Ca+2 Sinyallerinin Bitki İmmünitesindeki Rolü

Öz

Bitkilerin en önemli besin maddelerinden biri olan kalsiyum iyonları, bitki gelişimi ve immünitesinde önemli sinyal verme aracı moleküllerinden birisidir. Biyotik bir uyarana karşı bitki membranında bulunan kalsiyum iyon kanallarıyla hücreye giriş yapan Ca+2 katyonları fazla biriktiğinde, sitoplazmada homeostazı sağlamak amacıyla ACA protein kanallarıyla hücre dışına verilmektedir. Kalsiyumun sitoplazmik salınımı, özellikle immünitenin daha ileri aşamalarında kalmodulin ve kalmodulin benzeri proteinlere bağlı olarak gerçekleşecek olan olayların aktif hale geçirilmesi için önemlidir. Kalsiyumun bitki immünitesindeki rolü bir MAMP olan FLS2 ile ilgili yapılan araştırmalarla kısmen ortaya konmuştur. Biyotik bir uyarıcının bitki membran reseptörleriyle algılandıktan sonra Ca+2 iyon akışıyla immün tepki arasında nasıl bağlantı olduğunu ortaya çıkarmak amacıyla bu derleme ele alınmıştır.

Anahtar Kelimeler

• Kalsiyum sinyallleri
• ACA
• Bitki immünitesi
• Kalsiyum pompası

The Role of Ca2+ Signals in Plant Immunity

Abstract

Calcium ions, one of the most important nutrition in plants, are also one of the important mediator components in plant development and immunity. Ca2+ cations influxed into cell with ion channels in the plant membrane to biotic stimuli are effluxed in excessively accumulation outside cell through ACA protein channels to regulate homeostasis in cytoplasm. Cytoplasmic oscillation of Ca2+ is significant to activate the down regulation of immune cascade to occur depending calmodulin and calmodulin like proteins. The role of calcium in plant immunity has been partially uncovered in researches with associated with FLS2, a MAMP. Aim of this mini review is to disclosed the relationship between Ca2+ ion flux and immune reaction after a biotic stimulant is perceived via plant membrane surface receptors. 

Kaynakça

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