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Bitki Tuz Stresi Toleransında Salisilik Asit ve Poliaminler

Authors: Yıldız, Mustafa; Terzi, Hakan; Akçalı, Nermin;

Bitki Tuz Stresi Toleransında Salisilik Asit ve Poliaminler

Abstract

Tuzluluk dünya genelinde ürün kaybına neden olan önemli faktörlerden biridir. Tarımsal açıdan önemli bitkilerde ürün potansiyelinin yaklaşık yarısının tuzluluktan dolayı kaybedildiği tahmin edilmektedir. Bu nedenle, artan nüfusun besin ihtiyacının karşılanması için tuzluluğa toleranslı tarımsal bitkiler geliştirilmelidir. Geleneksel ıslah veya modern moleküler biyoloji yaklaşımları tuz stresi altında bitki büyüme ve üretkenliğini en iyi duruma getirmek için uygulanmaktadır. Buna rağmen, tuz toleransı bakımından tarımsal bitkilerin ıslahı karmaşıklık ve kalıtsal zorluklardan dolayı sınırlanmaktadır. Alternatif bir diğer yaklaşım ise başlıca bitki büyüme düzenleyicilerinin dışsal uygulanması ile tuz toleransının arttırılmasıdır. Bitki büyüme düzenleyicilerinin kuraklık, ağır metal, tuzluluk, düşük ve yüksek sıcaklık gibi streslere karşı toleransı arttırdığı kanıtlanmıştır. Bitki büyüme düzenleyicileri arasında yer alan salisilik asit (SA) ve poliaminler (PA’lar) kapsamlı şekilde çalışılmıştır. Hem SA hem de PA’ler tuz stresi altında bitki büyüme ve gelişimini etkileyen çeşitli fizyolojik rollere sahiptir. Bu derlemede, SA ve PA’lerin biyosentetik yolları ve fizyolojik etkileri tanımlanmıştır. Ayrıca, tuz stresine maruz bırakılan bitkilerde dışsal SA ve PA uygulamalarının etkisi tartışılmıştır.

Salinity is one of the major factors that cause crop loss worldwide. It has been estimated that about half of the yield potential of major crops are lost due to salinity. Therefore, crops with tolerance to salinity should be developed to feed the increasing world population. The conventional breeding or modern molecular biology strategies have been employed to maximize plant growth and productivity under salinity stress. However, breeding of crops for salt tolerance is limited due to its own complexities and hereditary difficulties. An alternative approach is to enhance salt tolerance through exogenous application of certain plant growth regulators. Plant growth regulators have proven to increase stress tolerance of plants such as to drought, heavy metals, salinity, low and high temperature stresses. Among these plant growth regulators salicylic acid (SA) and polyamines (PAs) have been studied most extensively. Both SA and PAs play diverse physiological roles, which are affecting plant growth and development under salinity stress. In the present review, we have described the biosynthetic pathways and physiological roles of SA and PAs. Moreover, the effects of exogenous applications of SA and PAs on the plants exposed to salinity stress have also been discussed.

Country
Turkey
Keywords

Tuz Toleransı, Poliaminler, Salisilik Asit

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Green