Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings

ABSTRACT Drought, one of the most detrimental environmental factors for agricultural production all over the world, severely represses plant survival and productivity of crops. Microbial technology plays a prominent part in improving drought resistance of crops. Here, endophytic bacterium Bacillus m...

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Autores principales:	Li,Heqin, Zhao,Yanming, Jiang,Xuwen
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2019
Materias:	Antioxidant system Bacillus megaterium drought stress indoleacetic acid production phosphate solubilization property Zea mays
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000300396
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spelling	oai:scielo:S0718-583920190003003962019-07-18Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlingsLi,HeqinZhao,YanmingJiang,Xuwen Antioxidant system Bacillus megaterium drought stress indoleacetic acid production phosphate solubilization property Zea mays ABSTRACT Drought, one of the most detrimental environmental factors for agricultural production all over the world, severely represses plant survival and productivity of crops. Microbial technology plays a prominent part in improving drought resistance of crops. Here, endophytic bacterium Bacillus megaterium strain HX-2 was isolated from healthy leaves of Agastache rugosa (Fisch. & C.A. Mey.) Kuntze; its drought tolerance level and growth promoting characteristics were carried out in vivo, and the effects of the bacterium on morphological, physiological and biochemical variables of maize (Zea mays L.) seedling under drought stress were investigated in a pot experiment. As a result, B. megaterium strain HX-2 had 15% tolerance to polyethylene glycol 6000, produced indoleacetic acid and dissolved phosphate. After inoculation with strain HX-2, plant height, root length, plant biomass, root:shoot ratio, root activity, leaf relative water content, proline content, plant P content, and enzyme activities including superoxide dismutase, catalase, peroxidase and ascorbate peroxidase increased considerably by 7.69%-42.9%, whereas electrolyte leakage and malondialdehyde content declined significantly by 28.17%-42.38% relative to drought stress. These changes suggested that strain HX-2 was able to alleviate negative effects of drought stress on plants by producing indoleacetic acid and dissolving phosphate to improve the antioxidant system of plants. This study will provide theoretical reference for cultivation of maize under drought stressinfo:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.79 n.3 20192019-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000300396en10.4067/S0718-58392019000300396
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Antioxidant system Bacillus megaterium drought stress indoleacetic acid production phosphate solubilization property Zea mays
spellingShingle	Antioxidant system Bacillus megaterium drought stress indoleacetic acid production phosphate solubilization property Zea mays Li,Heqin Zhao,Yanming Jiang,Xuwen Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
description	ABSTRACT Drought, one of the most detrimental environmental factors for agricultural production all over the world, severely represses plant survival and productivity of crops. Microbial technology plays a prominent part in improving drought resistance of crops. Here, endophytic bacterium Bacillus megaterium strain HX-2 was isolated from healthy leaves of Agastache rugosa (Fisch. & C.A. Mey.) Kuntze; its drought tolerance level and growth promoting characteristics were carried out in vivo, and the effects of the bacterium on morphological, physiological and biochemical variables of maize (Zea mays L.) seedling under drought stress were investigated in a pot experiment. As a result, B. megaterium strain HX-2 had 15% tolerance to polyethylene glycol 6000, produced indoleacetic acid and dissolved phosphate. After inoculation with strain HX-2, plant height, root length, plant biomass, root:shoot ratio, root activity, leaf relative water content, proline content, plant P content, and enzyme activities including superoxide dismutase, catalase, peroxidase and ascorbate peroxidase increased considerably by 7.69%-42.9%, whereas electrolyte leakage and malondialdehyde content declined significantly by 28.17%-42.38% relative to drought stress. These changes suggested that strain HX-2 was able to alleviate negative effects of drought stress on plants by producing indoleacetic acid and dissolving phosphate to improve the antioxidant system of plants. This study will provide theoretical reference for cultivation of maize under drought stress
author	Li,Heqin Zhao,Yanming Jiang,Xuwen
author_facet	Li,Heqin Zhao,Yanming Jiang,Xuwen
author_sort	Li,Heqin
title	Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
title_short	Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
title_full	Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
title_fullStr	Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
title_full_unstemmed	Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings
title_sort	seed soaking with bacillus sp. strain hx-2 alleviates negative effects of drought stress on maize seedlings
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000300396
work_keys_str_mv	AT liheqin seedsoakingwithbacillusspstrainhx2alleviatesnegativeeffectsofdroughtstressonmaizeseedlings AT zhaoyanming seedsoakingwithbacillusspstrainhx2alleviatesnegativeeffectsofdroughtstressonmaizeseedlings AT jiangxuwen seedsoakingwithbacillusspstrainhx2alleviatesnegativeeffectsofdroughtstressonmaizeseedlings
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Seed soaking with Bacillus sp. strain HX-2 alleviates negative effects of drought stress on maize seedlings

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