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Grain Yield and Qualitative of Rapeseed Genotypes Change in Response to Exogenous Application of Salicylic Acid and Planting Density

Kornertrag und qualitative Veränderung von Rapsgenotypen als Reaktion auf die exogene Anwendung von Salicylsäure und die Pflanzdichte

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Abstract

A factorial split-plot experiment (2015–17) was carried out in a randomized complete block design with three replications at Karaj, Iran, to investigate the quantitative and qualitative responses of rapeseed genotypes to the exogenous application of salicylic acid at various plant densities. Three plant densities (40, 50, and 60 plants m−2) and two levels of application of salicylic acid (non-application and foliar application) were factorial in the main plots and six rapeseed genotypes (HW118, WPN6, HL3721, L14, Tassilo, and Natali) were in sub-plots. The number of siliques per plant, number of seeds per silique, seed yield, and oil yield improved when rapeseed genotypes treated with salicylic acid. The oil quality of studied genotypes enhanced due to a reduction in erucic acid and glucosinolate contents under the foliar application of salicylic acid. On average, by foliar application of salicylic acid, the highest seed and oil yields at the density of 40 plants m−2 belonged to the L14 genotype, while the HW118 produced the maximum seed and oil yields at the densities of 50 and 60 plants m−2. Generally, rapeseed genotypes should be cultivated at the density of 40 plant m−2 and treated with foliar application of salicylic acid for achieving the maximum seed yield and oil quality.

Zusammenfassung

Ein faktorieller Split-Plot-Versuch (2015–17) wurde in einem randomisierten vollständigen Blockdesign mit drei Wiederholungen in Karaj, Iran, durchgeführt, um die quantitativen und qualitativen Reaktionen von Rapsgenotypen auf die exogene Anwendung von Salicylsäure bei verschiedenen Pflanzdichten zu untersuchen. Drei Pflanzdichten (40, 50 und 60 Pflanzen pro m2) und zwei Arten der Salicylsäureapplikation (keine Applikation und Blattapplikation) waren Faktoren in den Hauptplots, sechs Rapsgenotypen (HW118, WPN6, HL3721, L14, Tassilo und Natali) in den Subplots. Die Anzahl der Schoten pro Pflanze, die Anzahl der Samen pro Schote, der Samenertrag und der Ölertrag verbesserten sich, wenn die Rapsgenotypen mit Salicylsäure behandelt wurden. Die Ölqualität der untersuchten Genotypen verbesserte sich aufgrund einer Reduzierung des Erucasäure- und Glucosinolatgehalts unter der Blattapplikation von Salicylsäure. Im Durchschnitt erreichte bei einer Blattapplikation von Salicylsäure der Genotyp L14 bei einer Dichte von 40 Pflanzen pro m2 die höchsten Samen- und Ölerträge, während HW118 bei Dichten von 50 und 60 Pflanzen pro m2 die höchsten Samen- und Ölerträge lieferte. Generell sollten die Rapsgenotypen bei einer Dichte von 40 Pflanzen pro m2 angebaut und mit Salicylsäure behandelt werden, um den maximalen Samenertrag und die beste Ölqualität zu erreichen.

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Acknowledgements

This study is a part of a Ph.D. dissertation. The authors gratefully acknowledge the support provided for this survey by the Islamic Azad University, Tehran, Iran, and Seed and Plant Improvement Institute (SPII), Karaj, Iran.

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Authors and Affiliations

  1. Department of Agronomy, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran

    Farnaz Ganj-Abadi, Behzad Sani & Hamid Mozafari

  2. Agricultural Research, Education and Extension Organization (AREEO), Seed and Plant Improvement Institute (SPII), Karaj, Iran

    Amir Hosein Shirani Rad

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  1. Farnaz Ganj-Abadi
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  2. Amir Hosein Shirani Rad
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  3. Behzad Sani
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  4. Hamid Mozafari
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Correspondence to Behzad Sani.

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F. Ganj-Abadi, A.H. Shirani Rad, B. Sani and H. Mozafari declare that they have no competing interests.

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Ganj-Abadi, F., Shirani Rad, A.H., Sani, B. et al. Grain Yield and Qualitative of Rapeseed Genotypes Change in Response to Exogenous Application of Salicylic Acid and Planting Density. Gesunde Pflanzen 73, 335–344 (2021). https://doi.org/10.1007/s10343-021-00558-2

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