Effects of NaCl, CaCl2 and their Combination of Salt on Seed Germination and Seedling Growth of Lycopersicum esculentum L.

2014 ◽  
Vol 22 ◽  
pp. 1-15
Author(s):  
S. Sivasankaramoorthy
Keyword(s):  
Seedling Growth ◽  
Peroxidase Activity ◽  
High Salinity ◽  
Growth Stages ◽  
Lycopersicum Esculentum ◽  
Early Seedling Growth ◽  
Seedling Length ◽  
Salinity Levels ◽  
Early Seedling ◽  
High Salinity Level

To compare the effect of NaCl, CaCl2 and their combinations on germination and early seedling growth stages of Lycopersicum esculentum L., were studied under pot experiments 2008. Results indicated that significant increases were recorded in percentage of germination, seedling fresh and dry weights, seedling length, water content, catalase activity and photosynthetic pigments (chlorophyll a, b and total chlorophylls as well as carotenoids) under the low level concentration (20 mM) of NaCl or CaCl and their combination (1:1). On other hand increasing salt concentration in nutrient solution caused significant decrease in all of these parameters. The great reduction occurred under high salinity level of NaCl (50 mM). Meanwhile, peroxidase activity increased significantly with increasing salinity levels from 20 mM to 50 mM of both applied salinity types. Besides, peroxidase activity under NaCl salinity showed a marked increase followed by NaCl + CaCl2 (1:1) and CaCl2 at 50 mM.

scholarly journals Genetic variability of red clover seedlings in relation to salt stress

2014 ◽  
Vol 30 (3) ◽  
pp. 529-538 ◽  
Author(s):  
V. Mandic ◽  
V. Krnjaja ◽  
Z. Bijelic ◽  
Z. Tomic ◽  
A. Simic ◽  
...  
Keyword(s):  
Salt Stress ◽  
Seedling Growth ◽  
Red Clover ◽  
Dry Weight ◽  
Growth Stages ◽  
Early Seedling Growth ◽  
Vigor Index ◽  
Growing Medium ◽  
Early Seedling ◽  
Sterile Plastic

Red clover is highly salt-sensitive plant, especially during germination and early seedling growth stages. The aim of this investigation was to estimate the effects of different saline conditions (0, 50, 100, 150, and 200mM NaCl) on germination and early seedling growth in four red clover varieties (Kolubara, K-32, K-17 and K-39). Germination test was conducted in the laboratory conditions using sterile plastic vessels on filter paper moistened with 10ml of the appropriate salt test solutions. It was observed that the germination energy (GE), germination (G), percentage of dead or infected seeds (DIS), normal seedlings (NS), root length (RL), shoot length (ShL), fresh weight (FW) and dry weight of seedling (DW) and seedling vigor index (SVI) were significantly decreased with increasing concentrations of NaCl in the growing medium. The tested varieties of red clover showed different NaCl tolerance at the seedling stage. Generally, studied red clover varieties are very sensitive to salt, especially K-32 which has the lowest values for GE, G, NS and SVI and highest for DIS. Variety K-17 proved to be a variety that the best tolerates conditions of salt stress because the values for GE, G, NS, RL and SVI were highest. Testing of varieties of red clover in the early seedling growth at different concentrations of NaCl in the growing medium could be helpful in the identification and selection of varieties for cultivation on saline soils.

​Screening of Chickpea (Cicer arietinum L.) Genotypes for Germination and Early Seedling Growth under PEG 6000 Induced Drought Stress

2021 ◽  
Author(s):  
R. Himaja ◽  
K. Radhika ◽  
K. Bayyapu Reddy ◽  
M. Raghavendra
Keyword(s):  
Drought Stress ◽  
Seedling Growth ◽  
Root Length ◽  
Shoot Length ◽  
Growth Stages ◽  
Seedling Vigour ◽  
Peg 6000 ◽  
Early Seedling Growth ◽  
Vigour Index ◽  
Early Seedling

Background: Drought stress at germination and early growth stages hinders the seedling establishment in chickpea which ultimately affects the economic yield. Such adverse affects of drought can be mitigated by screening and identifying the tolerant genotypes of chickpea which is commonly cultivated under rain-fed conditions during post-rainy season. Methods: Effect of drought stress on germination and early seedling growth of thirty three chickpea genotypes was studied under four different concentrations of PEG 6000 (-0.3, -0.6, -0.9 and -1.2 MPa) along with control and hydration under laboratory conditions during 2018-19. Result: Significant variation was observed among the genotypes for germination, root length, shoot length and seedling vigour index under different concentrations of PEG 6000. Complete inhibition of germination was observed in most of the genotypes at -1.2 MPa. Based on the results obtained, JG 11 and NBeG 3 were considered as tolerant since they showed comparatively higher germination, root length, shoot length and seedling vigour even at -1.2 MPa, while NBeG 723 and NBeG 833 were considered as susceptible genotypes because of their poor germination and seedling growth even at lower levels of drought stress.

scholarly journals Response of Bioinoculants to Early Seedling Growth in Sunflower (Helianthus annuus, L.)

