Physiological response and productivity of safflower lines under water deficit and rehydration

Bortolheiro, Fernanda P. A. P.; Silva, Marcelo de Almeida

doi:10.1590/0001-3765201720170475

Cited by 23 publications

(21 citation statements)

References 40 publications

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“…These results are in contrast with those obtained in sunflower. Indeed, a negative correlation has been demonstrated between the two main unsaturated fatty acids (oleic and linoleic acids) under a late sowing date [24]. Those results may suggest specific pathways to accumulate unsaturated fatty acids in safflower when compared to sunflower.…”

Section: Effect Of Delaying Sowing Date On Fatty Acids Composition Inmentioning

confidence: 80%

“…Delaying the sowing date induced a decrease of unsaturated fatty acids in our experiment. Environmental effects (temperature or water regimes) have already been described to impact significantly the seed composition of several oil crops [23][24][25]. More recently, the effect of intercepted solar radiation was reported.…”

Section: Effect Of Delaying Sowing Date On Fatty Acids Composition Inmentioning

confidence: 98%

“…Similar trends have already been reported in sunflower [26,33] and rapeseed [35] studies. Indeed, the QTL of erucic acid and sterols colocalizations resulted from the pleiotropic effect exerted by the erucic acid genes in rapeseed [35,36] and a negative correlation was found between sterols and oil content in sunflower [24,26]; which suggests that the carbon allocation may be in favour of phytosterols.…”

Section: Sterols Content and Repartition In Safflower Seedsmentioning

confidence: 99%

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Effect of Sowing Dates on Fatty Acids and Phytosterols Patterns of Carthamus tinctorius L.

et al. 2019

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Field experiments were carried out at the Regional Centre of Experimentation in Organic agriculture at Auch (near Toulouse, South west of France). Due to the high potential applications for its oil components such as fatty acids and phytosterols, safflower (Carthamus tinctorius L.) is considered as an emerging crop. Safflower plants, as many other oil crops, are submitted to environmental stresses that modify seed composition. Nevertheless, few reports are available about the effects of environmental conditions on fatty acid and phytosterol compositions in safflower. Different rainfall supplies can be managed by delaying the sowing dates. In this study, fatty acid and phytosterol contents have been evaluated in safflower seeds cultivated at two sowing dates (conventional and late) that led to a differential of rainfall during seed development. At harvest, seeds were used for oil extraction. Fatty acid composition was performed by using GC-FID. A set of seeds was dehulled to separate the almond (embryo) and hull to release the extraction and measurement of sterol contents in the two compartments by GC-FID. A delay of sowing increased the content of all sterol categories but induced a significant decrease in fatty acids. The ratio of saturated to unsaturated fatty acids increased under a delaying sowing. The repartition of phytosterols was ¾ and ¼ of total sterols in the embryo and the hull, respectively. These results could make the use of hull (considered as waste) possible, help breeders to improve safflower oil composition and develop new industrial applications.

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Section: Effect Of Delaying Sowing Date On Fatty Acids Composition Inmentioning

confidence: 80%

Section: Effect Of Delaying Sowing Date On Fatty Acids Composition Inmentioning

confidence: 98%

Section: Sterols Content and Repartition In Safflower Seedsmentioning

confidence: 99%

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Effect of Sowing Dates on Fatty Acids and Phytosterols Patterns of Carthamus tinctorius L.

et al. 2019

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“…Previous studies also reported that the irrigation during safflower grown cycle increased in seeds yield (Lovelli et al, 2007: Istanbulluoglu et al, 2009 and conditions of water stress in safflower reduced its productivity (Eslam, 2011;Singh et al, 2016). In Brazil the seed yield of safflower under irrigation regime was 1,552.1 kg/ha and the mean value of seed yield under water deficit followed by rehydration regime -1,144.9 kg/ha (Bortolheiro & Silva, 2017). It was observed (Feyzollahzadeh et al, 2014) that weight of one safflower seed within the various irrigation regimes was significantly different at (p≤0.01) and modified into the range of 0.040 -0.055 g. The most direct effect on seed yield was obtained from 1000-seed weight of safflower under irrigation.…”

