Effects of foliar applied gibberellic acid and benzyladenine upon yield components in sunflower (Helianthus annuus L.)

Beltrano, José; Caldiz, Daniel O.; Barreyro, Roberto Abel; Vallduví, Griselda Sánchez; Bezus, Rodolfo

doi:10.1007/bf00024097

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…Although growth stages did not respond significantly to MC applications, the seed filling percentage was higher in the V4 growth stage. The increase in the amount of photoassimilates from outside of the sunflower head inwards via different PGR applications, as seen in previous studies (Beltrano et al, 1994), may cause a decrease in the percentage of empty achenes in the middle of the sunflower. This photoassimilate partitioning can increase the number of filled achenes.…”

Section: Resultssupporting

confidence: 59%

Effects of mepiquat chloride applications on non-oilseed sunflower

Polat¹,

Özer²,

Öztürk³

et al. 2017

Turk J Agric For

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Introduction Turkey is one of the few countries in the world that is largely self-sufficient in terms of food. The country's fertile soil, access to sufficient water, suitable climate, and hardworking farmers all make for a successful agricultural sector. In addition, a broad range of crops can be raised because of the variety of different climates throughout the land. This has allowed Turkey to become the largest producer and exporter of agricultural products in the Near East and North African regions (Açar et al., 2016; Bozokalfa et al., 2016; İpek et al., 2016). However, despite all efforts to increase oilseed crop production, Turkey continues to be import-dependent for oilseeds and products. Sunflower is the most important oilseed crop of Turkey, with the production of approximately 650,000 ha annually (http://www.fao.org/faostat/en/). Most of the sunflower production areas in Turkey are devoted to oilseed sunflower types, and non-oilseed sunflower production is estimated to be practiced on about 100,000 ha, which corresponds to roughly one-sixth of the total harvested area. Eastern Anatolia is the largest geographical region of Turkey, where non-oilseed sunflower acreage accounts for approximately 90% of the total harvested area (http://www. fao.org/faostat/en/). Sunflower is mainly grown for two principal marketing objectives: oilseed and non-oilseed (confectionery). Non-oilseed sunflower production, although a small, specialized market in comparison with oilseed sunflower, is nevertheless constantly growing in size and importance due to the increasing demand for sunflower seeds in the health-food, confectionary, and snack trades. Plant growth regulators (PGRs) are natural or synthetic organic compounds that control or modify one or more physiological events in plants. These synthetic compounds are widely used in plants, especially in cereals, in reducing plant height. The most commonly used and known PGR group is the gibberellins. Gibberellins affect many physiological functions in plants. They are essentially responsible for controlling cell elongation and shoot and stem growth (Spitzer et al., 2011). When gibberellins are applied to plants, internodes become shorter and leaves become thicker and greener, increasing both drought resistance and net photosynthesis (Arteca, 1995). Mepiquat chloride (MC), which is a gibberellin acid

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Section: Resultssupporting

confidence: 59%

Effects of mepiquat chloride applications on non-oilseed sunflower

Polat¹,

Özer²,

Öztürk³

et al. 2017

Turk J Agric For

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“…Conditions in Sunflower (Helianthus annuus L.)" araştırıcılar tarafından bildirilmiştir (Nowak et al 1988;Beltrano et al 1994;Cecconi et al 2002;Rahman et al 2004). Almeida et al (1996) Baydar (2000) aspirde yağ oranının artan GA 3 dozuyla azaldığını bildirmelerine rağmen, Bibi et al (2003) ayçiçeğine uygulanan 10-30 ppm aralığındaki GA 3 dozunun yağ oranını arttırdığını tespit etmiştir.…”

Section: Erdemli and Kaya "The Effects Of Gibberellic Acid Doses On Yunclassified

“…En kısa bitki boyu 103.5 cm ile kontrol uygulamasından elde edilmiş, artan GA 3 dozlarıyla bitki boyu artmış ve en uzun bitki 121.9 cm ile 400 ppm dozunda belirlenmiştir. Giberellik asidin bitki boyunu uzatmada etkili olduğu, cüce bitkilerde bile bitki boyunun GA 3 uygulamasıyla arttırılabileceği çeşitli araştırıcılar tarafından bildirilmiştir (Nowak et al 1988;Beltrano et al 1994;Cecconi et al 2002;Rahman et al 2004). Almeida et al (1996) Beltrano et al (1994) ayçiçeğinde 150 mg/L, Rahman et al (2004) soyada 100 ppm GA 3 'in bin tane ağırlığının artışını sağladığını bildirmişlerdir.…”

Section: Bulgular Ve Tartışmaunclassified

Ayçiçeği (Helianthus annuus L.)'nde Giberellik Asit Dozlarının Verim ve Abiyotik Stres Koşullarında Çimlenme Üzerine Etkileri

