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Gibberellic acid interacts with salt stress on germination, growth and polyamine gene expression in fennel (Foeniculum vulgare Mill.) seedlings

This study aimed to rigorously investigate and integrate the underlying hypothesis that an enhancing effect of gibberellic acid (GA 3 , 3 µM) with increased growth actually leads to a modification of the physiological role of polyamines during salinity stress (NaCl, 100 mM) in fennel. These analyses...

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Published in:Physiology and molecular biology of plants 2022-03, Vol.28 (3), p.607-622
Main Authors: Attia, Houneida, Alamer, Khalid, Algethami, Badreyah, Zorrig, Walid, Hessini, Kamel, Gupta, Kamala, Gupta, Bhaskar
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container_title Physiology and molecular biology of plants
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creator Attia, Houneida
Alamer, Khalid
Algethami, Badreyah
Zorrig, Walid
Hessini, Kamel
Gupta, Kamala
Gupta, Bhaskar
description This study aimed to rigorously investigate and integrate the underlying hypothesis that an enhancing effect of gibberellic acid (GA 3 , 3 µM) with increased growth actually leads to a modification of the physiological role of polyamines during salinity stress (NaCl, 100 mM) in fennel. These analyses concern both reserve tissues (cotyledons) and embryonic axes in growth. Physiological results indicate a restriction of germination, growth, mineral nutrition and damages to membranes of salt-treated seedlings. This was partially attenuated in seedlings treated with an interaction effect of GA 3 and NaCl. Peroxidase and catalase activities showed a reduction or an augmentation according to the treatments and organs. The three main polyamines (PA): putrescine, spermidine and spermine were elevated in the salt-treated seedlings. Meanwhile, GA 3 seed priming was extremely efficient in reducing PA levels in salt-stressed seedlings compared to the control. Response of PA genes to salinity was variable. Up-regulation was noted for SPMS1 , ODC1 , and ADC1 in hypocotyls and cotyledons (H + C) and down-regulation for SAMDC1 in the radicle. Interaction of salt/GA 3 treatment showed different responses, only ODC1 in (H + C) and ADC1 in both radicle and (H + C) were overexpressed. Concerning other genes, no change in mRNA abundance was observed in both organs compared to the salt-treated seedlings. From these results, it could be inferred that the fennel seedlings were NaCl sensitive. This sensitivity was mitigated when GA3 applied for seed priming and applied in combination with NaCl, which resulted in a reduction of the PA content.
doi_str_mv 10.1007/s12298-022-01140-4
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Concerning other genes, no change in mRNA abundance was observed in both organs compared to the salt-treated seedlings. From these results, it could be inferred that the fennel seedlings were NaCl sensitive. This sensitivity was mitigated when GA3 applied for seed priming and applied in combination with NaCl, which resulted in a reduction of the PA content.</abstract><cop>New Delhi</cop><pub>Springer India</pub><pmid>35465200</pmid><doi>10.1007/s12298-022-01140-4</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record>
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ispartof Physiology and molecular biology of plants, 2022-03, Vol.28 (3), p.607-622
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source PubMed (Medline); Springer Nature
subjects Biological and Medical Physics
Biomedical and Life Sciences
Biophysics
Catalase
Cell Biology
Cotyledons
Embryos
Foeniculum
Gene expression
Genes
Germination
Gibberellic acid
Hypocotyls
Life Sciences
Nutrition
Organs
Peroxidase
Physiology
Plant Physiology
Plant Sciences
Polyamines
Priming
Putrescine
Reduction
Research Article
Salinity
Salinity effects
Salt
Salts
Seedlings
Sodium chloride
Spermidine
Spermine
title Gibberellic acid interacts with salt stress on germination, growth and polyamine gene expression in fennel (Foeniculum vulgare Mill.) seedlings
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