Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains

Singh, Sukhbir; Angadi, Sangamesh V.; Grover, Kulbhushan; Begna, Sultan; Auld, D. L.

doi:10.1016/j.agwat.2015.10.010

Cited by 47 publications

(31 citation statements)

References 38 publications

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“…This confirms the more stressful environment in 2013 compared to 2014 as also explained in Y l results. Similar osmotic adjustment was observed in safflower under salinity stress (Singh et al, 2014) and under decreasing irrigation levels (Singh et al, 2016a). In 2013, after recovery, VS treatment recorded the second highest P n after FI treatment.…”

Section: Photosynthetic Traitssupporting

confidence: 77%

“…Seed yield had a stronger relationship with plant biomass compared to heads per plant, seeds per head and 1000-seed weight (Table 3). Singh et al (2016a) suggested the need for a dry environment during the reproductive and maturity stages of safflower for high seed yield, which might have been a factor in 2014. 3A, 3B, and 3D).…”

Section: Yield-attributing Characters and Seed Yieldmentioning

confidence: 99%

“…Increased seed yield in 2014 compared to 2013 was attributed to greater biomass production and photosynthesis. Partitioning assimilates for seed development instead of producing more vegetative parts might be the reason for greater oil content at decreased water availabilities compared to increased water availabilities (Singh et al, 2016a). 1).…”

Section: Yield-attributing Characters and Seed Yieldmentioning

confidence: 99%

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Spring Safflower Performance under Growth Stage Based Irrigation in the Southern High Plains

et al. 2016

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Water stress is the most important environmental factor limiting crop yield in the southern High Plains. Drought tolerant crops along with deficit irrigation strategies may be promising for sustainable agriculture in the region. The objective of this study was to assess water relations, photosynthesis, yield‐forming components, and yield of spring safflower (Carthamus tinctorius L.) cultivars under growth stage based irrigation management. A blocked split plot design was used with irrigation treatments (fully irrigated [FI], stress at vegetative stage [VS], stress at reproductive stage [RS], and dryland [DL]) as the main plot and cultivars (PI8311, 99OL and Nutrisaff) as subplot in four replications. Measurements of water potential (Ψl) indicated that irrigation treatments imposed water stress on safflower. Safflower responded to stress by regulating stomata and osmotic adjustment. Water stress significantly reduced photosynthesis (Pn), leaf area index (LAI) and light interception in all stress treatments, resulting in decreased biomass accumulation. Seed yield of safflower was strongly related to biomass production (R2 = 0.61). Among yield‐forming traits, heads per plant were more influential in yield formation than seeds per head and 1000‐seed weight. Compared to the FI treatment, RS treatment reduced seed yield by 19 and 20% in 2013 and 2014, respectively; while the same reduction in VS treatment was 25 and 22%, respectively. However, seed yield differences between RS and VS treatments were not statistically significant.

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Section: Photosynthetic Traitssupporting

confidence: 77%

Section: Yield-attributing Characters and Seed Yieldmentioning

confidence: 99%

Section: Yield-attributing Characters and Seed Yieldmentioning

confidence: 99%

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Spring Safflower Performance under Growth Stage Based Irrigation in the Southern High Plains

et al. 2016

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“…Singh et al (2016a) observed an increase in oil content of safflower lines under water deficit. During stress, there is an alteration of the plant dynamics, which prioritizes the translocation of photo assimilates for the development of the seeds, and lower water availability may cause an increase in the oil content of the seeds.…”

Section: Discussionmentioning

confidence: 85%

“…A number of studies showed that relative water content and water potential are affected by water deficit in safflower (Hussain et al 2016, Singh et al 2016a, c, Eslam 2011, Hojati et al 2011) and fig (Gholami et al 2012, and they are widely used as indicator of the water status of the plant (Hojati et al 2011).…”

Section: Discussionmentioning

confidence: 99%

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

Bortolheiro

Silva

2017

An. Acad. Bras. Ciênc.

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Water deficit is one of the major stresses affecting plant growth and productivity worldwide. Plants induce various morphological, physiological, biochemical and molecular changes to adapt to the changing environment. Safflower (Carthamus tinctorius L.), a potential oil producer, is highly adaptable to various environmental conditions, such as lack of rainfall and temperatures. The objective of this work was to study the physiological and production characteristics of six safflower lines in response to water deficit followed by rehydration. The experiment was conducted in a protected environment and consisted of 30 days of water deficit followed by 18 days of rehydration. A differential response in terms of photosynthetic pigments, electrolyte leakage, water potential, relative water content, grain yield, oil content, oil yield and water use efficiency was observed in the six lines under water stress. Lines IMA 04, IMA 10, IMA 14 showed physiological characteristics of drought tolerance, with IMA 14 and IMA 16 being the most productive after water deficit. IMA 02 and IMA 21 lines displayed intermediate characteristics of drought tolerance. It was concluded that the lines responded differently to water deficit stress, showing considerable genetic variation and influence to the environment.

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The effects of seasonal climate change on the safflower genotypes productivity under Central Anatolian conditions

Koç

2024

J Americ Oil Chem Soc

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This study aimed to investigate the effect of seasonal climate change on safflower genotypes productivity in Central Anatolian conditions during 2021 and 2022. The research focused on seed yield, oil content, and oil yield, considering variations in growing degree days (GDD) at different growth stages. In both years, seed yield was significantly affected by lack of rainfall. In 2021, safflower genotypes had an average seed yield of 1540 kg ha−1, while in 2022, it increased to 2390 kg ha−1 due to higher rainfall during critical growth stages. Different genotypes showed different performances in seed yield each year, highlighting the importance of selecting drought‐tolerant genotypes for breeding programmes. Oil content also showed significant variations between genotypes and years. Drought stress during flowering and seed filling periods generally led to a decrease in safflower oil content. However, in 2021, despite drought during the seedling stage, there was an increase in average oil content, possibly due to compensatory mechanisms related to reduced seed yield and dry matter content. In addition, the study looked at GDD values at different growth stages and found considerable variation among genotypes in GDD accumulation. Genotypes with higher GDD accumulation tended to have higher seed and oil yields, indicating better stress tolerance. Conversely, early maturing genotypes with lower GDD levels were better suited for regions with lower average temperatures. The results highlight the importance of considering both rainfall and temperature factors when selecting safflower genotypes for specific regions. In conclusion, the study highlights the impact of seasonal climate change on safflower productivity and the need to develop new safflower varieties capable of adapting to the predicted hotter and drier conditions due to climate change.

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Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains

Cited by 47 publications

References 38 publications

Spring Safflower Performance under Growth Stage Based Irrigation in the Southern High Plains

Spring Safflower Performance under Growth Stage Based Irrigation in the Southern High Plains

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

The effects of seasonal climate change on the safflower genotypes productivity under Central Anatolian conditions

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