Effect of irrigation frequency and amount on water use efficiency and yield of sesame (Sesamum indicum L.) under field conditions

Uçan, Kenan; Kıllı, Fatih; Gençoğlan, Cafer; Merdun, Hasan

doi:10.1016/j.fcr.2006.11.011

Cited by 104 publications

(59 citation statements)

References 12 publications

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“…The application of PBZ has no harmful effects to human health and it has produced increased yield of crops. PBZ has been proven as an agent in stress amelioration in medicinal plants (Ucan et al, 2007). Paclobutrazol has been found to protect several crops from various environmental stresses including drought, chilling, heat and UV-B radiation (280-320 nm), although paclobutrazol-induced stress tolerance is reported to be due to increased antioxidant enzymes.…”

Section: A Investigacionesmentioning

confidence: 99%

Effect of paclobutrazol and salicylic acid on antioxidants enzyme activity in drought stress in wheat

Abbasi

Shekari

Mustafavi

2015

Idesia

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Volumen 33, Nº 4. Páginas 5-13 IDESIA (Chile) Septiembre-Noviembre, 2015 Effect of paclobutrazol and salicylic acid on antioxidants enzyme activity in drought stress in wheat ABSTRACTIn this study wheat plants were treated with paclobutrazol (PBZ) and salicylic acid (SA) to analyze the enzyme activity and chlorophyll content under two drought stresses (-6 and -12 bar). The Bahar cultivar was grown in a hydroponic system and drought stress was applied using PEG-6000 (-6 and -12 bar potential). Plants were kept under stress conditions for 10 days. Treatments with 5 mg L -1 paclobutrazol and 0.1 mm salicylic acid were carried out simultaneously with drought stress. The effects of PBZ and SA treatments on wheat were monitored by measuring the changes in CAT, APX, SOD, GPX, MDA, H 2 O 2 and chlorophyll under drought stress. Both PBZ and SA increased antioxidant enzyme activity and showed significant differences (p< 0.001 and 0.05). APX, SOD and CAT activity decreased under the drought condition but PBZ treatment resulted in increased APX activity in the drought stress treatment. However, seedlings supplemented under drought stress showed a profound increase in GPX activity (100% and 53% higher at -6 and -12 bar PEG on 3D) compared to stressed seedlings without SA spray. The results showed that paclobutrazol minimizes the negative effects of drought stress with evidence of enhancing chlorophyll content and antioxidant enzymes such as APX, CAT and GPX that reduces H 2 O 2 and lipid peroxidation (MDA) content.. Key words: paclobutrazol, salicylic acid, antioxidant enzyme, drought stress, wheat. RESUMENEn este estudio, las plantas de trigo fueron tratadas con paclobutrazol (PBZ) y ácido salicílico (SA) para analizar la actividad enzimática y el contenido de clorofila en dos tensiones de humedad (-6 y -12 bar). El trigo variedad Bahar se cultivó en un sistema hidropónico y se sometió a estrés hídrico mediante el uso de PEG-6000 (-6 y -12 bar potencial). Las plantas se mantuvieron bajo condiciones de estrés durante 10 días. Los tratamientos fueron la aplicación de 5 mg L -1 de paclobutrazol y 0,1 mm de ácido salicílico y se aplicaron simultáneamente con el estrés hídrico. Los efectos de los tratamientos de PBZ y SA en trigo fueron monitoreados por medio de la medición de los cambios en el CAT, APX, SOD, GPX, MDA, H 2 O 2 y clorofila en condiciones de sequía. En ambos tratamientos aumentó la actividad de la enzima antioxidante con diferencias significativas (p <0,001 y 0,05). La actividad de APX, SOD y CAT disminuyó bajo condiciones de sequía, pero el tratamiento PBZ aumentó la actividad de APX en el tratamiento de estrés por sequía. Las plantas del semillero bajo estrés hídrico aumentaron significativamente la actividad de GPX (100 y 53% más altos en -6 y -12bar PEG en 3D) respecto de las plantas del semillero estresadas sin SA. Los resultados sugieren que la aplicación de paclobutrazol minimiza los efectos negativos del estrés hídrico aumentando la concentración de clorofila y enzimas antioxidantes como APX, CAT y GPX...

