Journal ArticleDOI
Chemical priming with urea and KNO3 enhances maize hybrids (Zea mays L.) seed viability under abiotic stress
TLDR
Generally, KNO3 and urea alleviated effects of both stresses and led to increased germination and seedling growth as well as the root length, and hybrid 304 appeared to be more resistant to stress than other hybrids.Abstract:
Seed priming is a method to improve germination and seedling establishment under stress conditions. The effect of seed priming in chemical solutions such as urea and KNO3, on protein and proline content, germination, and seedling growth responses of four maize (Zea mays L.) hybrids under drought and salt stress conditions was studied in a controlled environment in 2010. Treatments included stress type and intensity at five levels: moderate drought (MD), severe drought (SD), moderate salt (MS), severe salt (SS), and control (C1, without stress), three seed priming types including water (C2, as control), KNO3, and urea (as chemical priming), and four maize hybrids including Maxima, SC704, Zola, and 307. The results showed that the highest germination percentage (Ger %), germination rate (GR), seedling length (SL), radical length (RL), and seedling to radical length ratio (S/R) were achieved in no stress treatments and most proline content in SD treatment. Urea priming led to more Ger%, GR, and SL compared to other primers and treatment under KNO3 priming resulted in higher RL compared to other primers. Chemical priming had no effect on S/R and proline content. Also, in terms of most traits, no difference was found among the four hybrids. Results showed that salt stress could affect GR and RL more than the drought stress. Drought stress affected germination percentage and S/R more than the salt stress. Both stresses decreased all measured parameters, except protein and proline content which were increased remarkably, and more under drought compared to salt stress. Based on proline content, hybrid 304 appeared to be more resistant to stress than other hybrids. Generally, KNO3 and urea alleviated effects of both stresses and led to increased germination and seedling growth as well as the root length. Therefore, priming could be recommended for enhancing maize growth responses under stressful conditions.read more
Citations
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Book ChapterDOI
Seed Priming: New Comprehensive Approaches for an Old Empirical Technique
Stanley Lutts,Paolo Benincasa,Lukasz Wojtyla,Szymon Kubala S,Roberta Pace,Katzarina Lechowska,Muriel Quinet,MalgorzataGarnczarska +7 more
TL;DR: A better understanding of the metabolic events taking place during the priming treatment and the subsequent germination should help to use this simple and cheap technology in a more efficient way.
Journal ArticleDOI
Metabolic Pathways Regulated by Chitosan Contributing to Drought Resistance in White Clover
TL;DR: CTS-induced drought resistance was associated with the accumulation of stress protective metabolites, the enhancement of ascorbate-glutathione and tricarboxylic acid cycle, and increases in the γ-aminobutyric acid shunt, polyamine synthesis, and flavonoids metabolism contributing to improved osmotic adjustment, antioxidant capacity, stress signaling, and energy production for stress defense, thereby maintaining metabolic homeostasis under dehydration stress.
Journal ArticleDOI
Molecular processes induced in primed seeds-increasing the potential to stabilize crop yields under drought conditions.
TL;DR: An overview of the metabolic changes modulated by priming, such as the activation of DNA repair and the antioxidant system, accumulation of aquaporins and late embryogenesis abundant proteins that contribute to enhanced drought stress tolerance are provided.
Book ChapterDOI
Recent Advances in Abiotic Stress Tolerance of Plants Through Chemical Priming: An Overview
Muhammad Arslan Ashraf,Ali Akbar,Sajjad Hassan Askari,Muhammad Iqbal,Rizwan Rasheed,Iqbal Hussain +5 more
TL;DR: This book chapter has discussed a wide range of chemical which are extensively being used for seed priming, which enables plants to survive adverse environmental conditions and gives appropriate yield.
Journal ArticleDOI
GABA/BABA priming: a means for enhancing abiotic stress tolerance potential of plants with less energy investments on defence cache
TL;DR: The better understanding of molecular, physiological, and ecological aspects of GABA/BABA priming might lead to the emergence of this technique as a successful strategy for enhancing the abiotic stress(es) tolerance potential of plants in the field, without compromising much on productivity.
References
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Journal Article
Protein Measurement with the Folin Phenol Reagent
TL;DR: Procedures are described for measuring protein in solution or after precipitation with acids or other agents, and for the determination of as little as 0.2 gamma of protein.
Journal ArticleDOI
A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding
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Journal ArticleDOI
Rapid determination of free proline for water-stress studies
TL;DR: In this article, a simple colorimetric determination of proline in the 0.1 to 36.0 μmoles/g range of fresh weight leaf material was presented.
Journal ArticleDOI
The Osmotic Potential of Polyethylene Glycol 6000
TL;DR: Osmotic potential (psi(s)) of aqueous solutions of polyethylene glycol 6000 (PEG-6000) was curvilinearly related to concentration and increased linearly with temperature.
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