Effects of foliar zinc application on yield and oil quality of rapeseed genotypes under drought stress

Ashkiani, Ashkan; Sayfzadeh, Saeed; Rad, Amir Hossein Shirani; Valadabadi, Alireza; Masouleh, Esmaeil Hadidi

doi:10.1080/01904167.2020.1739299

Cited by 28 publications

(13 citation statements)

References 14 publications

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“…Due to the rainfall deficit in various regions of the world, which has caused drought, releasing the varieties/ lines of plants which are resistant to drought stress has a particular importance in the regions of the world with low levels of precipitation. The rapeseed (Brassica napus L.) crop contains 40-44% oil and is considered to be one of the most important edible oilseeds (Ashkiani et al, 2020;Cashin et al, 2014;FAO, 2018), being the third annual oil crop in the world after soybean and oil palm (Enjalbert et al, 2013). One of the most critical factors that inhibits the development of the area under cultivation and prevents the successful production of rapeseed in semi-arid regions is moisture deficiency at the end of the growth period (reproductive stage) to which it is very susceptible (Nasiri et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Seed yield and physiological responses to deal with drought stress and late sowing date for promising lines of rapeseed (<i>Brassica napus</i> L.)

Teymoori¹,

Ardakani²,

Rad³

et al. 2020

Int. Agrophys.

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The introduction of new genotypes of crop plants is among the most strategic research programmes, especially in arid and semi-arid regions. To study the effect of drought stress on seed yield and some physiological traits of promising lines of rapeseed at different sowing dates, an experiment was conducted for two years (2015-2017) in a semi-arid region of Iran. In this research, two conventional sowing dates were set in October 12 and November 1 (late sowing). Irrigation was carried out at two levels: normal irrigation (control) and irrigation interruption from the silique formation stage to the next stage (late-season drought stress). The genotypes included four promising lines (L1112, L1091, L1093, L1206), and a cultivar (Okapi) as a control. Results showed that delayed sowing and drought stress increased carbohydrate content and decreased seed yield, with the highest carbohydrate content and highest yield loss in L1112 and the lowest carbohydrate and lowest yield loss in the L1206 line. Among the physiological traits measured, stomatal resistance had the highest degree of correlation and the highest direct negative effect on seed yield, which declined with increasing stomatal resistance. L1112 had the highest stomatal resistance (52.76 s cm-1) in delayed sowing and drought stress conditions. Therefore, L1206 and L1112 were revealed to be resistant and sensitive lines, respectively.

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Section: Introductionmentioning

confidence: 99%

Seed yield and physiological responses to deal with drought stress and late sowing date for promising lines of rapeseed (<i>Brassica napus</i> L.)

Teymoori¹,

Ardakani²,

Rad³

et al. 2020

Int. Agrophys.

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“…This ionomic fluctuation can be considered as a specific effect of drought on all mineral nutrition, and this is supported by the fact that a substantial number of published articles have reported the drought‐alleviating benefits of remedial nutrient supplies such as foliar application or seed priming (Ghafarian et al, 2013; Kareem et al, 2017; Monjezi et al, 2013; Pourjafar et al, 2016; Zandipour et al, 2018). To the best of our knowledge, these findings originate from empirical approaches under field conditions, where positive effects have been observed on physiological parameters or yield components following compensatory supplies of Fe, Zn (Ashkiani et al, 2020; Monjezi et al, 2013; Zandipour et al, 2018), Mn (Khan et al, 2016), or Mo (Ghafarian et al, 2013; Kareem et al, 2017) in combination or alone, rather than by demonstrations of (i) how drought specifically affects the nutrient uptake and tissue content and (ii) how the nutrient input might counteract it. Indeed, while micronutrients such as zinc (Zn), copper (Cu), manganese (Mn), and iron (Fe) are required in much lower amounts by the plant (Marschner, 2012), they act as metal components or regulatory cofactors in a large number of enzymes involved in photosynthesis and antioxidative metabolism (van van Oijen et al, 2004; Hänsch & Mendel, 2009; da da Silva et al, 2011; Dalcorso et al, 2014; Andresen et al, 2018), which may explain their beneficial effects.…”

Section: Discussionmentioning

confidence: 99%

Drought specifically downregulates mineral nutrition: Plant ionomic content and associated gene expression

