scholarly journals Assessment of exogenous application of plant growth regulators on Cress seed germination and ?-Galactosidase activity

2020 ◽  
Vol 7 (2) ◽  
pp. 257-263
Author(s):  
Ola O. Alghonmeen ◽  
Khalid Y Alsharafa ◽  
Muhamad O. Al-limoun ◽  
Khaled M. Khleifat ◽  
Ezz Al-Dein Muhammed Al-Ramamneh
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Protein Content ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Total Protein ◽  
Total Protein Content ◽  
Galactosidase Activity ◽  
Negative Effect ◽  
Positive Effect

Plant growth regulators (PGRs) were involved in several types of abiotic stress responses by means of improving seed germination and modifying the growth and development of medicinally important Lepidium sativum via alleviating the negative effects of abiotic stresses. Therefore, the present research was carried out to investigate the effects of exogenous application of PGRson seed germination, protein content and ?-galactosidase activity of L. sativum. Germination of L. sativum seeds was monitored for a short interval after the start of incubation until growth became 100%. While cytokinin treatment showed a positive effect on seed germination more than Gibberellic acid (GA), salicylic acid (SA) produced a higher negative effect than auxins. Quantifying changes in total protein content during seed germination as influenced by PGRs revealed that all PGRs have to exert a positive effect arranged in the following order: SA ? auxin ? cytokinin ? GA. Parallel to changes in germination percentage and total protein content of seed, a negative effect was attainedon ?-galactosidase specific activity in response to PGRs with the following arrangement: SA ? auxin ? cytokinin ? GA.In conclusion, the present study proposed the potential importance of the type and magnitude of exogenously applied PGRs during the germination of easily or even more difficult-to-germinate seeds.

Some Effects of Plant Growth-Regulators on Seed Germination and Seedling Development

1946 ◽  
Vol 107 (4) ◽  
pp. 575-583 ◽  
Author(s):  
R. W. Allard ◽  
H. Robert DeRose ◽  
C. P. Swanson
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Seedling Development

scholarly journals Improvement of Seed Germination in Three Medicinal Plant Species by Plant Growth Regulators

HortScience ◽  
2016 ◽  
Vol 51 (7) ◽  
pp. 887-891 ◽  
Author(s):  
Khalid M. Elhindi ◽  
Yaser Hassan Dewir ◽  
Abdul-Wasea Asrar ◽  
Eslam Abdel-Salam ◽  
Ahmed Sharaf El-Din ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Seed Germination ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Germination Rate ◽  
Germination Percentage ◽  
Mentha Piperita ◽  
Naphthalene Acetic Acid ◽  
Sweet Basil

Peppermint (Mentha piperita), sweet basil (Ocimum basilicum), and coriander (Coriandrum sativum) are important medicinal plants in the pharmacological industry. These plants are produced in commercial scale but their seeds exhibit low germination percentages under favorable germination conditions. Enhancing seed germination is thus crucial for improving the production of these plants. The influence of gibberellic acid (GA3), indole-3-acetic acid (IAA), indol-3-butyric acid (IBA), and naphthalene acetic acid (NAA) on seed germination of the three plants were investigated. The seeds were soaked in each plant growth regulator at 50, 100, and 150 mg·L−1 for 24 hours at 25 ± 2 °C. Seed germination was checked daily for 20 days and germination parameters including final germination percentage (FGP), corrected germination rate (CGRI), and number of days lapsed to reach 50% of FGP (GT50) were recorded. The phosphorus and protein contents were determined in germinated seedlings on day 21 of culture. All plant growth regulators enhanced seed germination as compared with control. However, GA3 improved seed germination more than IAA, IBA, and NAA. GA3 at 100 mg·L−1 significantly increased the FGP from 22.3% and 33.3% (control) to 74% and 65.6% for peppermint and sweet basil, respectively. Low concentration of GA3 at 50 mg·L−1 increased the FGP for coriander from 27% to 52.3%. GA3 also increased CGRI, GT50, phosphorus, and protein contents in germinated seedlings as compared with control. Seeds of peppermint, sweet basil, and coriander possess a physiological dormancy that could be elevated by GA3 presowing treatment. This study established a successful methodology for optimizing seed germination to satisfy the demand for the medicinal parts of these plants in the pharmacological industry.

scholarly journals Improving of true shallot seeds germination by the application of plant growth regulators and osmoconditioning treatment

2022 ◽  
Vol 951 (1) ◽  
pp. 012065
Author(s):  
K A Tanjung ◽  
L A M Siregar ◽  
R I M Damanik
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Root Length ◽  
Germination Rate ◽  
Block Design ◽  
Dry Weight ◽  
Peg 6000 ◽  
The Difference

Abstract This study aims to determine the effect of the application of plant growth regulators and osmoconditioning treatment to improve the germination of true shallot seeds. This research was conducted in Asam Kumbang, Medan Selayang, Medan, Indonesia. The research method was a Randomize Block Design with 2 factors, the first factor is Plant Growth Regulators (Z) with 6 levels, namely Z0 (Without PGRs Application), Z1 (Gibberellin 500 ppm), Z2 (Putrescine 15 ppm), Z3 (Putrescine 20 ppm), Z4 (Putrescine 15 ppm + Gibberellin 500 ppm), Z5 (Putrescine 20 ppm + Gibberellin 500 ppm). The second factor was the osmoconditioning treatment with Polyethylene Glycol (PEG) 6000 (O) with 4 levels, namely O0 (Without Osmoconditioning Treatment), O1 (PEG 6000 3%), O2 (PEG 6000 4%), O3 (PEG 6000 5%). Parameters observed were germination rate, germination rate index, percentage of germination, germination ability, simultaneous growth of seeds, seedling length, root length, seedling dry weight, and catalase activity test. The results of this study were: application of plant growth regulators could improve true shallot seed germination, indicated by the observed values of all parameters which were significantly different from those of the control (without PGRs application). The plant growth regulator that produced the best increase in germination was Gibberellins 500 ppm, although the difference in effect with other PGRs was not significantly different. Meanwhile, the osmoconditioning treatment with PEG 6000 was also able to improve the germination of true shallot seeds as indicated by an increase in most of the observed parameters, but in the root length parameter it was seen that the tendency of PEG 6000 3% always gave the highest value but gave the lowest value for this parameter. The best concentration of PEG 6000 in the osmoconditioning treatment to improve true shallot seed germination was 3%.

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