scholarly journals Ascorbic Acid Priming Enhances Seed Germination and Seedling Growth of Winter Wheat under Low Temperature Due to Late Sowing in Pakistan

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 757 ◽  
Author(s):  
Tariq Shah ◽  
Sadia Latif ◽  
Hamad Khan ◽  
Fazal Munsif ◽  
Lixiao Nie
Keyword(s):  
Ascorbic Acid ◽  
Seed Germination ◽  
Low Temperature ◽  
Winter Wheat ◽  
Block Design ◽  
Seed Priming ◽  
Limiting Factor ◽  
Antioxidant Enzyme Activities ◽  
Chlorophyll Contents ◽  
Late Sowing

Poor seed germination is a crucial yield-limiting factor when winter wheat is sown under low temperature. The objective of this study was to evaluate the role of ascorbic acid (AsA) in the extenuation of the harmful effects of low temperature at early and reproductive stages of wheat during 2016–2017 (15 November to 15 December). A two-year experiment was conducted using a randomized complete block design with split plot arrangement and with three replicates. Sowing dates (15 November and 15 December) were allotted to the main plot while seed priming (control, hydro-priming, and AsA priming) were allotted to the sub-plot. Results demonstrated that AsA priming significantly boosted different yield characteristics including chlorophyll content, tillers per unit area, number of grains per spike, and 1000-grain weight, contributing higher productivity and biomass during 2016–2017. The results further revealed that AsA could induce the up-regulation of diverse antioxidants (super oxide dismutase (SOD), peroxidase (POD), and catalase (CAT)), thus offsetting the adverse effects of sub-supra optimum temperatures of late sowing wheat. It is therefore concluded in this work that AsA priming enhances stand establishment, yield and yield-related traits, antioxidant enzyme activities, and chlorophyll contents when wheat is sown under low temperature.

scholarly journals Effects of exogenous silicon on maize seed germination and seedling growth

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yankun Sun ◽  
Jiaqi Xu ◽  
Xiangyang Miao ◽  
Xuesong Lin ◽  
Wanzhen Liu ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Crop Yields ◽  
Dry Weight ◽  
Membrane System ◽  
Water Soluble ◽  
Current Status ◽  
Antioxidant Enzyme Activities ◽  
Chlorophyll Contents ◽  
Antioxidant Defence System

AbstractAs the global population continues to increase, global food production needs to double by 2050 to meet the demand. Given the current status of the not expansion of cultivated land area, agronomic seedlings are complete, well-formed and strong, which is the basis of high crop yields. The aim of this experiment was to study the effects of seed germination and seedling growth in response to silicon (from water-soluble Si fertilizer). The effects of Si on the maize germination, seedling growth, chlorophyll contents, osmoprotectant contents, antioxidant enzyme activities, non-enzymatic antioxidant contents and stomatal characteristics were studied by soaking Xianyu 335 in solutions of different concentrations of Si (0, 5, 10, 15, 20, and 25 g·L−1). In this study, Si treatments significantly increased the seed germination and per-plant dry weight of seedlings (P < 0.05), and the optimal concentration was 15 g·L−1. As a result of the Si treatment of the seeds, the chlorophyll content, osmotic material accumulation and antioxidant defence system activity increased, reducing membrane system damage, reactive oxygen species contents, and stomatal aperture. The results suggested that 15 g·L−1 Si significantly stimulated seed germination and promoted the growth of maize seedlings, laying a solid foundation for subsequent maize growth.

Appraisal of nitric oxide priming to improve the physiology of bread wheat

2020 ◽  
Vol 158 (1-2) ◽  
pp. 99-106 ◽  
Author(s):  
Asia Bibi ◽  
Sadia Qureshi ◽  
Iram Shehzadi ◽  
Muhammad Shoaib Amjad ◽  
Nosheen Azhar ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Block Design ◽  
Seed Priming ◽  
Germination Percentage ◽  
No Donor ◽  
Wheat Varieties ◽  
Chlorophyll Contents ◽  
Relative Water ◽  
Biological Yield ◽  
Physiological Variations

