zoz ◽

...

Keyword(s):

Drought Stress ◽

Seed Germination ◽

Osmotic Potential ◽

Germination Rate ◽

Early Growth ◽

Root Shoot Ratio ◽

Randomized Design ◽

Root And Shoot Length ◽

Early Seedling ◽

Effects Of Drought

Seeds of maize (Zea mays L.) and sorghum [Sorghum bicolor (L.) Moench.] were submitted to different osmotic potential levels induced by polyethylene glycol (PEG) with the objective of evaluating the effects of drought stress on seed germination and early seedling growth. Seeds were arranged in paper rolls and soaked in PEG solutions prepared with osmotic potentials 0.0 (control), -0.2, -0.4, and -0.8 MPa and kept into a seed germinator, at 25 °C for 18 days. A completely randomized design in a 2 × 4 factorial scheme with four replications of 50 seeds each was used. The results showed that by increasing of the osmotic potential level, germinated seed number, germination rate index, root and shoot length, shoot and root dry matter, and seedling vigor index (SVI) decreased, while mean germination time (MGT) and root: shoot ratio (RSR) increased in both crops. Additionally, the maize was more susceptible than sorghum to drought stress, with germination response declining more rapidly with decreasing osmotic potential. Sorghum crop tolerates water stress of up to -0.2 MPa, without reducing germination of the seeds; however, the growth of shoots and roots are inhibited. Drought stress limits the process of seed germination and early growth of maize seedlings.

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