D’Oria

Courbet

Billiot³

et al. 2022

Plant Direct

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One of the main limiting factors of plant yield is drought, and while the physiological responses to this environmental stress have been broadly described, research addressing its impact on mineral nutrition is scarce. Brassica napus and Triticum aestivum were subjected to moderate or severe water deficit, and their responses to drought were assessed by functional ionomic analysis, and derived calculation of the net uptake of 20 nutrients. While the uptake of most mineral nutrients decreased, Fe, Zn, Mn, and Mo uptake were impacted earlier and at a larger scale than most physiological parameters assessed (growth, ABA concentration, gas exchanges and photosynthetic activity). Additionally, in B. napus , the patterns of 183 differentially expressed genes in leaves related to the ionome (known ionomic genes, KIGs) or assumed to be involved in transport of a given nutrient were analyzed. This revealed three patterns of gene expression under drought consisting of up (transport of Cl and Co), down (transport of N, P, B, Mo, and Ni), or mixed levels (transport of S, Mg, K, Zn, Fe, Cu, or Mn) of regulation. The three patterns of gene regulations are discussed in relation to specific gene functions, changes of leaf ionomic composition and with consideration of the crosstalks that have been established between elements. It is suggested that the observed reduction in Fe uptake occurred via a specific response to drought, leading indirectly to reduced uptake of Zn and Mn, and these may be taken up by common transporters encoded by genes that were downregulated.

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“…Similarly, rapeseed oil is the largest source of vegetable oil in the world. Application of 50 g L -1 of Zn increased the rapeseed yield upto 6310 Kg ha -1 with the highest level of oleic acid content 67% and least glucosinate 0.8 micromolar per gram [51]. Further more increasing exposure to drought level increase the seed oil content in the rapeseed [51].…”

Section: Zinc Fertilizersmentioning

confidence: 96%

“…Application of 50 g L -1 of Zn increased the rapeseed yield upto 6310 Kg ha -1 with the highest level of oleic acid content 67% and least glucosinate 0.8 micromolar per gram [51]. Further more increasing exposure to drought level increase the seed oil content in the rapeseed [51]. Water and nutrient are two important factors that limit the growth and production of the crop worldwide.…”

Section: Zinc Fertilizersmentioning

confidence: 99%

The First Reported Case of Bullous Lichen Planus/Systemic Lupus Erythematosus Overlap Syndrome

Zhuo¹

2021

BJSTR

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Agriculture is the mainstay between humans and the environment. The existence of arbuscular mycorrhizal fungi (AMF), on the earth, is about 600 million years ago. The application of mycorrhizae as biofertilizer is in increasing trend. Mycorrhizae improve several agricultural practices like better nutrient cycling, improving crop yield, and remediation of toxic heavy metals from soil. There is much variation in arbuscular mycorrhizal association although 80% of the plant species are infected with mycorrhizae. Mycorrhizal dependency (MD) is defined as the degree to which a host plant is dependent on AMF to produce maximum growth or yield at a given level of soil fertility. Plant with high MD need to feed with a higher amount of carbon and lipid to the fungus than a plant with less MD. Mycorrhizae modify, maintain, and create habitat by directly and indirectly regulating biotic and abiotic environments. Mycorrhizae derived photosynthetically formed C for the growth and uptake, tolerance against abiotic stress such as drought, heavy metals, salinity as well as protecting from pathogen attack to host plant and preventing from erosion. Application of ZnO would have been the probable solution of mitigating drought.ZnO treatment decreased the adverse effects of drought stress in plants by enhancing antioxidant enzyme activity and changing physiological parameters. Heat stress affects many processes in a variety of plants as water relations, nutrient uptake, photosynthesis, assimilate partitioning, respiration, growth, and reproduction, and induced oxidative damage. Foliar application of ZnSO4.7H2O effectively alleviated by enhancing Zn concentration, superoxide dismutase activity, chlorophyll content, Fv/Fm ratio, and photosystem II under heat stress. In maize, there is a substantial reduction of germination above 37oC. All the parameters recorded in wheat, namely, no of tillers, plant height, spike length, no of spikelets per spike, no of grains per spike, 1000 grain weight, biological yield, grain yield and harvesting index, Ca, Mg, Fe, Zn, Cu and protein content are significantly affected by the mycorrhizal application. Almost 25% of recommended dose of phosphate fertilizer could be saved as in Niger(Guizotia abyssinica)by inoculating Glomusmosseae. Zinc is a vital micronutrient for many plants but its excess can be calamitous.AMF contributes to plant Zn uptake but their role in the edible portion of the crop has not been studied yet. The mycorrhizal pathway of Zn uptake contributed up to 24.3% of the total above-ground Zn in wheat and up to 12% of that Zn in Barley. The greatest contribution by the mycorrhizal pathway was observed in Barley at the lowest Zn addition and in wheat at the .highest one. Besides the grain yield of bread wheat was increased by AMF.

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Effects of foliar zinc application on yield and oil quality of rapeseed genotypes under drought stress

Cited by 28 publications

References 14 publications

Seed yield and physiological responses to deal with drought stress and late sowing date for promising lines of rapeseed (<i>Brassica napus</i> L.)

Seed yield and physiological responses to deal with drought stress and late sowing date for promising lines of rapeseed (<i>Brassica napus</i> L.)

Drought specifically downregulates mineral nutrition: Plant ionomic content and associated gene expression

The First Reported Case of Bullous Lichen Planus/Systemic Lupus Erythematosus Overlap Syndrome

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