Improved Quinoa Growth, Physiological Response, and Yield by Hydropriming Under Drought Stress Conditions
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ORIGINAL ARTICLE / ORIGINALBEITRAG
Improved Quinoa Growth, Physiological Response, and Yield by Hydropriming Under Drought Stress Conditions Fathollah Nadali1,2 · Hamid Reza Asghari1 · Hamid Abbasdokht1 · Vajiheh Dorostkar1 · Mahmoud Bagheri3 Received: 30 March 2020 / Accepted: 4 November 2020 © Springer-Verlag GmbH Deutschland, ein Teil von Springer Nature 2020
Abstract Quinoa is a traditional Andean seed crop highly tolerant to abiotic stresses. Since most seed crops cultivars are sensitive to drought stress, quinoa is considered as a valuable candidate for severe environmental conditions to which the plant is exposed. In this study we focused on the impact of hydropriming on drought tolerance in three quinoa cultivars (Q26, Q29 and Titicaca) in two arid regions of Iran. We observed that, under field conditions, quinoa responded to drought stress with a significant decrease in growth, yield component, seed yield and biochemical traits including photosynthetic pigments and relative water contents. In contrast, malondialdehyde, electrolyte leakage and proline concentration in all quinoa cultivars in both regions increased. However, seed priming significantly improved growth and seed yield. The results of the correlation analysis revealed that seed yield was highly positively related to pigments and proline concentration. Therefore, it could be suggested that these traits are efficient and reliable indicators for indirect selection of tolerant quinoa cultivars under drought stress conditions. In general, Q26 and Q29 were considered as superior cultivars for well-watered conditions and Titicaca cultivar was found relatively more drought tolerant than other cultivars. This study may contribute to the understanding of seed priming could be applied as an efficient approach to ameliorate the adverse effects of drought stress in quinoa cultivars.
Keywords Drought stress · Proline · Seed priming · Titicaca
Hamid Reza Asghari
[email protected] 1
Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran
2
Crop and Horticultural Science Research Department of Semnan (Shahrood), Agricultural and Natural Resources Research Center, AREEO, Shahrood, Iran
3
Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
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F. Nadali et al.
Wachstum, physiologische Reaktion und Ertrag von Quinoa unter Trockenstressbedingungen durch Hydropriming verbessert Zusammenfassung Quinoa ist eine traditionelle Saatgutpflanze der Anden, die sehr tolerant gegenüber abiotischem Stress ist. Da die meisten Saatgutsorten empfindlich auf Trockenstress reagieren, gilt Quinoa als wertvoller Kandidat für schwere Umweltbedingungen, denen die Pflanze ausgesetzt ist. In dieser Studie konzentrierten wir uns auf die Auswirkungen von Hydropriming auf die Trockentoleranz bei drei Quinoa-Sorten (Q26, Q29 und Titicaca) in zwei Trockengebieten des Irans. Wir beobachteten, dass Quinoa unter Feldbedingungen auf Trockenstress mit einer signifikanten Abnahme des Wachstums, der
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