scholarly journals Polyamine-Mediated Transcriptional Regulation of Enzymatic Antioxidative Response to Excess Soil Moisture during Early Seedling Growth in Soybean

Biology ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 185
Author(s):  
Gagandip K. Sidhu ◽  
Pham Anh Tuan ◽  
Sylvie Renault ◽  
Fouad Daayf ◽  
Belay T. Ayele
Keyword(s):  
Root Growth ◽  
Seed Treatment ◽  
Expression Patterns ◽  
Embryo Axis ◽  
Sod Activity ◽  
Early Seedling Growth ◽  
Excess Moisture ◽  
Early Seedling ◽  
Shoot And Root Growth ◽  
Positive Effect

This study examined the expression patterns of antioxidative genes and the activity of the corresponding enzymes in the excess moisture-stressed seedlings of soybean in response to seed treatment with polyamines, spermine (Spm) and spermidine (Spd). At the 4 day after planting (DAP) stage, the excess moisture impaired the embryo axis growth, and this effect is associated with the downregulation of superoxide dismutase (GmSOD1) expression and SOD activity in the cotyledon. Seed treatment with Spm reversed the effects of excess moisture on embryo axis growth partly through enhancing glutathione reductase (GR) activity, in both the cotyledon and embryo axis, although no effect on the GmGR expression level was evident. Excess moisture inhibited the shoot and root growth in 7 DAP seedlings, and this is associated with decreased activities of GR in the shoot and SOD in the root. The effect of excess moisture on shoot and root growth was reversed by seed treatment with Spd, and this was mediated by the increased activities of ascorbate peroxidase (APX), catalase (CAT) and GR in the shoot, and APX in the root, however, only GR in the shoot appears to be regulated transcriptionally. Root growth was also reversed by seed treatment with Spm with no positive effect on gene expression and enzyme activity.

Putrescine Reduces NaCl-Induced Inhibition of Germination and Early Seedling Growth of Rice (Oryza sativa L.)

1988 ◽  
Vol 15 (6) ◽  
pp. 761 ◽  
Author(s):  
L Prakash ◽  
G Prathapasenan
Keyword(s):  
Salt Stress ◽  
Water Uptake ◽  
Seedling Growth ◽  
Oryza Sativa L ◽  
Chloride Ions ◽  
Embryo Axis ◽  
Nacl Solution ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Germination And Growth

Changes induced by NaCl and putrescine during germination and early seedling growth of rice were examined for 120 h. Rates of germination and growth of embryo axis decreased when seeds were subjected to salt stress (100, 150 and 200 mM NaCl). NaCl at 150 mM concentration significantly reduced the water uptake of seeds and the rate of mobilisation of reserves. All concentrations of putrescine (0.001, 0.01, 0.1 and 1.0mM) applied exogenously to seeds increased the rate of germination and seedling growth when NaCl(150 mM) was also present and 0.01 mM putrescine gave maximum response. Addition of putrescine (0.01 mM) to NaCl solution (150 mM) reduced the net accumulation of sodium and chloride ions in seeds and increased their water uptake. Thus, putrescine can alleviate the adverse effects of NaCl during germination and early seedling growth of rice.

Role of endophytes in early seedling growth of plants: a test using systemic fungicide seed treatment

2018 ◽  
Vol 24 (1) ◽  
pp. 86-95 ◽  
Author(s):  
M. M. Vasanthakumari ◽  
Jambagi Shridhar ◽  
R. J. Madhura ◽  
Mohanasundaram Nandhitha ◽  
Chinnasamy Kasthuri ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seed Treatment ◽  
Systemic Fungicide ◽  
Early Seedling Growth ◽  
Early Seedling

scholarly journals Potassium Nitrate Treatment Is Associated with Modulation of Seed Water Uptake, Antioxidative Metabolism and Phytohormone Levels of Pea Seedlings

Seeds ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 5-15
Author(s):  
José A. Hernández ◽  
Pedro Díaz-Vivancos ◽  
José Ramón Acosta-Motos ◽  
Gregorio Barba-Espín
Keyword(s):  
Plant Species ◽  
Water Uptake ◽  
Seedling Growth ◽  
Seed Treatment ◽  
Potassium Nitrate ◽  
Antioxidant Defences ◽  
Early Seedling Growth ◽  
Pea Seedlings ◽  
Early Seedling ◽  
Gas Ratio