2018 ◽  
Vol 1 (2) ◽  
pp. 48-54
Author(s):  
Shyam Sundar Lakshman ◽  
M.K. Ghodke
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Growth Regulators ◽  
Shoot Length ◽  
Growth Stages ◽  
Early Seedling Growth ◽  
Root And Shoot Length ◽  
Early Seedling ◽  
Secondary Roots ◽  
Better Than

The present study was carried out to evaluate the response of different bioagents/biofungicides and growth regulators on seed germination and early seedling growth of sunflower. Eleven (11) treatments were established for the present investigation. Higher germination was observed in T5, T6/T7, T10 and T11 treatments in contrast to other treatments. Treatments T7, T3 and T11 were found significantly better than all other treatments. Generally, root and shoot length increased with the advancement of growth stages. T4 showed higher number of secondary roots in comparison to all other treatments. The shoot length and root length in all the cases (irrespective of the cultivars: DRSH-1, DRSF-108, LSFH-171) were highly influenced by the bioinoculants and chemicals; however, influence of bioagents was found better than the chemicals. Similarly, the seedling weight in 96 hours after sowing and 144 hours after sowing in all the cultivars was reported higher than when the seeds were treated with bioinoculants, which reflected the efficacy of the bioinoculants compared to others.

scholarly journals SEEDLING EMERGENCE AND GROWTH OF THREE CITRUS ROOTSTOCKS UNDER SALT STRESS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 655g-655
Author(s):  
Mongi Zekri
Keyword(s):  
Salt Stress ◽  
High Salinity ◽  
Seedling Emergence ◽  
Shoot Biomass ◽  
Sour Orange ◽  
Early Seedling Growth ◽  
Salt Level ◽  
Salinity Levels ◽  
Early Seedling ◽  
Cleopatra Mandarin

Salt tolerance of Carrizo citrange (CC), sour orange (SO), and Cleopatra mandarin (CM) rootstocks during seedling emergence (SE) and early seedling growth (SG) was studied under greenhouse conditions. Increasing salt (NaCl + CaSO4) concentration delayed and emergence, reduced SG, but did not affect emergence spread. At the first salinity level (5 mmol), emergence of the first seedling (EFS) was delayed by 2 to 3 days in CC and one day in SO but was not affected in CM. At the highest salt level (80 mmol), EFS was delayed by up to 6, 7, and 5 days for CC, SO, and CM, respectively. At the two lowest salinity levels (5 and 10 mmol), final percent emergence (FPE) was not affected in CC but was reduced in SO and CM while shoot biomass was reduced in CC but was not affected in SO and CM. At the 80 mmol salt level, FPE was reduced by 23% in CC and by 33% in SO and CM while SG was reduced by 70% in CC and by 60% in SO and CM. Among the rootstocks studied, the delay in emergence was not necessarily more salt sensitive than FPE. However, SG was generally more affected by salinity than SE, particularly at high salinity levels (20, 40, and 80 mmol).

scholarly journals First Report of Sesame Mutants Tolerant to Severe Drought Stress during Germination and Early Seedling Growth Stages

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1166
Author(s):  
Mohamed Kouighat ◽  
Hafida Hanine ◽  
Mohamed El Fechtali ◽  
Abdelghani Nabloussi
Keyword(s):  
Drought Stress ◽  
Seedling Growth ◽  
Germination Rate ◽  
Germination Percentage ◽  
Growth Stages ◽  
Severe Drought ◽  
First Report ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Sesame Genotypes

In the context of climate change and water scarcity, there is a need to develop and use drought-tolerant sesame cultivars. This study was conducted to evaluate the response of 13 sesame genotypes, including 11 mutants and their wild-types, to drought during germination and early seedling growth. Moderate and severe drought stress was simulated by applying polyethylene glycol (PEG) at two osmotic potentials, −0.6 MPa and −1.2 MPa, respectively, on seeds of two successive mutant generations, M2 and M3. The parameters measured or calculated were germination percentage (GP), germination rate (GR), mean germination time (MGT), root length (RL), shoot length (SL), root to shoot ratio (RSR), and the seedling vigor index (SVI). Results showed the significant effect of genotype, drought, and drought × genotype interaction on all parameters investigated. Under severe drought, seeds of seven genotypes, including wild types, were not able to germinate. There was a drastic decline of all parameters for the rest, except MGT and RSR, which markedly increased. Interestingly, two mutants, “ML2-5” and “ML2-10”, were identified as the most tolerant to severe drought and the most stable over both generations. The present work is the first report of sesame germplasm with such a high level of tolerance to drought during germination and early seedling growth stages.

The effect of salinity on early seedling growth of seeds of three wheat (Triticum aestivum L.) cultivars

1995 ◽  
Vol 75 (1) ◽  
pp. 175-177 ◽  
Author(s):  
R. Reggiani ◽  
A. Bertani ◽  
S. Bozo
Keyword(s):  
Triticum Aestivum ◽  
Seedling Growth ◽  
Triticum Aestivum L ◽  
The Other ◽  
Salt Tolerant ◽  
Ion Regulation ◽  
Sodium Accumulation ◽  
Early Seedling Growth ◽  
Salinity Levels ◽  
Early Seedling

We studied the effects of three salinity levels (50, 100 and 150 mM NaCl) on the early seedling growth of three wheat (Triticum aestivum L.) cultivars of Albanian origin characterized by different sensitivities to salt. Sodium accumulation was similar in seedlings of different cultivars and, in general, Na+ was confined to the root. Chloride accumulated at high levels in both the root and the shoot but least so in Daity. No appreciable differences were observed in K+ content. The most salt-tolerant cultivar showed a higher capacity for osmoregulation than the other two cultivars. Key words: Ion regulation, ion toxicity, osmoregulation, salinity, Triticum aestivum

Sign in / Sign up

Export Citation Format

Share Document