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Section: A Investigacionesmentioning

confidence: 99%

Effect of paclobutrazol and salicylic acid on antioxidants enzyme activity in drought stress in wheat

Abbasi

Shekari

Mustafavi

2015

Idesia

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“…So it is believed that with irrigation, it is possible to get a significant increase in its yield (Uçan et al, 2007). Therefore, it is urgent to conduct researches on its water consumption to obtain full development of its crop and best water use efficiency (WUE).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, to achieve maximum yield and income profit per hectare, the available water should be used efficiently (Uçan et al, 2007). Traditionally, agricultural research has focused primarily on maximizing total production.…”

Section: Introductionmentioning

confidence: 99%

Behavior and water needs of sesame under different irrigation regimes: III. Production and hydric efficiency

Pereira¹,

Guerra²,

Zonta³

et al. 2017

Afr. J. Agric. Res.

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“…The climate during the growing season is dry (precipitation of less than 200 mm), creating a moist lower atmospheric boundary layer in an otherwise dry climate. Regional advection is expected to play a role in surfacelayer exchange processes (Lee et al 2004;Uçan et al 2007, Zhang et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Farmland microclimate and yield of winter wheat under different row spacing

Zhou

Sun²,

Yang³

et al. 2012

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To gain new insights into the underlying mechanisms responsible for farmland microclimate and yield of winter wheat under different row spacings [row spacing: 7 cm (RS7); 14 cm (RS14); 24.5 cm (RS24.5); 49 cm (RS49)], field experiments were conducted at Taian, China. Between the hours 13:00 and 14:00, low values of relative humidity (RH) and air temperature at 5 cm above the ground for the various row spacings were obtained. The average RH of RS7, RS14, RS24.5, and RS49 was 91.0%, 90.3%, 85.7%, and 76.4%, respectively; the average air temperature were 22.6°C, 23.2°C, 24.3°C and 25.3°C, respectively. The soil temperature of RS49 was higher than those of RS7 and RS14. The maximum values of eddy thermal diffusivity was 0.07 m 2 s -1 , as well as sensible and soil heat fluxes, were obtained at 12:00 o'clock. The order of these parameters was similar to that of the air temperature, but opposite to that of the latent heat flux. The yield of RS49 was significantly lower than those of the other treatments (P < 0.05). The present study indicates that excessive row spacing may result in severe dissipation of energy. RS14 is the optimum condition under uniform planting density. 2 akışının yanı sıra en yüksek termal difüzyon katsayısı 0.07 m 2 s -1 olup bu değer saat 12'de ölçülmüştür. Bu parametrelerin sıralaması hava sıcaklığı parametrelerinin sıralamasına benzer olmuş ancak gizli ısı akışı parametrelerinin sıralamasının tam tersi bir durum göstermiştir. Sıra arası 49 cm olduğu durumdaki uygulamanın diğerlerinden belirgin bir şekilde daha düşük olmuştur (P < 0.05). Araştırma sonuçlarına göre, sıra arası mesafesinin artması, enerji kaybında büyük kayıplara yol açtığını göstermiştir. Düzgün bir bitki dağılımı için en uygun koşullar açısndan sıra arası mesafenin 14 cm olduğu belirlenmiştir.

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Effect of irrigation frequency and amount on water use efficiency and yield of sesame (Sesamum indicum L.) under field conditions

Cited by 104 publications

References 12 publications

Effect of paclobutrazol and salicylic acid on antioxidants enzyme activity in drought stress in wheat

Effect of paclobutrazol and salicylic acid on antioxidants enzyme activity in drought stress in wheat

Behavior and water needs of sesame under different irrigation regimes: III. Production and hydric efficiency

Farmland microclimate and yield of winter wheat under different row spacing

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