BİTKİLERDE BÖCEKLERE DAYANIKLILIK MEKANİZMALARI

Bitkilerde dayanıklılık oluşumu konukçu ile patojenin bir araya gelmesi neticesinde tetiklenenbiyokimyasal tepkimeler sonucu ortaya çıkmakta ve bu olayların salisilik asit ve buna bağlı proteinlerinifadesiyle kendini gösterdiği bilinmektedir. Böceklerde dayanıklılığın böceğin bulunduğu konukçudankaynaklanan belirli özelliklerle ortaya çıkan antibiosis ve tercih edilmeme durumlarına ilaveten zararlı ilebitki arasındaki bir takım interaksiyonlar sonucu sinyal iletişimlerinin olması ve bu sinyal iletişimlerininjasmonik asit ve benzeri komponentlerle iki unsur arasında taşınabilmesi dayanıklılığın oluşumundatetikleyici faktördür. Dayanıklılıkta patojen-konukçu ve zararlı- konukçu arasında iletişimin farklıolmasıyla sinyal iletişiminin de farklı olduğu ve hatta sinyal ileticiler arasında bir çapraz antagonizm(cross-talk) olduğu bilinmektedir. Bu veriler ışığında derleme okuyucuya bitkilerde böceklere karşıoluşturan dayanıklılık konusunda özetleyici güncel bilgiler vermektedir.

HOST PLANT RESISTANCE-MECHANISMS TO INSECTS

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.
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