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Accueil du site → Master → Turquie → The Effects of Some Bacteria (Serratia marcescens and Stenotrophomonas maltophilia) and Potassium Nitrate Applications to Salt Tolerance in Pepper Plants

Eskisehir Osmangazi Üniversitesi (2014)

The Effects of Some Bacteria (Serratia marcescens and Stenotrophomonas maltophilia) and Potassium Nitrate Applications to Salt Tolerance in Pepper Plants

Alveroğlu, Volkan

Titre : The Effects of Some Bacteria (Serratia marcescens and Stenotrophomonas maltophilia) and Potassium Nitrate Applications to Salt Tolerance in Pepper Plants

Bazı bakteri (serratia marcescens ve stenotrophomonas maltophilia) ve potasyum nitrat uygulamalarının biber bitkisinin tuza toleransı üzerine etkileri

Auteur : Alveroğlu, Volkan

Université de soutenance : Eskisehir Osmangazi Üniversitesi

Grade : Master of Science (MS) 2014

Résumé
The effects of bacteria and potassium applications on pepper plants cv. Sıla F1 during seedling stage under salt stress conditions were investgated. In the experiment the salt was given in the form of sodium chloride (NaCl) and Potassium nitrate (KNO3) as a potassium fertilizer and Serratia marcescens and Stenotrophomonas maltophilia as bacteria were used. Plants were grown under controlled greenhouse conditions at 30/17 ºC (day/night) temperature with relative humidity 50 %. After 5 days from planting when the plants had developed 4-5 true leaves, 10 mL bacteria sollution was injected to root region of the seedlings and was started to NaCl and potassium (K) applications. 0 mM (Control), 50 mM, 100 mM and 150 mM NaCl were used as the main application matter and Control, Stenotrophomonas maltophilia, Serratia marcescens, Stenotrophomonas maltophilia+50 mM Potassium, Serratia marcescens+50 mM Potassium and 50 mM Potassium were used as the sub application matter. Salt stress affects the plant growth negatively and reduced the dry weight. The bacteria and K applications decreased this inhibitory effect especially at 50 and 100 mM NaCl concentrations. Leaf relative water content and memrane stability index values were reduced depending on the increase in salt concentration in pepper plants cv. Sıla. The SPAD values were not affected from the salt application. The SPAD values have improved with bacteria and K applications especially at 50 and 100 mM NaCl concentrations. The amount of Na ion increased with salt applications and it was observed that Na ion accumulated utmost in the stems. The Na amount in leaf and root parts of the seedlings decreased with bacteria and K applications. With the effect of salt applications, the amount of K and Mg decreased ; while the amount of Ca increased. K and Ca ions were at least in the roots, secondly in the stems, utmost in the leaves. The amount of K and Mg in leaf and root parts of the seedlings increased with bacteria and K applications. Mg content increased with bacteria applications especially at 50 mM NaCl application. Cl ion was utmost in the leaves and in the stems. It was determined that, bacteria application did not effect the amount of Cl, while K application partly to reduce the rate of Cl content.

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