Section: Resultsmentioning

confidence: 90%

Safflower Yield Response to Irrigation and Gamma Irradiation

Ivanova¹,

Smerea²

2019

AgricultForest

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Safflower (Carthamus tinctorius L.) is drought resistant plant, but the adequate irrigation is important for the increasing of safflower yield. The effects of drip irrigation associated with pre-sowing gamma irradiation of seeds on plant growth and yield were investigated. The seeds were irradiated by gamma rays (60 Co) at various doses (50, 100, 150Gy). The safflower plants were grown under drip irrigation and rainfed conditions of the Republic of Moldova in season of 2017. Modifications of bio-morphological (height, number of secondary branch, developed and undeveloped inflorescence) and yield attributing (number of seeds per head and per plant, weight of seeds per plant and 1000-seed weight) characters of safflower were studied. The results showed that the drip irrigation influenced positive and statistically significant (p≤0.001) on all studied characters of safflower. The plant grown under irrigation had the number of developed inflorescences, the number of seeds and the weight of seeds per plant, respectively 1.83, 1.81 and 2.50 times more than rainfed plants; as well as undeveloped inflorescence less 2.47 times. The contribution of pre-sowing irradiation was not so pronounced. The impact of factors (irradiation, irrigation) and their interaction for the improvement of bio-morphological and yield attributing characters were determined. The significant impact of growing condition on the number of seeds per plant at p≤0.01, weight of seeds per plant and 1000-seeds weight at p≤0.01 was established. The gamma radiation had the contribution to changes in 1000-seeds weight but the contribution of growing condition on this character was 15.7 times stronger.

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“…The stimulus dose varies for each species according to the plant's sensitivity to glyphosate, requiring individual studies to determine the dose. In addition to its commercial value, safflower ( Carthamus tinctorius L.) can be cultivated in regions with little available water and low production costs, and is therefore an alternative crop for growing during the dry season in Brazil 23 . Drought is one of the most limiting factors for agricultural crops in terms of growth and productivity; 24 it promotes changes from gene expression to morphology, including metabolic adjustments and photosynthetic changes 25 …”

Section: Introductionmentioning

confidence: 99%

Glyphosate hormesis mitigates the effect of water deficit in safflower (Carthamus tinctorius L.)

Santos

Silva

Amorim

et al. 2021

Pest Management Science

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BACKGROUND The current climate change scenario may affect water availability in the soil, impacting the agricultural sector. Planting of safflower (Carthamus tinctorius L.) has increased because of its potential for cultivation under drought conditions during the off‐season in Brazil and its high potential for use in biofuel production. There are several reports about the potential of low doses of glyphosate to promote plant growth and development (hormesis). Despite the concept of glyphosate hormesis being well established, little is known about any mitigating effect on plants under water deficit conditions. The hypothesis raised is that low doses of glyphosate promote water stress tolerance during the growth and reproductive phases of C. tinctorius exposed to different water regimes. RESULTS In regimes with and without water deficiency, growth of plants treated with low doses of glyphosate increased, reaching a maximum stimulus amplitude of ~ 131% of control. However, plants under water deficit required lower doses to achieve maximum growth and development. They maintained photosynthetic rates at the level of well‐watered plants because they had reduced stomatal conductance and transpiration. Gains in plant height and leaf area were the same as for controls. CONCLUSIONS Low doses of glyphosate can act as mitigators of water deficit in C. tinctorius, allowing plants to maintain their metabolism, reaching levels close to those of plants without water stress, as observed for plant height and leaf area. Our findings indicate that there are even greater implications for understanding glyphosate hormesis in plants under drought conditions, given the current climate change scenario. © 2020 Society of Chemical Industry

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Physiological response and productivity of safflower lines under water deficit and rehydration

Cited by 23 publications

References 40 publications

Effect of Sowing Dates on Fatty Acids and Phytosterols Patterns of Carthamus tinctorius L.

Effect of Sowing Dates on Fatty Acids and Phytosterols Patterns of Carthamus tinctorius L.

Safflower Yield Response to Irrigation and Gamma Irradiation

Glyphosate hormesis mitigates the effect of water deficit in safflower (Carthamus tinctorius L.)

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