Tuz Stresi Altındaki Mısır Bitkisinde (Zea mays L.) Stres Parametreleri Üzerine Ca, Mg ve K’nın Etkileri

Year 2006, Volume: 19 Issue: 1, 59 - 67, 01.06.2006

S. Yakıt A. L. Tuna

Abstract

Tuz stresi altındaki mısır bitkisinde (Zea mays L.) stres parametreleri üzerine (membran geçirgenliği, nispi su içeriği, prolin, klorofil ve karotenoid miktarları ile yaprak ve köklerde makro elementler) kalsiyum (Ca), potasyum (K) ve magnezyumun (Mg) etkileri araştırılmıştır. Mısır bitkisine tuz ile ilave olarak verilen kalsiyum, magnezyum ve potasyumlu bileşikler membran geçirgenliği ve bağıl su içeriği üzerine iyileştirici etki yapmış, tuzun olumsuz etkilerini kısmen hafifletmiştir. Prolin oranı tuz uygulamasıyla beraber artmıştır. Toplam klorofil ve toplam karotenoid miktarları tuz uygulamasından olumsuz etkilenmiş ancak besin çözeltisine ilave edilen kalsiyum, magnezyum ve potasyumlu bileşikler tuzun olumsuz etkisini kısmen hafifletmiş, kontrol ve tuz grubuna göre iyileştirici etki yapmışlardır. Hasat sonrası, yapraklarda membran geçirgenliği ( %EC ) , bağıl su içeriği ( %RWC ) , prolin, klorofil ve karotenoid miktarları tayin edilmiş, yaprak ve köklerde makro element (N, P, K, Ca, Mg, Na) analizleri yapılmıştır. Ayrıca bazı bitki gelişim parametreleri (sürgün ve kök kuru ağırlığı, bitki boyu, gövde çapı) saptanmıştır

Keywords

Mısır, Zea mays L., Tuz Stresi, Kalsiyum, Potasyum, Magnezyum

The Effects of Ca, K and Mg on the Stress Parameters of the Maize (Zea mays L. ) Plant under Salinity Stress

Abstract

The impacts of calcium, magnesium and potassium on the stress parameters (membran permeability, relative water content, prolin, chlorophyll and carotenoid contents and macronutrients in leaves and roots) of maize plant (Zea mays L.) under salt stress were investigated. The compound of Ca, Mg and K given to the maize plant besides the salt addition a positive impact to the rates of %EC and %RWC and partially ameliorated the negative effects of the salt. The rate of proline increased during the salt treatment. The total content of chlorophyll and carotenoid were affected negatively during the salt treatment. However, the additional compounds of Ca, Mg and K in nutrient solution partially ameliorated the negative impact of the salt and led to better impact than the control and salt group. After the harvest, the membran permeability (%EC), relative water content (%RWC), prolin, chlorophyll and carotenoid contents in the leaves and macronutrient contents (N, P, K, Ca, Mg, Na) in leaves and roots were determined. Besides, some plant growth parameters (shoot and root dry matter, stem height, stem diameter) were also determined.

Keywords

Maize, Zea mays L., salt stress, calcium, potassium, magnesium

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