Assessing the mechanisms underlying sunflower grain weight and oil content responses to temperature during grain filling

Angeloni, Patricia; Aguirrezábal, Luis; Echarte, Marı́a Mercedes

doi:10.1016/j.fcr.2020.108040

Cited by 12 publications

(5 citation statements)

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“…Prevailing temperature during seed development has a key influence on sunflower oil characteristics [ 57 ], mainly as a result of synthesis or activation of oleate desaturase at low temperature and its reversible inhibition at elevated temperature [ 58 , 59 ]. Irrigation may influence the temperature of the vegetative apparatus and the canopy micro-climate [ 60 ], increased evapotranspiration cooling of plant tissues after irrigation might have resulted in increased activity of oleate desaturase, causing a lower oleic/linoleic acid ratio [ 58 ].…”

Section: Discussionmentioning

confidence: 99%

Potassium fertilization improves growth, yield and seed quality of sunflower (Helianthus annuus L.) under drought stress at different growth stages

et al. 2021

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Water scarcity is a major concern for sunflower production in the semi-arid and arid regions of the world. Potassium (K) application has been found effective to alleviate the influence of drought stress; however, the impact of drought stress on seed quality of sunflower has not been reported frequently. Therefore, a field experiment was performed to determine the optimum K requirement for mitigating the adverse effects of water stress and improving growth and seed quality of spring-planted sunflower. Sunflower plants were exposed to water stress at different growth stages, i.e., Io = no stress (normal irrigation), I1 = pre-anthesisi stress (irrigation skipped at pre-anthesis stage), I2 = anthesis stress (irrigation skipped at anthesis stage) and I3 = post-anthesis stress (irrigation skipped at post-anthesis stage). Potassium was applied at four different rates, i.e., Ko = 0, K1 = 50, K2 = 100 and K3 = 150 kg ha-1. The results revealed that water stress at pre- and post-anthesis stages significantly reduced plant height, head diameter, number of achenes, oleic acid contents, and phosphorus (P) uptake. However, pre-anthesis stress improved linoleic acid contents. Treatment IoK3 (stress-free with 150 kg ha-1 K) was optimum combination for 1000-achene weight, biological and achene yields, oil contents, protein contents, and N and P uptake. Results indicated that a higher amount of K and irrigation resulted in higher yield, whereas yield and yield components decreased with early-stage water stress. Nevertheless, potassium application lowered the impacts of waters stress compared to no application. Keeping in view these results, it is recommended that sunflower must be supplied 150 kg ha-1 K in arid and semi-arid regions to achieve higher yield and better seed quality.

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Section: Discussionmentioning

confidence: 99%

Potassium fertilization improves growth, yield and seed quality of sunflower (Helianthus annuus L.) under drought stress at different growth stages

et al. 2021

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“…In fact, this specific phenological phase is considered to be very susceptible to any environmental limitation, which can determine significant negative effects on the quantitative and qualitative seed yield, as already reported for other crops (e.g., [34]). This would also explain the significant increase of seed oil content obtained with a delayed sowing time, confirming that high temperatures after flowering have a detrimental effect on seed oil accumulation, as already observed in hemp [25,46] and as well-known about other crops [47,48], including sunflower, in which seed oil percentage is dramatically reduced by temperatures higher than >35 • C due to an increase in the pericarp-to-embryo ratio and a reduction of embryo oil content [33,49].…”

Section: Discussionsupporting

confidence: 73%

Performance and Stability of Different Monoecious Hemp Cultivars in a Multi-Environments Trial in North-Eastern Italy

et al. 2021

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The seed yield in hemp (Cannabis sativa L.) is strongly influenced, besides by genotype, by environment and the genotype x environment interaction, so establishing the fitness and stability of hemp cultivars in multiple environments is necessary. The purpose of this study was to investigate the performance and degree of stability and variance of seed yield, the main related traits, and the correlation among the traits in five hemp monoecious cultivars cultivated in six different environments. The environments resulted from the combination of four locations, two years, and two delayed sowings in a Mediterranean area of north-eastern Italy, and the stability index of the weighted average of absolute scores (WAAS) was used in order to identify the most productive and stable genotypes on the basis of their deviation from the average performance across environments. In this studied area, early varieties, such as Fedora and Felina, proved to be the best performing and stable for seed yield and both increased their yield in correspondence to delayed sowing times, opening up the possibility of cultivating hemp as a second crop. Among the climate parameters, high temperatures during the early grain filling period led to a progressive decrease in seed yield. For a dual-purpose crop, a good compromise could be a late monoecious cultivar (like Futura, in the present experiment), which, if sown early, could certainly provide notable biomass production and acceptable seed yield.

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“…Radić et al (2013), Calamai et al (2018) and Krstić et al (2021a) argue that there are statistically highly significant differences between the sunflower genotypes relative to their weight of 1000 seeds. Incomplete or inadequate fertilization (Miklič et al, 2011), diseases (Kaya & Day, 2008) and unfavorable weather conditions during grain filling (Angeloni et al, 2021) can greatly affect the seed size and/or 1000-seed weight of sunflowers. There are also statistically highly significant differences between the sunflower genotypes relative to their head diameters (Ćirić et al, 2013;Babec et al, 2020;Dar et al, 2021).…”

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confidence: 99%

Agro-Morphological Traits of Inbred Sunflower Lines and their Genetic Assessment

Krstić

Mladenov

Ćuk

et al. 2022

Contemporary Agriculture

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Summary As plant breeding is a very complex and sophisticated process, it is of paramount importance to understand the nature and magnitude of interdependence between specific plant features. Using PCA and correlation analysis, this study examined the variability in features of two types of inbred sunflower lines and determined its connection with their seed yields. The experiment was conducted as a randomized complete block design with four replications in Rimski Šančevi (the experimental field of the Institute of Field and Vegetable Crops in Novi Sad) in 2018 and 2019. It examined a total of nine inbred sunflower lines created at the Institute of Field and Vegetable Crops in Novi Sad. The results obtained suggest a high degree of variability in the examined traits of inbred sunflower lines considered, whereas the significance indicated by the F test was confirmed by the Duncan test performed. A high degree of variability was also found between the different types of inbred lines considered. A positive correlation was found between all four traits observed in the inbred sunflower lines considered, with different levels of significance. A statistically significant positive increase in the head diameter was followed by an increase in the weight of 1000 seeds, which generated a higher seed yield per unit area. According to the arrangement of different types of inbred lines considered on the PCA biplot, it can be concluded that the linoleic inbred lines G7L and G8L had the highest average values of the 1000-seed weight, head diameter and seed yield throughout the course of both experimental years. The useful data obtained by PCA analysis can facilitate successful selection programs aimed at developing sunflower genotypes that possess high stability and seed yields.

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Assessing the mechanisms underlying sunflower grain weight and oil content responses to temperature during grain filling

Cited by 12 publications

References 36 publications

Potassium fertilization improves growth, yield and seed quality of sunflower (Helianthus annuus L.) under drought stress at different growth stages

Potassium fertilization improves growth, yield and seed quality of sunflower (Helianthus annuus L.) under drought stress at different growth stages

Performance and Stability of Different Monoecious Hemp Cultivars in a Multi-Environments Trial in North-Eastern Italy

Agro-Morphological Traits of Inbred Sunflower Lines and their Genetic Assessment

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