Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors

ABSTRACT Recent global warming has increased the risk of heat stress which may adversely affect crop productivity worldwide. Higher temperature during reproductive stage is one of major constraint that adversely affects grain filling and seed setting in spring maize (Zea mays L.) The purpose of this...

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Autores principales:	Iqbal,Hassan, Yaning,Chen, Rehman,Hafeez ur, Waqas,Muhammad, Ahmed,Zeeshan, Raza,Syed Turab, Shareef,Muhammad
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2020
Materias:	Global warming heat stress maize Moringa oleifera priming techniques salicylic acid.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000100030
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spelling	oai:scielo:S0718-583920200001000302020-02-25Improving heat stress tolerance in late planted spring maize by using different exogenous elicitorsIqbal,HassanYaning,ChenRehman,Hafeez urWaqas,MuhammadAhmed,ZeeshanRaza,Syed TurabShareef,Muhammad Global warming heat stress maize Moringa oleifera priming techniques salicylic acid. ABSTRACT Recent global warming has increased the risk of heat stress which may adversely affect crop productivity worldwide. Higher temperature during reproductive stage is one of major constraint that adversely affects grain filling and seed setting in spring maize (Zea mays L.) The purpose of this study was to evaluate the potential of different elicitors (salicylic acid, CaCl2, Moringa oleifera Lam. leaf extract) to improve yield performance of heat stressed spring maize. Seed priming techniques (hydropriming, osmopriming, organic priming and hormonal priming) were used to investigate the impact of exogenous elicitors on physiological, biochemical and yield-related attributes of late planted spring maize. Results revealed that higher temperature at maturity caused membrane leakage, reduced photosynthetic pigments and net assimilation rate which ultimately led to decreased grain yield. However, exogenous elicitors improved emergence characteristics and triggered early seedling development, and exhibited significantly higher seedling chlorophyll contents than control plants. Among elicitors, salicylic acid (SA) exhibited significantly higher photosynthetic pigment (17%), membrane stability index (26%), relative water content (16%), crop growth rate (13%), net assimilation rate (29%), grain yield (27%), biological yield (14%), harvest index (9%) and grain protein (28%) as compared to control in late planted spring maize. The multivariate analysis also indicate that physio-biochemical traits were more pronounced in hormonal priming with SA as compared to other exogenous elicitors. In conclusion, application of exogenous elicitors like SA is most effective and easy approach that may help to improve crop performance with increased grain yield and quality in late planted spring maize that prone to high temperature.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.80 n.1 20202020-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000100030en10.4067/S0718-58392020000100030
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Global warming heat stress maize Moringa oleifera priming techniques salicylic acid.
spellingShingle	Global warming heat stress maize Moringa oleifera priming techniques salicylic acid. Iqbal,Hassan Yaning,Chen Rehman,Hafeez ur Waqas,Muhammad Ahmed,Zeeshan Raza,Syed Turab Shareef,Muhammad Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
description	ABSTRACT Recent global warming has increased the risk of heat stress which may adversely affect crop productivity worldwide. Higher temperature during reproductive stage is one of major constraint that adversely affects grain filling and seed setting in spring maize (Zea mays L.) The purpose of this study was to evaluate the potential of different elicitors (salicylic acid, CaCl2, Moringa oleifera Lam. leaf extract) to improve yield performance of heat stressed spring maize. Seed priming techniques (hydropriming, osmopriming, organic priming and hormonal priming) were used to investigate the impact of exogenous elicitors on physiological, biochemical and yield-related attributes of late planted spring maize. Results revealed that higher temperature at maturity caused membrane leakage, reduced photosynthetic pigments and net assimilation rate which ultimately led to decreased grain yield. However, exogenous elicitors improved emergence characteristics and triggered early seedling development, and exhibited significantly higher seedling chlorophyll contents than control plants. Among elicitors, salicylic acid (SA) exhibited significantly higher photosynthetic pigment (17%), membrane stability index (26%), relative water content (16%), crop growth rate (13%), net assimilation rate (29%), grain yield (27%), biological yield (14%), harvest index (9%) and grain protein (28%) as compared to control in late planted spring maize. The multivariate analysis also indicate that physio-biochemical traits were more pronounced in hormonal priming with SA as compared to other exogenous elicitors. In conclusion, application of exogenous elicitors like SA is most effective and easy approach that may help to improve crop performance with increased grain yield and quality in late planted spring maize that prone to high temperature.
author	Iqbal,Hassan Yaning,Chen Rehman,Hafeez ur Waqas,Muhammad Ahmed,Zeeshan Raza,Syed Turab Shareef,Muhammad
author_facet	Iqbal,Hassan Yaning,Chen Rehman,Hafeez ur Waqas,Muhammad Ahmed,Zeeshan Raza,Syed Turab Shareef,Muhammad
author_sort	Iqbal,Hassan
title	Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
title_short	Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
title_full	Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
title_fullStr	Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
title_full_unstemmed	Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
title_sort	improving heat stress tolerance in late planted spring maize by using different exogenous elicitors
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000100030
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Improving heat stress tolerance in late planted spring maize by using different exogenous elicitors

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