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

scholarly journals Hydrogen Peroxide Metabolism in Interkingdom Interaction Between Bacteria and Wheat Seeds and Seedlings

2020 ◽  
Vol 33 (2) ◽  
pp. 336-348 ◽  
Author(s):  
Davide Gerna ◽  
Thomas Roach ◽  
Birgit Mitter ◽  
Wolfgang Stöggl ◽  
Ilse Kranner
Keyword(s):  
Hydrogen Peroxide ◽  
Seedling Growth ◽  
Triticum Aestivum L ◽  
Plant Colonization ◽  
Plant Microbe Interaction ◽  
Early Seedling Growth ◽  
Ros Metabolism ◽  
Seed Endophytes ◽  
Early Seedling ◽  
Plant Life Cycle

In endophytes, the abundance of genes coding for enzymes processing reactive oxygen species (ROS), including hydrogen peroxide (H2O2), argues for a crucial role of ROS metabolism in plant-microbe interaction for plant colonization. Here, we studied H2O2 metabolism of bread wheat (Triticum aestivum L.) seeds and their microbiota during germination and early seedling growth, the most vulnerable stages in the plant life cycle. Treatment with hot steam diminished the seed microbiota, and these seeds produced less extracellular H2O2 than untreated seeds. Using a culture-dependent approach, Pantoea and Pseudomonas genera were the most abundant epiphytes of dry untreated seeds. Incubating intact seedlings from hot steam–treated seeds with Pantoea strains triggered H2O2 production, whereas Pseudomonas strains dampened H2O2 levels, attributable to higher catalase activities. The genus Pantoea was much less represented among seedling endophytes than genus Pseudomonas, with other endophytic genera, including Bacillus and Paenibacillus, also possessing high catalase activities. Overall, our results show that certain bacteria of the seed microbiota are able to modulate the extracellular redox environment during germination and early seedling growth, and high catalase activity is proposed as a key trait of seed endophytes.

scholarly journals Morphological, physiological, and biochemical responses to NaCl-induced salt stress in mungbean (Vigna radiata L.) varieties

2021 ◽  
Vol 13 (2) ◽  
pp. 10936
Author(s):  
Ganesh D. MANKAR ◽  
Uttam R. WAYASE ◽  
Deepak B. SHELKE ◽  
Tukaram D. NIKAM ◽  
Rajkumar B. BARMUKH
Keyword(s):  
Principal Component Analysis ◽  
Salt Stress ◽  
Seed Germination ◽  
Seedling Growth ◽  
Principal Component ◽  
Salt Tolerant ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Growth Attributes ◽  
Physiological And Biochemical

Seventeen mungbean varieties [Vigna radiata (L.) R. Wilczek] were subjected to 100-400 mM salinity stress at the germination stage, and the indices of seed germination and early seedling growth were analysed. With the increasing salinity, seed germination and seedling growth attributes were affected in all varieties. Principal component analysis and hierarchical cluster analysis of varietal responses on the germination and seeding growth attributes at 400 mM NaCl separated seventeen varieties into four distinct clusters. Principal component analysis at lower salt stress levels indicated that the attributes of germination and early seedling growth are reliable to identify salt-tolerant mungbean varieties. In contrast, only germination attributes are reliable at higher salinity levels. Two salt-susceptible and salt-tolerant varieties were further assessed for NaCl-induced physiological and biochemical changes. Levels of proteins, secondary metabolites, osmolyte, and antioxidants were increased at lower salt concentrations but reduced at higher salt concentrations. Photosynthetic pigments decreased and membrane damage increased under salinity. Varieties that showed tolerance to salt stress can be used in salinity-affected agriculture fields after validating their salt tolerance in field experiments.

EFFECTS OF SALINITY ON INITIAL SEEDLING GROWTH OF CHICKPEA (CICER ARIETINUM L.)

2001 ◽  
Vol 48 (4) ◽  
pp. 337-343 ◽  
Author(s):  
M. Gholipoor ◽  
K. Ghasemi-Golezani ◽  
F. R. Khooie ◽  
M. Moghaddam
Keyword(s):  
Seedling Growth ◽  
The Other ◽  
Cicer Arietinum L ◽  
Early Seedling Growth ◽  
Path Coefficients ◽  
Stressed Seedling ◽  
K Deficiency ◽  
Early Seedling ◽  
K Concentration ◽  
Chickpea Cultivars

In order to investigate the effects of salinity on the early seedling growth of chickpea, four chickpea cultivars, Jam, Hashem (kabuli type: large seeded genotypes with light salmon colour), Kaka and Pirooz (desi type: small seeded genotypes with different colours), were grown in pots containing soils with 0.9 (control), 2.6 and 4.9 dSm-1 salinity. The shoot/root ratio of Pirooz was consistently reduced by increasing salinity at all sampling stages. Under saline conditions, the reduction in seedling growth, shoot water content, root and shoot K+ concentration and the increase in root and shoot Na+ concentration were more severe in the kabuli type than in desi type cultivars. Considering path coefficients, increasing seedling K+ concentration and uptake of water from the soil favoured salt-stressed seedling growth. Increasing K+ content alleviated the deleterious effects of root Na+ to a greater extent than that of shoot Na+. On the other hand, a higher percentage of the decrease in seedling growth as the result of Na+ was due to shoot K+ deficiency than to root K+ deficiency.

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