(1) Background: Seed treatment with potassium nitrate (KNO3) has been associated with dormancy breaking, improved germination and enhanced seedling growth and uniformity in a variety of plant species. However, the KNO3 effect seems to be dependent on plant species and treatment conditions. (2) Methods: We describe the effect of incubation of dry pea seeds with different KNO3 concentration on water uptake kinetic, early seedling growth, antioxidant metabolism and hormone profile in pea seedlings. (3) Results: Low (0.25 mM) KNO3 levels increased seedling water uptake and growth, whereas high (40 mM) levels decreased seedling growth. KNO3 treatment differentially affected the antioxidant defences. Low KNO3 levels maintained the activity of antioxidant enzymes, while high levels reduced the activity of H2O2-scavenging enzymes. KNO3 induced a progressive decline in ascorbate levels and reduced (GSH) and oxidised (GSSG) glutathione. Low KNO3 levels strongly increased GA1 and decreased ABA in both seedlings and cotyledons, resulting in a decline in the ABA/GAs ratio. (4) Conclusions: Pea seed treatment with a low KNO3 level promoted early seedling growth. In this process, an interaction among KNO3, antioxidant defences and ABA/GAs ratio is proposed.

scholarly journals Imidacloprid seed treatments for the control of springtails in seedling brassicas

2002 ◽  
Vol 55 ◽  
pp. 317-321 ◽  
Author(s):  
P.J. Addison ◽  
P.W. Fisher
Keyword(s):  
Adverse Effect ◽  
Seedling Growth ◽  
Seedling Establishment ◽  
Seed Treatment ◽  
Field Trials ◽  
Seed Treatments ◽  
Early Seedling Growth ◽  
Pot Trials ◽  
Early Seedling

Two pot trials and two field trials were conducted to evaluate imidacloprid seed treatments for springtail control in forage brassica seedlings Imidacloprid at rates from 175 to 210 g ai/kg seed reduced garden springtail (Bourletiella hortensis) and lucerne flea (Sminthurus viridis) numbers by 6888 relative to the untreated controls Springtail damage was reduced and seedling establishment enhanced Imidacloprid proved as or more effective than furathiocarb or thiodicarb seed treatments and phorate granules Imidacloprid seed treatment had no adverse effect on either brassica germination or early seedling growth

scholarly journals Early Seedling Growth as a Tool to Assess the Tolerance of Urochloa brizantha Cultivars to Free Aluminium

2018 ◽  
Vol 10 (7) ◽  
pp. 67
Author(s):  
Cláudia Jaqueline Tome Yamamoto ◽  
Mariana Bassanezi Gasparim ◽  
Nelson Barbosa Machado-Neto ◽  
Ceci Castilho Custodio
Keyword(s):  
Root Growth ◽  
Seedling Growth ◽  
Seed Quality ◽  
Dry Mass ◽  
Stress Conditions ◽  
Early Seedling Growth ◽  
Germination Assay ◽  
Growth Assay ◽  
Early Seedling ◽  
Urochloa Brizantha

In this study we aimed to evaluate changes in germination, early seedling growth, and some biochemical parameters in Urochloa brizantha cultivars (Basilisk, Marandu, MG4, MG5, BRS Piatã, and Xaraés) subjected to five levels of free aluminium toxicity (0, 1, 2, 4, and 8 mmolc dm³ Al³+), and to verify the selection efficiency of aluminium tolerant cultivars. In the germination assay, lots were submitted to germination under simulated stress conditions in the laboratory, to quantify root protrusion, number of normal seedlings, shoot and root length, and dry mass. In the early seedling growth assay, evaluations were done on the seventh day after subjecting seedlings to aluminium stress conditions. Relative growth rate of length, and dry mass of shoots and roots, superoxide dismutase activity (SOD), and concentrations of proline, total antioxidants (TEAC), and malondialdehyde (MDA) were evaluated. During the seedling study period, up to 14 days after sowing, the most tolerant cultivar maintained root growth in aluminium stress conditions, while the most susceptible cultivar reduced root growth, and developed proportionally more shoots, as shoot growth depends on seed reserves. The germination assay indicated interference of the initial seed quality with increasing Al3+ concentrations. The results indicate that the early seedling growth assay, which excluded germination effects, and used the measurement of root attributes, is appropriate for the discrimination of Al3+ tolerant genotypes. The Marandu cultivar was the most similar to the Al3+ tolerance standard Basilisk cultivar.

Effects of salinity on seedling emergence and early seedling growth of Irvingia gabonensis (Irvingiaceae)

2017 ◽  
Vol 45 (2) ◽  
pp. 282-295
Author(s):  
R. Vihotogbé ◽  
C. Watson ◽  
R. Glèlè Kakaï ◽  
F. Wichern ◽  
B. Sinsin ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seedling Emergence ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Irvingia Gabonensis
Sign in / Sign up

Export Citation Format

Share Document