TAILIEUCHUNG - Defoliation effects on sunflower (Helianthus annuus L.) seed yield and oil quality

The objective of the present study was to determine the influence of artificial defoliation on sunflower seed yield, oil content, and fatty acid composition. The research was carried out at Süleyman Demirel University, Isparta, Turkey, during 2002 and 2003. | Turk J Biol 31 (2007) 115-118 © TÜB‹TAK Defoliation Effects on Sunflower (Helianthus annuus L.) Seed Yield and Oil Quality Sabri ERBAfi, Hasan BAYDAR Department of Field Crops, Faculty of Agriculture, Süleyman Demirel University, 32260 Isparta - TURKEY Received: Abstract: The objective of the present study was to determine the influence of artificial defoliation on sunflower seed yield, oil content, and fatty acid composition. The research was carried out at Süleyman Demirel University, Isparta, Turkey, during 2002 and 2003. Six defoliation levels [0 (control), 5, 10, 15, 20 and 25 leaves per plant] were applied at the preflowering stage from bottom to top leaves. The results demonstrate a close relationship between yield reduction and the defoliation levels. The higher the defoliation level, the higher the yield reduction. Complete and partial leaf removal treatments reduced oil percentage of seed when compared with the undefoliated check. However, oleic acid and linoleic acid levels in seed were not significantly affected by defoliation treatments. Key Words: Helianthus annuus L., leaf defoliation, yield, oil, fatty acids Ayçiçe¤i (Helianthus annuus L.) Tohum Verimi ve Ya¤ Kalitesi Üzerine Yaprak K›r›m›n›n Etkisi Özet: 2002 ve 2003 y›llar›nda Türkiye’de Süleyman Demirel Üniversitesi’nde yap›lan bu araflt›rmada, yaprak k›r›m›n›n ayçiçe¤i tohum verimi, ya¤ içeri¤i ve ya¤ asitleri kompozisyonu üzerine etkisi araflt›r›lm›flt›r. Ayçiçe¤i bitkilerinde çiçeklenme öncesinde alt yapraklardan üst yapraklara do¤ru 0 (kontrol), 5, 10, 15, 20 ve 25 adet olmak üzere alt› farkl› seviyede yaprak k›r›m› yap›lm›flt›r. Ayçiçe¤inde yaprak k›r›m› seviyeleri ile verim azalmas› aras›nda yak›n bir iliflki bulundu¤u görülmüfltür. Yaprak k›r›m seviyesi artt›kça, verim düflüfl oran› da art›fl göstermifltir. Her iki deneme y›l›nda da, tam ve k›smi yaprak uzaklaflt›rma uygulamalar›nda kontrol bitkilere göre ya¤ oran› düflmüfltür. Tohum ya¤›nda oleik ve linoleik asit oranlar› .

• Sinh học
• Helianthus annuus L
• Leaf defoliation
• Fatty acids
• Sunflower seed yield
• Oil conten
• Sunflower (Helianthus annuus L )
• Hybrid KBSH 53
• Seed priming on biochemical changes
• Aged seeds of sunflower
• Sodium azide
• Confectionary sunflower (Helianthus annuus L )
• Yield contributing traits
• Sodium azide in yield
• Heterosis studies
• Heterosis studies in sunflower
• Sunflower (Helianthus annuus L
• Helianthus annuus
• Components in sunflower
• Báo cáo khóa luận tốt nghiệp
• Báo cáo tốt nghiệp ngành Nông học
• Phân bón lá
• Cây hoa hướng dương
• Giống hoa hướng dương
• Sunflower Helianthus annuus L
• Seed yield
• Genotypic variation
• Oilseed sunflower hybrids
• Sunflower genotypes grown
• Seed development and position
• Sunflower seeds obtained
• Excellent oil quality
• Crop water stress index
• Total irrigation water
• Infrared thermometer
• Furrow irrigation
• Seed quality
• Seed storage
• Seed invigoration
• SSunflower (Helianthus annuus L
• Various storage duration
• Inbred lines
• Stay green
• CMS sources
• Texas 16 R
• Drought conditions (Helianthus annuus L
• Fertility restoration
• Studies on fertility restoration
• Newly derived restorers
• Single cytoplasm
• Cytoplasmic diversity
• Male sterility
• Cytoplasmic diversity studies
• Production in sunflower
• Trichomes size in sunflower
• Structure in sunflower
• Nitrogen deficiency
• Nitrogen metabolism and phytohormones associated
• New CMS
• Maintainer and restorer identification
• Restorer identification
• Good combiner inbreds into new CMS lines
• New CMS lines
• Restoration ability
• New inbred and restorer lines
• Different CMS sources
• CMS sources in sunflower
• Nutrient uptake
• Nutrient uptake of sunflower
• Different levels of boron
• Potassium in sandy loam soil
• Sandy loam soil
• Micronutrient mixture
• Foliar application
• Micronutrient mixture foliar application
• Quality parameters and economics
• Priming on physiological seed quality
• Physiological seed quality in fresh
• High oleic acid
• Gas Chromatography
• SSR marker
• High oleic acid content
• Humic acid
• Quality parameters and yield
• Quality parameters
• Yield of rainfed sunflower
• Rainfed sunflower (Helianthus annuus L )
• Integrated nutrient management
• Antioxidative enzymes
• Two different cultivars
• NaCl induced oxidative stress
• NSSH 1084 compared to SWATI cultivar
• Pollen storage
• Pollination studies
• Maximization of hybrid seed production
• Hybrid seed production
• Index score
• Oleic acid
• Morphological variation
• Meteroglyph analysis
• Nano boron nitride
• Seed priming
• Nano boron nitride increases
• Performance of sunflower
• G × E interaction
• Component traits in sunflower
• Stability analysis