Strigolactones; New Member of Plant Hormones Class

Year 2021, Issue: 27, 735 - 746, 30.11.2021

Semra Arıkan Şengül Karaman

https://doi.org/10.31590/ejosat.947571

Abstract

Strigolactones (SL) have been investigated for many years due to their activation of seed germination of parasitic plants such as Striga (witch grass), Orobanche (broomrapes) and their positive effect on branching in arbuscular mycorrhizal fungi. It was included in the herbal hormones class in 2008 due to its effect on regulating the necessary response to various biotic and abiotic stresses such as lack of nutrients in the soil, especially phosphate, drought, salinity, temperature, light and pathogens, and the physiological functions of the plant in adapting to stress. Strigolactones, a carotenoid derivative, play an active role in inhibiting shoot branching against stress, stimulating various plant development stages such as seed germination, root architecture, and optimizing plant growth and development. In this article, the structure of strigolactones, their biosynthesis, physiological responses to stress and their interaction with other plant hormones and plant growth regulators are summarized.

Keywords

Strigolactone, Arbuscular Mycorrhizal Fungus, Parasitic weed, Plant hormones, Stress

Strigolaktonlar; Bitkisel Hormonlar Sınıfının Yeni Üyesi

Abstract

Strigolaktonlar (SL) Striga (cadı otu), Orobanche (canavar otu) gibi parazit bitkilerin tohum çimlenmesini aktive etmeleri ve arbusküler mikorizal mantarlarda dallanmaya pozitif etkilerinden dolayı uzun yıllardır araştırılmaktadır. Özellikle fosfat olmak üzere topraktaki besin eksikliği, kuraklık, tuzluluk, sıcaklık, ışık ve patojenler gibi çeşitli biyotik ve abiyotik stresler karşısında gerekli cevabın düzenlemesindeki etkisi ve bitkinin strese uyum sağlamasındaki fizyolojik görevlerinden dolayı 2008 yılında bitkisel hormonlar sınıfına dahil edilmiştir. Karotenoid türevi olan strigolaktonlar, stres karşısında sürgün dallanmasını inhibe etmede, tohum çimlenmesi, kök mimarisi gibi çeşitli bitki gelişim aşamalarını uyarmada, bitki büyümesini ve gelişimini optimize etmede aktif rol alırlar. Bu makalede strigolaktonların yapısı, biyosentezi, stres karşısında fizyolojik cevapları ve diğer bitkisel hormonlar ve bitki büyüme düzenleyicileri ile etkileşimi özetlenmiştir.

Keywords

Strigolakton, Arbusküler, Mikorizal Mantar, Parazitik bitki, Bitkisel hormonlar, Stres

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