Evidences for the presence of caspase-like activities in plants

Öz

Organizing the activation of cell division and cell death in animals and plants may lead a variety of developmental processes for instance determining of cells, tissues and organs.  But, cell death also is used in a number of other processes such as control of cell populations and defense against invading microbes. Beyond the similarities between plant and animal programmed cell death (PCD), the molecular mechanisms underlying the cellular changes in plant remain unclear. In particular there is no indication in plant genomes for genes orthologous to caspases. Proteases not connected to caspases are thought to be related in PCD in plant cells in recent years there are numerous studies showing that caspase inhibitors can suppress cell death in plants. The aim of this review is to focus on recent advances in PCD molecular mechanisms in plants.

Anahtar Kelimeler

• PCD, plant, caspases

Kaspaz benzeri aktivitelerin bitkilerdeki varlığına ilişkin kanıtlar

Öz

Hayvanlarda ve bitkilerde hücre bölünmesi ve ölümü olayları ile ilgili aktivitelerin organizasyonu hücrelerin, dokuların ve organların belirlenmesi gibi farklı olaylara neden olabilir.  Fakat hücre ölümü aynı zamanda hücre sayısının kontrolü ve mikropların saldırısından korunma gibi daha birçok olaylarda kullanılmaktadır. Bitki ve hayvanlarda programlı hücre ölümünde benzerlikler olmasına rağmen bitkilerde meydana gelen hücresel değişikliklerin moleküler mekanizması hala açıklık kazanmamıştır.  Özellikle bitki genomunda kaspazlarla ortoloji gösteren genler belirlenememiştir. Bitkilerdeki programlı hücre ölümü ile ilgili olduğu düşünülen proteazlar kaspazlarla ilişkili değildir. Birçok araştırma kaspaz ket vurucularının bitkilerde programlı hücre ölümünü baskıladığını ortaya koymuştur.  Bu makalenin amacı bitkilerde meydana gelen programlı hücre ölümünün moleküler mekanizmasına ilişkin son gelişmeleri derleyebilmektir.

Anahtar Kelimeler

• Programlı hücre ölümü, bitkiler, kaspazlar

Kaynakça

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