Does zinc uptake relate well with differential zinc efficiency of barley genotypes?

SummaryEnhancement of the resistance level in plants by rhizobacteria has been proven in several pathosystems. This study investigated the ability of four rhizobacteria strains (Pseudomonas putida BTP1 and Bacillus subtilis Bs2500, Bs2504 and Bs2508) to promote the growth in three barley genotypes and protect them against Cochliobolus sativus. Our results demonstrated that all tested rhizobacteria strains had a protective effect on barley genotypes Arabi Abiad, Banteng and WI2291. However, P. putida BTP1 and B. subtilis Bs2508 strains were the most effective as they reduced disease incidence by 53 and 38% (mean effect), respectively. On the other hand, there were significant differences among the rhizobacteria-treated genotypes on plant growth parameters, such as wet weight, dry weight, plant height and number of leaves. Pseudomonas putida BTP1 strain was the most effective as it significantly increased plant growth by 15-32%. In addition, the susceptible genotypes Arabi Abiad and WI2291 were the most responsive to rhizobacteria. This means that these genotypes have a high potential for increase of their resistance against the pathogen and enhancement of plant growth after the application of rhizobacteria. Consequently, barley seed treatment with the tested rhizobacteria could be considered as an effective biocontrol method against C. sativus.

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Effects of maternal smoking on zinc uptake by placental microvillous border membranes

Placenta ◽

10.1016/s0143-4004(05)80481-3 ◽

1993 ◽

Vol 14 (4) ◽

pp. A8

Author(s):

P. Bush ◽

D.R. Abramovich ◽

P.J.A. Aggett ◽

M. Bain ◽

M.D. Burke ◽

...

Keyword(s):

Maternal Smoking ◽

Zinc Uptake

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The combined effect of nitrogen fertilizer and sowing season on response to water-limited stress in barley (Hordeum vulgare L.)

The Journal of Agricultural Science ◽

10.1017/s0021859621000149 ◽

2021 ◽

pp. 1-19

Author(s):

S. Bardehji ◽

H. R. Eshghizadeh ◽

M. Zahedi ◽

M. R. Sabzalian ◽

M. Gheisari

Keyword(s):

Block Design ◽

Soluble Carbohydrate ◽

Total Biomass ◽

Nitrogen Application ◽

Hordeum Vulgare L ◽

High Positive Correlation ◽

Irrigation Level ◽

Sowing Season ◽

Response To Water ◽

Barley Genotypes

Abstract A field experiment was carried out for over two seasons (autumn and spring) as a split–split plot scheme based on a randomized complete block design with three replications. The main plots included two irrigation levels of the maximum available water depletion (maximum allowable depletion (MAD)) of 55 and 85% as non-stress and drought-stress environments, respectively, and the subplot accommodated two levels of nitrogen (0 and 62.5 kg N/ha, urea fertilizer); also, 20 barley genotypes were assigned to the sub-subplots. The biplot analysis of both sowing seasons showed that grain yield (GY) had a high positive correlation with total biomass (TB), whereas it had a high negative correlation with proline and total soluble carbohydrate as drought-tolerance-determinant characteristics. The genotypes which had the lowest and highest GY ranked significantly (P ≤ 0.01) different with changing the sowing season under each irrigation level, indicating a larger plant interaction and non-stability in response to the season change (about two-fold), as compared to the change in the irrigation conditions. It could also be concluded that barley genotypes might experience a higher decrease in GY and sensitivity to water deficit in the autumn sowing season, as compared to the spring planting season, which was also intensified by nitrogen application. However, the response to nitrogen application depends on the plant genotype.

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