AbstractSeed priming is a pre-sown treatment and it is often used to improve the performance of plants in any environment, especially germination. In the current study, various concentrations of nitric oxide (NO) were used to evaluate its role for the induction of physiological variations within seven different wheat (Triticum aestivum L.) genotypes. Two experiments were conducted during 2013 and 2014 and the data were statistically analysed for significance. All these genotypes after treatment with sodium nitroprusside (SNP) as NO donor at 10−4 and 10−5 M concentrations were sown following randomized complete block design with triplicates in the fields of District Muzaffarabad, Pakistan. The concentration of NO at 10−4 M showed promising results and most of the studied characters were found improved compared to control. Wheat varieties primed with 10−4 M SNP showed highest germination speed and germination percentage. NARC-2011 and Uqab-2002 showed much improvement in physiological attributes at both concentrations of NO priming. However, Uqab-2002 and Punjab-2011 showed a significant increase in chlorophyll contents and leaf moisture content with 10−4 and 10−5 M SNP priming compared to control. Highest relative water content was observed within unprimed Lasani, whereas the relative injury was found to be decreased at 10−4 M SNP primed Faisalabad-2008. Wheat varieties Punjab-2011 and Faisalabad-2008 showed the highest increase in grain yield and biological yield by 10−4 M SNP. Hence, it is concluded that sowing of crops after priming at 10−4 M NO concentration can improve the germination, biochemistry and physiology that ultimately lead to an increase in crop yield.

scholarly journals Seed Priming with Melatonin Improves the Seed Germination of Waxy Maize under Chilling Stress via Promoting the Antioxidant System and Starch Metabolism

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Qingjun Cao ◽  
Gang Li ◽  
Zhengguo Cui ◽  
Fentuan Yang ◽  
Xiaoli Jiang ◽  
...  
Keyword(s):  
Seed Germination ◽  
Antioxidant System ◽  
Germination Rate ◽  
Chilling Stress ◽  
Seed Priming ◽  
Seed Vigor ◽  
Antioxidant Enzyme Activities ◽  
Starch Metabolism ◽  
Waxy Maize ◽  
Significant Difference

Abstract Chilling stress is one of the major abiotic stresses affecting waxy maize plant growth. Melatonin (MT) is able to improve tolerance to abiotic stress in plants. To investigate the effects of seed priming with MT on tolerance to chilling stress in waxy maize, the seed germination characteristics and physiological parameters were tested with varied MT concentrations (0, 50, 100 µM) and treatment times (12, 24 h) at ambient (25 °C) and chilling (13 °C) temperature. MT primed seeds significantly enhanced the germination potential (by 20.29% and 50.71%, respectively), germination rate (by 20.88% and 33.72%), and increased the radicle length (by 90.73% and 217.14%), hypocotyl length (by 60.28% and 136.14%), root length (by 74.59% and 108.70%), and seed vigor index (46.13%, 63.81%), compared with the non-priming seeds under chilling stress. No significant difference was found in priming time between primed and non-primed seeds. In addition, lower H2O2 and malondialdehyde concentrations, increased antioxidant enzyme activities (superoxide dismutase, peroxidase, catalase and ascorbateperoxidase), and promoted starch metabolism were found in primed seeds compared to non-primed ones. It was suggested that seed priming with MT improved waxy maize seed germination under chilling stress through improving antioxidant system and starch metabolism, which protected from oxidative damage.

AN ATTEMPT TO IMPROVE SWEET CORN SEED GERMINATION UNDER LOW TEMPERATURE CONDITIONS BY USING SEED PRIMING

2010 ◽  
Vol 1 (2) ◽  
pp. 171-181 ◽  
Author(s):  
S. El-Saifi ◽  
H. Ahmed ◽  
M. Morsi ◽  
Sawsan Hasan ◽  
Rowaa El-Shatoury
Keyword(s):  
Seed Germination ◽  
Low Temperature ◽  
Sweet Corn ◽  
Seed Priming ◽  
Corn Seed ◽  
Temperature Conditions

scholarly journals Seed Priming Improves Seed Germination and Seedling Growth of Isatis indigotica Fort. under Salt Stress

HortScience ◽  
2020 ◽  
Vol 55 (5) ◽  
pp. 647-650
Author(s):  
Xu-Wen Jiang ◽  
Cheng-Ran Zhang ◽  
Wei-Hua Wang ◽  
Guang-Hai Xu ◽  
Hai-Yan Zhang
Keyword(s):  
Salt Stress ◽  
Seed Germination ◽  
Seedling Growth ◽  
Growth Parameters ◽  
Seed Priming ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Antioxidant Enzyme Activities ◽  
Isatis Indigotica ◽  
Germination Characteristics

