scholarly journals Ifluenţa fosforului si tulpinilor rizobacteriene asupra dezvoltării sistemului radicular la plante de soia (Glycine max L. MERR.) în condiţii deficitului de fosfor si umidiate

2021 ◽  
Author(s):  
Vladimir Rotaru ◽  
Keyword(s):  
Soil Moisture ◽  
Crop Production ◽  
System Development ◽  
Abiotic Factors ◽  
Nutrient Deficiency ◽  
Azotobacter Chroococcum ◽  
P Deficiency ◽  
Root System Development ◽  
Glycine Max L ◽  
Soybean Plants

Drought and nutrient deficiency are major abiotic factors that limits crop production. This study determined the effect of phosphorus (P) and rhizobacteria application on root system development of soybean plants subjected to P deficiency and drought. The P application alone or in combination with bacteria strains (Pseudomonas fluorescence and Azotobacter chroococcum) increased total roots length irrespective of soil moisture. Root growth of cultivar Horboveanca responded more evidently to treatment with rhizobacteria than cultivar Zodiac under P deficiency. Thus, the experimental results demonstrated that the effectiveness of integrated use of P and rhizobacteria (Pseudomonas fluorescence and Azotobacter chroococcum) promotes roots development of soybean plants under normal soil moisture as well as under temporary drought.

scholarly journals Identification of Triticum durum genotypes showing increased tolerance to oxidative stress

2020 ◽  
Vol 75 (1) ◽  
pp. 43-65
Author(s):  
JUSTYNA LEŚNIOWSKA-NOWAK ◽  
MAGDALENA SOZONIUK ◽  
MAGDALENA KAWĘCKA ◽  
KORNELIA MAGA ◽  
MAŁGORZATA MROZEK
Keyword(s):  
Oxidative Stress ◽  
Durum Wheat ◽  
Root System ◽  
Growth And Development ◽  
Triticum Durum ◽  
Methyl Viologen ◽  
System Development ◽  
Abiotic Factors ◽  
Root System Development ◽  
Different Types

Oxidative stress can significantly impair the plants growth and development. It can be triggered by various biotic and abiotic factors. The study analyzed durum wheat genotypes aiming at identifying the forms characterized by increased tolerance to stress induced by methyl viologen (paraquat). The presence of paraquat in the medium caused the majority of analyzed forms to reduce the weight and length of the shoot part of seedling. In addition, inhibition of the root system development compared to control forms was observed. In some of the forms studied, oxidative stress caused chlorosis. Six different types of responses to oxidative stress were found. Most genotypes (58.8%) showed a reduction in seedling weight and length, irrespective of the paraquat concentration used. Nine genotypes resistant to stressor (CYP, MEX × 2, ETH, FRA, ITA, POL, SUN, TUN) were identified, which constituted 6.1% of the examined forms.

scholarly journals Efecutul rhizobacteriilor benefice asupra formării sistemului simbiotic Glycine Max-Bradyrhizobium Japonicum în funcţie de fertilizare şi nivelul de umiditate a solului

2020 ◽  
Author(s):  
Vladimir Rotaru ◽  
Keyword(s):  
Soil Moisture ◽  
Pseudomonas Putida ◽  
Bradyrhizobium Japonicum ◽  
System Development ◽  
Organic Fertilizers ◽  
Organic Fertilization ◽  
Combined Application ◽  
Moderate Drought ◽  
Soybean Plants ◽  
Moisture Conditions

A pot experiment under controlled soil moisture conditions was accomplished with the aim to assess the effect of rhizobacteria application Bradyrhizobium japonicum alone or in conjuction with Pseudomonas putida strain on symbiotic system development of soybean in relation to phosphorus and manure fertilization under temporary drought conditions. Mineral and organic fertilizers were applied during filling pots with soil. A half of plants were subjected to moderate drought for 12 days at flowering stage. The experimental results showed that number of nodules increased after rhizobacteria application under mineral as well as under organic fertilization irrespective of soil moisture levels. The highest effect of rhizobacteria was registered in plants under normal irrigation conditions. Experimental data find out that combined application of two rhizobacteria strains displayed synergic effect on nodules development. Thus, the results suggested that application of B. japonicum and Pseudomonas putida strains as biofertilizer contributed to enhance tolerance of soybean plants and promote nodules development under water limited conditions.

scholarly journals Dry Matter Production and Root System Development of Rice Cultivars under Fluctuating Soil Moisture

2000 ◽  
Vol 3 (2) ◽  
pp. 197-207 ◽  
Author(s):  
Dionisio M. Bañoc ◽  
Akira Yamauchi ◽  
Akihiko Kamoshita ◽  
Len J. Wade ◽  
Jose R. Pardales
Keyword(s):  
Soil Moisture ◽  
Root System ◽  
Dry Matter ◽  
System Development ◽  
Dry Matter Production ◽  
Rice Cultivars ◽  
Root System Development ◽  
Matter Production

scholarly journals Root Distribution of `Gulfcoast' Southern Highbush Blueberry

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 428A-428
Author(s):  
J.M. Spiers
Keyword(s):  
Soil Moisture ◽  
Root Growth ◽  
Root System ◽  
Root Distribution ◽  
System Development ◽  
Dry Weight ◽  
Highbush Blueberry ◽  
Root System Development ◽  
Highbush Blueberries ◽  
Southern Highbush

A field study was conducted to evaluate individual and collective influences of three soil moisture-supplementing practices (irrigation, incorporated peatmoss, and mulching) on root system development in `Gulfcoast' southern highbush blueberries. Root growth was least in plants not mulched and greatest in plants receiving all three supplements. Ranking of individual treatments on root dry weight production was mulch > incorporated peatmoss = irrigation. Mulching resulted in uniform root distribution from the plant crown outward and in root growth concentrated in the upper 15 cm of soil. Other practices (peatmoss > irrigation) tended to concentrate the root system near the crown area and resulted (peatmoss = irrigation) in greater root depth. Soil moisture appeared to be the major factor influencing root distribution.

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