Effect of ethanol, methanol, zinc, manganese and boron seed priming on ageing, seed germination and physiological characteristics in canola under water deficit stress

2014 ◽  
Vol 15 (1) ◽  
pp. 116
Author(s):  
E. Khalilvand Behrouzyar ◽  
M. Yarnia
Keyword(s):  
Seed Germination ◽  
Water Deficit ◽  
Seed Priming ◽  
Physiological Characteristics ◽  
Water Deficit Stress

scholarly journals Myxospermous seed-mucilage quantity correlates with environmental gradients indicative of water-deficit stress: Plantago species as a model

2019 ◽  
Vol 446 (1-2) ◽  
pp. 343-356 ◽  
Author(s):  
António Teixeira ◽  
Pietro Iannetta ◽  
Kirsty Binnie ◽  
Tracy A. Valentine ◽  
Peter Toorop
Keyword(s):  
Seed Germination ◽  
Water Deficit ◽  
Stress Responses ◽  
Environmental Gradients ◽  
Seedling Survival ◽  
Water Deficit Stress ◽  
Arid Environments ◽  
Seedling Mortality ◽  
The Relationship ◽  
Seed Mucilage

Abstract Aims Myxospermous seed mucilage is multifunctional and is often found in seeds (or achenes) of species occupying arid environments where the trait may influence seed-dispersal and -germination of seeds. The seed mucilage may also enhance soil-water retention, −hydraulic conductivity and -stability. However, the relationship between seed mucilage quantity, seed germination and seedling traits across environmental gradients which determine water-deficit stress has not yet been ascertained. Methods Therefore, we characterised and tested the relationship between seed mucilage quantity, water-deficit stress responses of seeds and seedlings of 36 accessions of four different Plantago species (P. albicans L., P. coronopus L., P. lagopus L. and P. anceolata L.). These were gathered from six regions across Europe, which presented environmental gradients (of rainfall and temperature), and varying soil qualities. Results Seed mucilage was significantly greater in seeds of accessions experiencing: highest summer temperatures; lowest summer precipitation; soils of the same warm dry regions which had greater capacity to retain water within narrow pore spaces. Under water-deficit stress, seeds with most mucilage exhibited a lower base water potential for germination, suffered least seedling mortality and exhibited the most successful seedling development. Conclusions The findings indicate that seed mucilage quantity appeared as an ‘adaptive’ trait and there is a relationship between seed-mucilage quantity, seed germination plus seedling survival and development under environmental conditions of highest water-deficit stress.

scholarly journals Silicon-Mediated Priming Induces Acclimation to Mild Water-Deficit Stress by Altering Physio-Biochemical Attributes in Wheat Plants

2021 ◽  
Vol 12 ◽  
Author(s):  
Arruje Hameed ◽  
Tahir Farooq ◽  
Amjad Hameed ◽  
Munir Ahmad Sheikh
Keyword(s):  
Water Deficit ◽  
Plant Biomass ◽  
Hydrolytic Enzymes ◽  
Seed Priming ◽  
Water Deficit Stress ◽  
Flag Leaves ◽  
Cell Membrane Stability ◽  
Metabolic Functions ◽  
Stress Acclimation ◽  
Mediated Priming

Water-deficit stress negatively affects seed germination, seedling development, and plant growth by disrupting cellular and metabolic functions, reducing the productivity and yield of field crops. In this study, sodium silicate (SS) has been employed as a seed priming agent for acclimation to mild water-deficit stress by invoking priming memory in wheat plants. In pot experiments, the SS-primed (20, 40, and 60 mM) and non-primed control seeds were allowed to grow under normal and mild water-deficit conditions. Subsequently, known methods were followed for physiological and biochemical studies using flag leaves of 98-day mature wheat plants. The antioxidant and hydrolytic enzymes were upregulated, while proteins, reducing sugars, total sugars, and glycine betaine increased significantly in the flag leaves of wheat plants originated from SS-treated seeds compared to the control under mild water-deficit stress. Significant decreases in the malondialdehyde (MDA) and proline contents suggested a controlled production of reactive oxygen species, which resulted in enhanced cell membrane stability. The SS priming induced a significant enhancement in yield, plant biomass, and 100-grain weight of wheat plants under water-deficit stress. The improvement in the yield parameters indicated the induction of Si-mediated stress acclimation in SS-primed seeds that elicited water-deficit tolerance until the maturity of plants, ensuring sustainable productivity of climate-smart plants.

scholarly journals Physiological response of sweet corn (Zea mays var. merit) to foliar application of salicylic acid under water deficit stress

2018 ◽  
Vol 44 (4) ◽  
pp. 659-663 ◽  
Author(s):  
Ebrahim Khalilvand Behrouzyar ◽  
Mehrdad Yarnia
Keyword(s):  
Zea Mays ◽  
Salicylic Acid ◽  
Water Deficit ◽  
Sweet Corn ◽  
Seed Priming ◽  
Grain Weight ◽  
Water Deficit Stress ◽  
Mild Stress ◽  
Chl A ◽  
And Control