Erdemli¹,

Kaya²

2015

Tarla Bitkileri Merkez Araştırma Enstitüsü Dergisi

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ÖzBu araştırma, Eskişehir koşullarında farklı giberellik asit (GA 3 ) dozları uygulanan ayçiçeğinde verim ve verim öğeleri ile tohuma uygulanan GA 3 dozlarının abiyotik stres koşullarında çimlenme üzerine etkilerini belirlemek amacıyla yürütülmüştür. Çalışmada materyal olarak Sanbro MR ayçiçeği çeşidi ile GA 3 kullanılmıştır. 2013 yılında yürütülen tarla denemelerinde kontrol (saf su), 50, 100, 200, 300 ve 400 ppm GA 3 dozları bitkiler 6-8 yapraklı (V 6 -V 8 ) olduğu dönemde uygulanarak verim ve verim öğeleri incelenmiştir. Çimlendirme denemelerinde, aynı dozlarda GA 3 ayçiçeği tohumlarına 8 ve 16 saat süreyle uygulanarak tuz ve kuraklık stresinde çimlenme performansları incelenmiştir. Araştırma sonuçlarına göre, artan GA 3 dozları çiçeklenme süresinin 2 gün kısalmasını sağlamıştır. Bitki boyu ve bin tane ağırlığı GA 3 dozları ile artmasına rağmen, çiçeklenme süresi, tabla çapı, bitkide tane verimi, yağ oranı, yağ verimi ve klorofil içeriği azalmıştır. Laboratuvar denemelerinde ise özellikle düşük dozlarda uygulanan GA 3 dozları tuz ve kuraklık stresinde etkili olmuştur. Tohuma 8 saat süreyle uygulanacak 50 ppm GA 3 dozunun tuz stresinin çimlenme üzerine etkisini azaltmak bakımından yararlı olabileceği sonucuna varılmıştır. AbstractThis study was carried out to determinate the effects of different gibberellic acid doses on sunflower yield, yield components in Eskişehir conditions and to detect the GA 3 doses on seed germination under abiotic stress conditions. Field and laboratory experiments were performed in 2013 using Sanbro MR and gibberellic acid as materials in this study. Yield and yield components of sunflower were investigated after gibberellic acid doses of control (distilled water), 50, 100, 200, 300, 400 ppm were pulverized to the plants with growing stage of 6-8 leaves (V 6 -V 8 ). Salinity and drought stresses were performed by using the same doses of GA 3 applied to the seeds both for 8 and 16 h. According to the research results, although plant height and one thousand seed weight enhanced by increasing GA 3 doses, blooming time, head diameter, seed yield per plant, oil content, oil yield, chlorophyll content decreased. Increasing GA 3 doses shortened two days of blooming time. In laboratory experiment, especially lower doses of GA 3 were effective for salt and drought stresses. It was concluded that seed treatment with 50 ppm dose of GA 3 for 8 h can be beneficial for decreasing the effect of abiotic stress conditions on germination.

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“…Alkio and Grimm (2003) showed that empty achenes are both structurally and functionally connected with receptacle tissue. However, empty achenes in the central whorls have been suggested to be due to constraints in the supply of water and assimilates or lack of space towards the center of receptacle tissue for the expansion of florets and developing seeds (Bettrano et al, 1994). A hollow space was seen in the center of the capitulum when a vertical cut was made from the top down through the stem.…”

Section: Resultsmentioning

confidence: 98%

Physical characteristics and biochemical composition of seeds influenced by their position in different whorls of sunflower head-effect of storage

Gupta

Sharma

Munshi

2009

Helia

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The effect of storage on biochemical composition of seeds located in different whorls of sunflower head at maturity has been studied. The proportion of filled seeds, yield parameters such as weight of seeds, kernels and oil per whorl and dry weight of seeds and kernels decreased from the peripheral towards the central whorls. Dry matter, oil and starch contents decreased after 180 days of storage at room temperature. The content of total soluble sugars increased while that of reducing sugars decreased in peripheral whorls from first to ninth positions during storage for 180 days. The storage of seeds located in central whorls lowered the proportion of oleic acid with a corresponding increase in linoleic acid after 180 days. Thus, the seeds located in peripheral whorls were more productive and better for storage purposes than those in central whorls.

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Effects of foliar applied gibberellic acid and benzyladenine upon yield components in sunflower (Helianthus annuus L.)

Cited by 5 publications

References 11 publications

Effects of mepiquat chloride applications on non-oilseed sunflower

Effects of mepiquat chloride applications on non-oilseed sunflower

Ayçiçeği (Helianthus annuus L.)'nde Giberellik Asit Dozlarının Verim ve Abiyotik Stres Koşullarında Çimlenme Üzerine Etkileri

Physical characteristics and biochemical composition of seeds influenced by their position in different whorls of sunflower head-effect of storage

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