The effects of CaCl2, GA3, and H2O2 priming on Isatis indigotica Fort. seed germination characteristics, seedling growth parameters, and antioxidant enzyme activities under salt stress were investigated. NaCl had an adverse effect on the germination and seedling performance of I. indigotica. However, these three priming agents alleviated salt stress by increasing the germination percentage, improving seed vigor, accelerating germination velocity, and establishing strong seedlings. The optimal concentrations were 15 g/L for CaCl2, 0.2 g/L for GA3, and 40 mm for H2O2. Seed priming treatments enhanced the activities of antioxidant enzymes in seedlings, such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), under a salt environment, which reduced the oxidative injury caused by salt. Seed priming is a promising technique that can enhance the ability of I. indigotica seed germination when salt is present.

scholarly journals INVESTIGATING THE EFFECT OF COLD TEMPERATURE STRESS ON UNOPENED MALE CATKINS AND INOCULATED FEMALE FLOWERS OF IRANIAN NATIVE HAZELNUT CULTIVARS

2020 ◽  
Vol 28 (29) ◽  
pp. 17-27
Author(s):  
Saeed BAHRAMI
Keyword(s):  
Low Temperature ◽  
Temperature Stress ◽  
Block Design ◽  
Reproductive Organs ◽  
Proline Content ◽  
Limiting Factor ◽  
H2o2 Content ◽  
Production And Distribution ◽  
Horticultural Plants ◽  
Female Flowers

In many low-temperature areas, the environmental factor is an important limiting factor for the production and distribution of horticultural plants. This study aimed to investigate the cold tolerance of the male catkins and inoculated female flowers to screen the popular native hazelnut cultivars in Qazvin under low-temperature stress. A completely randomized factorial block design with three replications was used in this experiment with eight cultivars (Nakhnroud, Khandan, Mish-Pestan, South of Qarabagh, Asl-e-Qarabagh, Rasmi, and Gerdashkevar). After removing each of the treated samples at the end of the experiment, the samples were examined morphologically (appearance) and compared with the control. The changes were recorded as qualitative traits. To understand the influence of cold stress on reproductive organs, hydrogen peroxide and proline were measured. The results showed the onset of freezing in unopened male catkins at -7 and -9 °C and in inoculated female flowers at -3 °C. Damage to unopened male catkins' tissue occurred at -11 °C and in female flowers at -5 °C. The highest value observed among cultivars in the case for proline content of male catkins was in Mish-Pestan and Khandan cultivars with 0.816 and 0.660 µmol/ g FW, respectively. In inoculated female flowers, Mish-Pestan and Tabestaneh cultivars with 0.185 and 0.168 µmol/ g FW, respectively, showed the highest statistically significant increase in proline content. Interestingly, the cultivars with the highest proline content in male catkins indicated the most increase in H2O2; Mish-Pestan and Khnadan with 0.569 and 0.541 ug/g FW, respectively. Asl-eQarabagh was observed to have the least H2O2 content (0.042 ug/g FW) among cultivars. Again, in inoculated female flowers, those with the highest concentration of proline (Mish-Pestan and Tabestaneh) were found to have the highest H2O2 content (0.335 and 0.331 ug/g FW, respectively

scholarly journals Determining Critical Soil pH for Sunflower Production

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Apurba Sutradhar ◽  
Romulo P. Lollato ◽  
Katy Butchee ◽  
Daryl B. Arnall
Keyword(s):  
Winter Wheat ◽  
Great Plains ◽  
Soil Ph ◽  
Soil Acidity ◽  
Cropping Systems ◽  
Block Design ◽  
Hydrated Lime ◽  
Aluminum Concentration ◽  
Limiting Factor ◽  
Rotational Crop

Soil acidity has become a major yield-limiting factor in cropping systems of the Southern Great Plains, in which winter wheat (Triticum aestivumL.) is the predominant crop. Sunflower (Helianthus annuusL.) is a strong rotational crop with winter wheat due to its draught and heat tolerance. However, the effects of low soil pH on sunflower productivity have not been explored. The objective of this study was to determine the critical soil pH and aluminum concentration (AlKCl) for sunflower. Sunflower was grown in a randomized complete block design with three replications of a pH gradient ranging from 4.0 to 7.0 at three locations with varying soil types. Soil pH was altered using aluminum sulfate (Al2(SO4)3) and hydrated lime (Ca(OH)2). Plant height, vigor, and survivability were all negatively affected by soil acidity. Sunflower yield was reduced by 10% at or below soil pH 4.7 to 5.3 dependent upon location and soil type. Levels ofAlKClabove 6.35 mg kg−1reduced seed yield by 10% or greater. We concluded that sunflower may serve as a better rotational crop with winter wheat under acidic conditions when compared to other adaptable crops.

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