scholarly journals INFLUENCE OF NaCL SALINITY ON GERMINATION AND EARLY SEEDLING GROWTH IN WHEAT (Triticum aestivum, L.).

2010 ◽  
Vol 1 (2) ◽  
pp. 333-345
Author(s):  
M. Helaly ◽  
Z. Mohamed ◽  
M. Abdel Maksoud ◽  
Sally Arafa
Keyword(s):  
Triticum Aestivum ◽  
Seedling Growth ◽  
Triticum Aestivum L ◽  
Nacl Salinity ◽  
Early Seedling Growth ◽  
Early Seedling

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.

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