HOST PLANT RESISTANCE-MECHANISMS TO INSECTS

Yıl 2007, Cilt: 24 Sayı: 1, 19 - 31, 01.03.2007

Mehmet Keçeci , Ömür Baysal Mustafa Soysal İlyas Tekşam

Öz

Resistance formation is evoked by the host and plant pathogen when they do concominantly present at the same place, trigering biochemical pathways and showing itself with precursor of salicylic acid synthesis and expression of its binding proteins in planta. Whereas this case shows some differences in interaction, realizing between pest and host. In addition some interactions occuring between pest and host result in signal transduction, jasmonic acid-like compounds are the main factors conferring transduction of signal between two channels therefore, some cases sourcing some properties of host leads to antibiosis, antixenosis that are trigerring factors for forming resistance. It is known that an antagonism (cross-talk) which is between signal transporters and with differantiation in signal transduction occurring between pathogen –host and pest – host changes signal communication in resistance as well. This review gives some updated and summarised information on pest-resistance to reader in the shed of these mentioned knowledge.

Anahtar Kelimeler

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BİTKİLERDE BÖCEKLERE DAYANIKLILIK MEKANİZMALARI

Öz

Bitkilerde dayanıklılık oluşumu konukçu ile patojenin bir araya gelmesi neticesinde tetiklenen
biyokimyasal tepkimeler sonucu ortaya çıkmakta ve bu olayların salisilik asit ve buna bağlı proteinlerin
ifadesiyle kendini gösterdiği bilinmektedir. Böceklerde dayanıklılığın böceğin bulunduğu konukçudan
kaynaklanan belirli özelliklerle ortaya çıkan antibiosis ve tercih edilmeme durumlarına ilaveten zararlı ile
bitki arasındaki bir takım interaksiyonlar sonucu sinyal iletişimlerinin olması ve bu sinyal iletişimlerinin
jasmonik asit ve benzeri komponentlerle iki unsur arasında taşınabilmesi dayanıklılığın oluşumunda
tetikleyici faktördür. Dayanıklılıkta patojen-konukçu ve zararlı- konukçu arasında iletişimin farklı
olmasıyla sinyal iletişiminin de farklı olduğu ve hatta sinyal ileticiler arasında bir çapraz antagonizm
(cross-talk) olduğu bilinmektedir. Bu veriler ışığında derleme okuyucuya bitkilerde böceklere karşı
oluşturan dayanıklılık konusunda özetleyici güncel bilgiler vermektedir.

Anahtar Kelimeler

Dayanıklılık, böcek, interaksiyon, uyarıcı

Kaynakça

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