Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application

Onion is an important crop with significant roles in human diets. The growth, yield, and quality of vegetable crops, including onions, are more vulnerable to water stress than other crops. In this study, different levels of deficit irrigation (DI) as factor A (a1: 80%, a2: 70%, and a3: 60% of soil f...

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Autores principales:	Forotaghe Zahra Amiri, Souri Mohammad Kazem, Jahromi Marzieh Ghanbari, Torkashvand Ali Mohammadi
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	antioxidant enzymes biostimulant deficit irrigation drought leaf protein minerals Agriculture S Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/463c41c9ac784a5db6c814db968ee010
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spelling	oai:doaj.org-article:463c41c9ac784a5db6c814db968ee0102021-12-05T14:10:59ZPhysiological and biochemical responses of onion plants to deficit irrigation and humic acid application2391-953110.1515/opag-2021-0050https://doaj.org/article/463c41c9ac784a5db6c814db968ee0102021-11-01T00:00:00Zhttps://doi.org/10.1515/opag-2021-0050https://doaj.org/toc/2391-9531Onion is an important crop with significant roles in human diets. The growth, yield, and quality of vegetable crops, including onions, are more vulnerable to water stress than other crops. In this study, different levels of deficit irrigation (DI) as factor A (a1: 80%, a2: 70%, and a3: 60% of soil field capacity [FC]) and humic acid (HA) as factor B (b1: without and b2: with HA application) were evaluated on onion growth characteristics in a factorial design with four replications. The results showed that the interaction of DI and HA was significant on leaf protein, peroxidase (POD), superoxide dismutase (SOD), and on bulb protein and potassium (K) concentrations. The highest record of these traits was observed in a3b2 (highest DI with HA application), and their lowest was in those at first level of DI (a1). Leaf protein and, to a lesser extent, bulb protein were increased by DI and HA applications. DI at 60% but not at 70% FC significantly reduced bulb fresh weight. There was a gradual increase in leaf proline, soluble sugars, protein, catalase (CAT), POD, SOD activity, and bulb K by application of DI; however, most of bulb traits including protein, iron (Fe), zinc (Zn), and CAT and POD activity were increased only under highest DI level (a3: 60% FC). However, application of HA further increased the soluble sugars and protein concentration as well as the POD and SOD activities of leaves, and protein, Fe, K concentrations, and CAT activity of bulbs under DI. The results indicated that HA benefitted onion growth particularly under DI conditions.Forotaghe Zahra AmiriSouri Mohammad KazemJahromi Marzieh GhanbariTorkashvand Ali MohammadiDe Gruyterarticleantioxidant enzymesbiostimulantdeficit irrigationdroughtleaf proteinmineralsAgricultureSAgriculture (General)S1-972ENOpen Agriculture, Vol 6, Iss 1, Pp 728-737 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	antioxidant enzymes biostimulant deficit irrigation drought leaf protein minerals Agriculture S Agriculture (General) S1-972
spellingShingle	antioxidant enzymes biostimulant deficit irrigation drought leaf protein minerals Agriculture S Agriculture (General) S1-972 Forotaghe Zahra Amiri Souri Mohammad Kazem Jahromi Marzieh Ghanbari Torkashvand Ali Mohammadi Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
description	Onion is an important crop with significant roles in human diets. The growth, yield, and quality of vegetable crops, including onions, are more vulnerable to water stress than other crops. In this study, different levels of deficit irrigation (DI) as factor A (a1: 80%, a2: 70%, and a3: 60% of soil field capacity [FC]) and humic acid (HA) as factor B (b1: without and b2: with HA application) were evaluated on onion growth characteristics in a factorial design with four replications. The results showed that the interaction of DI and HA was significant on leaf protein, peroxidase (POD), superoxide dismutase (SOD), and on bulb protein and potassium (K) concentrations. The highest record of these traits was observed in a3b2 (highest DI with HA application), and their lowest was in those at first level of DI (a1). Leaf protein and, to a lesser extent, bulb protein were increased by DI and HA applications. DI at 60% but not at 70% FC significantly reduced bulb fresh weight. There was a gradual increase in leaf proline, soluble sugars, protein, catalase (CAT), POD, SOD activity, and bulb K by application of DI; however, most of bulb traits including protein, iron (Fe), zinc (Zn), and CAT and POD activity were increased only under highest DI level (a3: 60% FC). However, application of HA further increased the soluble sugars and protein concentration as well as the POD and SOD activities of leaves, and protein, Fe, K concentrations, and CAT activity of bulbs under DI. The results indicated that HA benefitted onion growth particularly under DI conditions.
format	article
author	Forotaghe Zahra Amiri Souri Mohammad Kazem Jahromi Marzieh Ghanbari Torkashvand Ali Mohammadi
author_facet	Forotaghe Zahra Amiri Souri Mohammad Kazem Jahromi Marzieh Ghanbari Torkashvand Ali Mohammadi
author_sort	Forotaghe Zahra Amiri
title	Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
title_short	Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
title_full	Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
title_fullStr	Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
title_full_unstemmed	Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
title_sort	physiological and biochemical responses of onion plants to deficit irrigation and humic acid application
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/463c41c9ac784a5db6c814db968ee010
work_keys_str_mv	AT forotaghezahraamiri physiologicalandbiochemicalresponsesofonionplantstodeficitirrigationandhumicacidapplication AT sourimohammadkazem physiologicalandbiochemicalresponsesofonionplantstodeficitirrigationandhumicacidapplication AT jahromimarziehghanbari physiologicalandbiochemicalresponsesofonionplantstodeficitirrigationandhumicacidapplication AT torkashvandalimohammadi physiologicalandbiochemicalresponsesofonionplantstodeficitirrigationandhumicacidapplication
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Physiological and biochemical responses of onion plants to deficit irrigation and humic acid application

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