Seed priming with mepiquat chloride and foliar applications of salicylic acid and proline improve the adverse effects of water deficit in cotton (Gossypium hirsutum L.)

Abstract

We aimed to investigate the effects of some seed priming and foliar applications on stress prevention in cotton under deficit irrigation conditions. Seed priming with mepiquat chloride (PIX) and foliar applications of salicylic acid (SA) and proline (PRO) were tested at three levels of irrigation at 25, 50, and 100% of field capacity. Plant height, boll number, fiber length and fiber strength were significantly affected by the interaction of irrigation level × treatment. The effects of irrigation level and treatment were significant for boll weight, seed index, seed cotton yield and lint yield. When deficit irrigation conditions (25%) were compared with full irrigation, plant height decreased by 21.6 %, boll number by 18.1 %, boll weight by 26.0%, seed index by 5.8%, seed cotton yield by 25.6% and lint yield by 24.6%. Seed priming with PIX and foliar application of PRO produced significantly higher seed cotton and lint yields, whereas SA application had favourable fiber quality parameters under deficit irrigation conditions. PRO slightly increased fiber fineness. Foliar application of SA positively affected chlorophyll content (SPAD) and leaf area index (LAI) under deficit irrigation. In conclusion, it was recommended that all three practices could be successfully used to alleviate negative impacts under deficit irrigation conditions.

Keywords

• Mepiquat chloride
• Proline
• Salicylic acid
• Deficit irrigation
• Foliar application
• Seed priming

Mepiquat chloride ile tohum ön uygulaması, salisilik asit ve prolinin yaprak uygulamaları pamukta (Gossypium hirsutum L.) kısıntılı sulamanın olumsuz etkilerini iyileştirir

Öz

Pamukta su kısıntısı koşullarında bazı tohum ön uygulaması ve yaprak uygulamalarının stresi önleme üzerine etkilerinin araştırılması amaçlanmıştır. Mepiquat klorid (PİX) ile tohum ön uygulaması ve salisilik asit (SA) ile prolinin (PRO) yaprak uygulamaları tarla kapasitesine göre düzenlenen %100, %50 ve %25 sulama konularında test edildi. Bitki boyu, koza sayısı, lif uzunluğu ve lif dayanıklılığı özellikleri sulama seviyesi × uygulama etkileşiminden önemli ölçüde etkilenmiştir. Koza ağırlığı, tohum indeksi, kütlü pamuk verimi ve lif verimi için sulama düzeyi ve uygulamanın etkileri önemliydi. Kısıntılı sulama koşulları (%25) tam sulama ile karşılaştırıldığında, bitki boyu %21,6, koza sayısı %18,1, koza ağırlığı %26,0, tohum indeksi %5,8, kütlü pamuk verimi %25,6 ve lif verimi %24,6 oranında azalmıştır. PİX ile tohum ön uygulama ve PRO'nun yapraktan uygulanması önemli ölçüde daha yüksek kütlü pamuk ve lif verimi sağlarken, SA uygulaması kısıntılı sulama koşulları altında yüksek lif kalitesi parametrelerine sahip olmuştur. PRO'nun lif inceliğini az da olsa artırdığı tespit edilmiştir. SA’nın yapraktan uygulanması, kısıntılı sulama koşullarında klorofil içeriğini (SPAD) ve yaprak alan indeksini (LAI) olumlu yönde etkilemiştir. Sonuç olarak, her üç uygulamanın da kısıntılı sulama koşullarında olumsuz etkileri hafifletmek için başarıyla kullanılabileceği önerilmiştir.

Anahtar Kelimeler

• Mepiquat chloride
• Prolin
• Salisilik asit
• Kısıntılı sulama
• Tohum ön uygulaması
• Yaprak uygulaması

Kaynakça

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