POLYETHYLENE GLYCOL 6000 uygulanmış Upland Pamuk (Gossypium hirsutum L.) pamuk çeşitlerinin çimlenme döneminde kuraklık stresine reaksiyonları

Öz

Pamuk, tekstil endüstrisinde kullanılan doğal liflerin ve yağın en önemli kaynağıdır. Pamuk, yaklaşık 50 endüstri dalı için hammadde sağlamakta; dünya çapında yaklaşık 200 milyon insanın geçim kaynağını oluşturmaktadır. Pamuk üretimini sınırlayan yaklaşık 20 tane biyotik ve abiyotik stres faktörü bulunmaktadır. Kuraklık, tüm pamuk yetiştirilen alanlarda en yıkıcı abiyotik streslerden birisidir. Kuraklık, doğrudan veya dolaylı olarak tüm dünyayı olumsuz etkileyen bir abiyotik stres faktörü olduğundan, kuraklıkla mücadele etmek için çok yönlü bir yaklaşım gerekmektedir. Bu deneme, 2023 yılı Mayıs ayında Bingöl Üniversitesi Genç Meslek Yüksekokulu Tarımsal Biyoteknolojisi laboratuvarında yürütülmüştür. Araştırmanın amacı, on farklı kara pamuk çeşidinin, PEG6000 kimyasalı kullanılarak oluşturulan 0 MPa (kontrol), -0.4 MPa, -0.6 MPa, -0.8 MPa ve -1 MPa osmotik basınç streslerine maruz bırakılarak kuraklık koşullarına karşı reaksiyonları araştırmaktır. Çeşitlerin çimlenme yüzdesi (GP, %) ölçülmüştür. Sonuç olarak, May 344 ve May 455 çeşitleri, diğer çeşitlere kıyasla Osmotik Stres'e karşı önemli derecede üstün tolerans sergilemektedirler. Beren ve SG-125 de nispeten olumlu tolerans seviyeleri göstermektedir. Sürekli yüksek çimlenme yüzdeleri (GP) gösteren çeşitler, çimlenme ve sürme potansiyellerini değerlendirmek için kontrolsüz arazi koşullarında ekilmelidir. Hızlı çimlenme oranı sergileyen çeşitlerde pamukta erkencilik özellikleriyle ilişkilendirilen genler olabilir.

Anahtar Kelimeler

• Kuralık,
• Pamuk
• PEG6000
• tolerant
• Çimlenme

Screening the Polyethylene Glycol 6000 Induced Upland Cotton (Gossypium hirsutum L.) Cultivars Drought Response at The Germination Stage

Öz

Cotton is the most important source of natural fiber used in the textile industry and oil. Cotton provides raw materials for approximately 50 industry branches; it is a source of livelihood for about 200 million people worldwide. There are about 20 biotic and abiotic stress factors that limit the production of cotton. Drought is one of the most destructive abiotic stresses in all cotton-growing areas. Since drought is an abiotic stress factor that directly or indirectly affects the entire world negatively, a multifaceted approach is necessary to combat drought. This experiment was conducted in the University of Bingol, Genç Vocational School, Agriculture Biotechnology laboratory, in May 2023 year. The objective of the research was to explore upland cotton cultivar’s reaction to drought conditions induced by osmotic pressure stresses of 0 MPa (control), -4 MPa, -6 MPa, -8 MPa, and -10 MPa using PEG6000 chemical on Ten upland cotton cultivars. Germination percentage (GP, %) of cultivars was measured. In conclusion, In summary, May 344 and May 455 cultivars display notably superior tolerance to Osmotic Stress in contrast to other varieties, with Beren and SG-125 also showing relatively favorable tolerance levels. These discoveries offer valuable perspectives into the germination characteristics of these cultivars across diverse osmotic environments. Cultivars exhibiting consistently high germination percentages (GP) should be sown in uncontrolled field conditions to evaluate their germination and emergence potential. Moreover, cultivars demonstrating a fast germination rate and emergence may have genes associated with the earliness traits in cotton.

Anahtar Kelimeler

• Drought
• cotton
• PEG6000
• Germination
• tolerance

Kaynakça

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