The effect of water deficit stress and salicylic acid application on physiological characteristics of sweet corn (Zea mays var. Merit), an experiment was conducted. Treatments were water deficit stress in three levels: a1: normal irrigation (100% FC irrigation), a2: fair stress (75% FC irrigation) and a3: mild stress (50% FC irrigation). The second factor was the 0/1 mM salicylic acid application in six levels [b1: control, b2: seed priming, b3: SA application in 3 leaves stage, b4: SA application in pollination stage, b5: seed priming + SA application in pollination stage and b6: SA application at 3 leaves stage + pollination stage. The analysis of variance showed significant effect of interaction between water deficit stress and SA application on Chl. a, Chl. b, Chl. a + b, 100-grain weight and ear yield (p < 0.01). Results showed that SA application at 3-leaves stage + pollination stage indicated five times more Chl.a as compared with control in 50% FC irrigation. SA application at 3-leaves stage proved 4/2 and 4/4 times more Chl.b and Chl. a + b as compared to control in mild stress. SA application at pollination stage had the highest (36/15 g) and control at mild stress had the lowest (10/56 g) 100-grain weight. Also, SA application at 3-leaves stage + pollination stage had the highest (245/1 g/plant) and control at mild stress had the lowest (74/25 g/plant) ear yield.

Ascorbic acid alleviates water deficit induced growth inhibition in wheat seedlings by modulating levels of endogenous antioxidants

Biologia ◽  
2016 ◽  
Vol 71 (4) ◽  
Author(s):  
Navdeep Singh ◽  
Rachana D. Bhardwaj
Keyword(s):  
Ascorbic Acid ◽  
Water Deficit ◽  
Seed Priming ◽  
Antioxidant Response ◽  
Shoot Length ◽  
Water Deficit Stress ◽  
Wheat Cultivars ◽  
Wheat Seedlings ◽  
Drought Tolerant ◽  
Endogenous Antioxidants

AbstractThe present investigation envisaged the potential of ascorbic acid through seed priming on the seedling growth and antioxidant response in three wheat cultivars i.e., PBW 644 (Drought tolerant), PBW 621 and HD 2967 (Drought sensitive) grown under water deficit stress. Imposition of water deficit stress reduced the root and shoot lengths by more than 11% in PBW 644, 18% in PBW 621 and 9% in HD 2967. On exposure to water deficit stress, catalase (CAT) was upregulated in the roots of all the three cultivars but declined in the shoots. Ascorbate peroxidase (APX) activity increased in stressed plants of tolerant cultivar but declined in sensitive cultivars except the shoots of HD 2967. Under water deficit stress, seed priming with 400 μM of ascorbic acid increased shoot length of all the three cultivars by more than 19% when compared to stressed seedlings. Further, it enhanced the drought tolerance of PBW 644 by upregulating superoxide dismutase (SOD), CAT, APX and glutathione reductase (GR) enzymes accompanied by an increase in glycine betaine and H

scholarly journals Seed Treatment with α-Tocopherol Regulates Growth and Key Physio-Biochemical Attributes in Carrot (Daucus carota L.) Plants under Water Limited Regimes

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 469 ◽  
Author(s):  
Abdul Hameed ◽  
Nudrat Aisha Akram ◽  
Muhammad Hamzah Saleem ◽  
Muhammad Ashraf ◽  
Shakeel Ahmed ◽  
...  
Keyword(s):  
Water Deficit ◽  
Seed Treatment ◽  
Total Phenolics ◽  
Field Capacity ◽  
Seed Priming ◽  
Alpha Tocopherol ◽  
Water Deficit Stress ◽  
Defense System ◽  
Daucus Carota L ◽  
Growth Attributes

The influence of seed priming with varying levels (50 and 100 mg L−1) of alpha-tocopherol (Toc) was investigated in carrot plants under water-deficit conditions. For this purpose, two cultivars of carrot, DC4 and DC90, were selected and subjected to well-watered (100% field capacity (FC)) and water-deficit stress (50% FC). After 21 days of water-deficit conditions, a significant suppression was observed in shoot and root fresh and dry weights, their lengths, chlorophyll a, b and total contents, and total soluble proteins (TSP). However, an up-regulatory effect of water stress was observed on the concentrations of glycinebetaine (GB), hydrogen peroxide (H2O2), malondialdehyde (MDA), ascorbic acid (AsA), total phenolics as well as the activities of catalase (CAT) and peroxidase (POD) enzymes. Exogenous application of alpha-tocopherol was effective in reducing the accumulation of H2O2 and MDA contents and improving all growth attributes, contents of chlorophyll, proline, GB, AsA, total phenolics, TSP, and the activities of CAT and POD enzymes. Of both carrot cultivars, cv. DC4 had better performance in terms of growth attributes, whereas the response of the two cultivars was similar in all other attributes varying water regimes. Overall, it is suggested that seed priming with 100 mg L−1 Toc was effective in improving plant growth attributes, osmoprotectants and the oxidative defense system of carrot plants under water-deficit conditions.

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