Influence of Selected Bacteria Isolates on Sugar Beet Growth and Nutrient Uptake in Cadmium Enriched Soil

Year 2020, - Türkiye 13. Ulusal, I. Uluslararası Tarla Bitkileri Kongresi Özel Sayısı, 95 - 102, 07.04.2020

Ahmet Demirbaş , Ali Coşkan , Amer Abdulhadi Jawad

Abstract

A pot experiment
was conducted in order to determine the effects of 6 selected potential PGPR on
growth and nutrient uptake of sugar beet under Cd enriched soils at Sivas
condition. Bacteria were previously isolated and tested on maize in Soil
Biology Laboratory of Isparta University of Applied Sciences. In this study,
the most effective isolates out of 4 from each province as Adana (Ad), Antalya
(An), Hatay (Ha), Isparta (Is), Ordu (Or) and Sivas (Si) selected as potential
PGPR considering their previously determined performance. In the study, the
effects of above mentioned bacteria on sugar beet performance under 5 mg kg-1
Cd enriched condition was determined.

Results revealed
that Cd application significantly (p<0.05) reduced plant biomass development
whereas bacteria inoculation increased plant dry matter weight. However, in the
Cd enriched condition, bacteria inoculation further improved plant dry weight
where the higher value was observed in dual application of B1 and 5 mg kg-1
Cd application as 43.1 g plant-1. This result alone indicates that
certain bacterium application may reduce the negative effects of cadmium. Among
the Cd applied pots, B5 is an exception, all bacteria application increased
plant biomass development. Cadmium application also reduced zinc uptake of
plant in accordance the antagonistic effect of cadmium on zinc uptake; yet,
bacteria inoculation may help plant to uptake slightly more zinc even under
cadmium contaminated soils.

Keywords

Bacteria isolates, bio-fertilizer, cadmium, PGPR, sugar beet nutrition

Seçilmiş Bakteri İzolatlarının Kadmiyum ile Zenginleştirilmiş Topraklarda Şeker Pancarının Gelişimi ve Besin Elementi Alımı Üzerine Etkisi

Abstract

Seçilen
6 bakterinin kadmiyum ile zenginleştirilmiş topraklarda yetiştirilen şeker
pancarı bitkisinin gelişimi ve besin elementi alımına etkilerini belirlemek
amacıyla, Sivas koşullarında saksı denemesi yürütülmüştür. Bakteriler daha önce
Isparta Uygulamalı Bilimler Üniversitesi Toprak Biyoloji Laboratuvarında izole
edilmiş ve mısır üzerinde test edilmiştir. Çalışmada Adana (Ad), Antalya (An),
Hatay (Ha), Isparta (Is), Ordu (Or) ve Sivas (Si) illerinin her birinden izole
edilen 4 bakteriden, daha önceki performansları göz önüne alınarak en etkili
olan birer taneleri seçilmiştir.Çalışmada, yukarıda sözü edilen bakterilerin 5
mg kg-1 Cd ile zenginleştirilmiş toprakta yetiştirilen şeker pancarı
performansı üzerindeki etkileri belirlenmiştir.

Sonuçlar
Cd uygulamasının bitkinin biyokütle gelişimini önemli ölçüde (p<0.05)
azaltırken, bakteri aşılamanın bitkinin kuru madde ağırlığını arttırdığını
göstermiştir. Bununla birlikte, Cd ile zenginleştirilmiş durumda bakteri
aşılaması, bitki kuru ağırlığını daha da arttırmış, en yüksek değer 43.1 g
bitki-1 ile B1 ve 5 mg kg-1 Cd uygulamasından elde
edilmiştir. Tek başına bu sonuç bile belirli bakterilerin uygulanmasının
kadmiyumun olumsuz etkilerini azaltabildiğini gösterir niteliktedir. B5 hariç
olmak üzere kadmiyum uygulanan saksılardaki bakteri uygulamalarının hepsi
bitkinin biyokütlesini artırmıştır. Kadmiyum ile çinko arasındaki antagonsitik
ilişkiye uygun olarak, kadmiyum uygulamaları çinko alımını azaltmıştır. Ancak
bakteri uygulamaları kadmiyum uygulanan koşullarda bile çinko alımını
artırmıştır.

Keywords

Kadmiyum, PGPR, bakteri izolatları

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