Seed priming improves the germination performance of cumin (Cuminum syminum L.) under temperature and water stress

The present study was conducted to investigate the effects of Cuscuta reflexa extract (CRE) on the activities of germination enzymes, seed germination vigor, biomass production, physio-biochemical attributes, and seed yield of water-stressed wheat plants. Different levels of CRE (0, 10, 20, 30, 40, and 50%), including water soaking, were used as seed priming. Water stress negatively affected the seed germination, germination enzyme activities, growth, yield, and different physio-biochemical attributes of wheat plants. Low doses of CRE (10, 20, and 30%) ameliorated the adverse effects of water stress on seed germination attributes, and activities of germination enzymes, but negative impacts were recorded at higher doses (40 and 50%) of CRE. Water-stressed wheat plants grown from seeds pre-treated with low doses of CRE also showed better growth and yield as compared with non-treated ones, and that was associated with an improvement in water relations, photosynthetic pigments, nutrient acquisition, reduced lipid peroxidation, and better antioxidative defense mechanisms. The maximum increase in seed yield was 14.77 and 12.32%, found in plants grown from seeds treated with 20% and 10% CRE, respectively. In conclusion, it is suggested that using low doses of CRE as seed priming can contribute to better wheat yield under water stress, especially in semi-arid and arid areas.

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SEED PRIMING WITH GLYCINE BETAINE IMPROVE SEED GERMINATION CHARACTERISTICS AND ANTIOXIDANT CAPACITY OF WHEAT (TRITICUM AESTIVUM L.) SEEDLINGS UNDER WATER-STRESS CONDITIONS

Applied Ecology and Environmental Research ◽

10.15666/aeer/1704_83338350 ◽

2019 ◽

Vol 17 (4) ◽

Cited By ~ 3

Author(s):

N AHMED

Keyword(s):

Triticum Aestivum ◽

Water Stress ◽

Seed Germination ◽

Antioxidant Capacity ◽

Glycine Betaine ◽

Seed Priming ◽

Triticum Aestivum L ◽

Stress Conditions ◽

Germination Characteristics ◽

Improve Seed Germination

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Application of the hydrotime model to assess seed priming effects on the germination of rapeseed (Brassica napus L.) in response to water stress

Botany ◽

10.1139/cjb-2019-0192 ◽

2020 ◽

Vol 98 (5) ◽

pp. 283-291

Author(s):

Samaneh Tatari ◽

Farshid Ghaderi-Far ◽

Ahad Yamchi ◽

Asieh Siahmarguee ◽

Ali Shayanfar ◽

...

Keyword(s):

Water Stress ◽

Germination Rate ◽

Seed Priming ◽

Germination Percentage ◽

The Other ◽

Dormancy Breaking ◽

Brassica Napus L ◽

Hydrotime Model ◽

Response To Water ◽

Base Water Potential

Our aim was to determine whether the parameters of the hydrotime model can be used to compare the effects of seed priming treatments on germination. Seeds of three rapeseed cultivars (‘H61’, ‘H4815’, and ‘DK003’) were exposed to priming treatments and then their germination was tested at different water potentials. Seed priming improved the germination percentage, which was higher in ‘H4815’ than in the other two cultivars, and it increased germination rate (decreased θH) and uniformity (decreased σψb). The increase in germination rate was higher in PEG-osmoprimed than in NaCl-osmoprimed and hydroprimed seeds. The base water potential allowing 50% germination ([Formula: see text]) also was affected by seed priming, but the response of cultivars to different priming treatments varied. Compared with the control seeds, hydropriming of ‘H61’ seeds shifted ψb(50) toward negative values, whereas NaCl-osmopriming of ‘H4815’ seeds shifted ψb(50) toward negative values. On the other hand, priming of ‘DK003’ seeds shifted ψb(50) to more positive values and increased susceptibility to water stress. After dormancy-breaking and dormancy-induction treatments, ψb(50) shifted to more negative or positive values, indicating the release of primary dormancy and induction of dormancy, respectively. Therefore, priming treatments should be selected, depending on the environmental conditions anticipated to prevail during the germination of rapeseed seeds.

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Seed Priming with Salicylic Acid Improves Germination and Seedling Growth of Rice (Oryza sativa L.) under PEG-6000 Induced Water Stress

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2018.710.101 ◽

2018 ◽

Vol 7 (10) ◽

pp. 907-924 ◽

Cited By ~ 6

Author(s):

Prabhasmita Shatpathy ◽

Manoranjan Kar ◽

Sanat Kumar Dwibedi ◽

Abhiram Dash

Keyword(s):

Salicylic Acid ◽

Oryza Sativa ◽

Water Stress ◽

Seedling Growth ◽

Oryza Sativa L ◽

Seed Priming ◽

Peg 6000

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Mechanism of Action of C2H4 in Promoting the Germination of Cocklebur Seeds. III. A Further Enhancement of Priming Effect With Nitrogenous Compounds and C2H4 Responsiveness of Seeds

Functional Plant Biology ◽

10.1071/pp9960519 ◽

1996 ◽

Vol 23 (4) ◽

pp. 519 ◽

Cited By ~ 4

Author(s):

M Yoshiyama ◽

A Maruyama ◽

T Atsumi ◽

Y Esashi

Keyword(s):

Water Stress ◽

Priming Effect ◽

Seed Priming ◽

The Other ◽

Cyanogenic Glycosides ◽

High Concentration ◽

Barnyard Grass ◽

Nitrogenous Compounds ◽

Contrary Effect

Efficiency of organic or inorganic osmotica for seed priming of cocklebur (Xanthium pennsylvanicum Wallr.) revealed that KNO3 was the most promising, and was more effective than mannitol or other salts at the same concentration (200 mM) and was independent of the C2H4 action. However, KNO3 applied as a priming reagent enhanced the effect of C2H4 or that of the water stress imposed with mannitol. Unlike the action of mannitol, both KNO3M and C2H4 augmented the pool size of amino acids in seed cells. However, below 50 mM KNO3 imposing no stress only slightly, though insignificantly, affected the germinability as well as the levels of total cyanogen. On the other hand, at a high concentration which imposed water stress on the seeds, 200 mM KNO3 remarkably elevated the contents of both cyanogenic glycosides and lipids in the excised cotyledons. When C2H4 was added with KNO3, the level of cyanogenic compounds significantly increased but when added without KNO3, the contrary effect was shown. Hence the enhancement of the mannitol-induced priming effect by nitrogenous reagents in cocklebur seeds could be implicated in the accumulation of cyanogenic compounds. Unlike cocklebur, both common chickweed and barnyard grass seeds are very responsive to 30 mM KNO3 on germination, and such species abundantly contain cyanogen. The amount of cyanogen was further augmented by contact with KNO3 at only 30 mM. The role of NO-3 -dependent cyanogenesis is highlighted in relation to germination response of seeds.

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