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Rouhollah Karimi Mehdi Ghabooli Jamshid Rahimi Masoomeh Amerian 《Journal of plant nutrition》2020,43(14):2226-2242
AbstractIn this research the effect of foliar application of selenium (Se) at four levels (Na2OSe4; 0, 5, 10 and 20?mg L?1) was evaluated on some phytochemical characteristics of Sultana grapevine under different salinity levels (NaCl; 0 or 75?mM). The vines were fed twice a week with Hoagland nutrient solution and Se was foliar applied twice with 24 intervals. During growing period, plant height, leaf number and leaf area were recorded. Moreover, at the end of experiment, mature leaves from middle nods of canes were used for measurement of some phytochemical indices. According to results, Se application had a positive effect on plant height, leaf numbers, leaf area and photosynthetic pigments content especially at 5?mg L?1 and to some extent 10?mg L?1 Se levels. Under salinity stress, foliar application of Se at 5?mg L?1 considerably decreased vines leaves electrolyte leakage and lipid peroxidation values compared to non se-treated plants under salinity stress condition. Selenium had an additive effect on salinity stress (75?mM NaCl) induced accumulation of total phenol, total flavonoid, soluble sugars and proline content in leave of vines. Moreover, the interaction of salinity and Se at 5 and 10?mg L?1 improved leaves antioxidant enzymes activities in Sultana grapevine. Likewise, foliar application of Se improved leaf mineral content in 75?mM NaCl -treated vines. Totally, foliar application of selenium (Se at 5 or 10?mg L?1) increased salt tolerance through improvement in nutritional balance and by enzymatic and non-enzymatic antioxidant capacity in grapevine leaves. 相似文献
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Inga Morocko Jamshid Fatehi Berndt Gerhardson 《European journal of plant pathology / European Foundation for Plant Pathology》2006,114(3):235-244
Gnomonia fragariae has been occasionally listed among the fungi associated with diseased strawberry plants. However its pathogenicity has not
been established. During the investigation on strawberry decline in Latvia and Sweden, a fungus was repeatedly recovered from
discoloured root and crown tissues of severely stunted plants. Attempts to induce sporulation of the isolates grown on several
agar media resulted in the formation of mature ascomata only on potato carrot agar and oatmeal agar. On morphological grounds
and comparisons with reference herbarium specimens these isolates were identified as Gnomonia fragariae. The pathogenicity of the fungus was evaluated initially in the detached leaf assay and subsequently in three bioassays on
strawberry plants. All the bioassays showed that G. fragariae was pathogenic on strawberry and capable of causing severe root rot and petiole blight. The symptoms that developed in the
greenhouse experiments closely resembled those observed in the fields. The fungus did not cause rapid plant death but growth
and development of inoculated strawberry plants was severely affected. To our knowledge this is the first time when pathogenicity
of G. fragariae as a root rot pathogen has been clearly established. Our study shows that G. fragariae is one of the serious pathogens involved in the root rot complex of strawberry in Latvia and Sweden. 相似文献