Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress

The crop water stress index (CWSI), based on canopy temperature (T<sub>c</sub>), has been widely used in evaluating plant water status and planning irrigation scheduling, but whether CWSI can diagnose the stress status of crops and predict the physiological traits and growth under combin...

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Autores principales:	Shujie Gu, Qi Liao, Shaoyu Gao, Shaozhong Kang, Taisheng Du, Risheng Ding
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	canopy temperature non-water-stressed baseline leaf water potential stomatal conductance maize growth yield Science Q
Acceso en línea:	https://doaj.org/article/42e7ddcc28ef4272a5207eec34d5b8af
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spelling	oai:doaj.org-article:42e7ddcc28ef4272a5207eec34d5b8af2021-11-25T18:55:39ZCrop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress10.3390/rs132247102072-4292https://doaj.org/article/42e7ddcc28ef4272a5207eec34d5b8af2021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4710https://doaj.org/toc/2072-4292The crop water stress index (CWSI), based on canopy temperature (T<sub>c</sub>), has been widely used in evaluating plant water status and planning irrigation scheduling, but whether CWSI can diagnose the stress status of crops and predict the physiological traits and growth under combined water and salt stress remains to be further studied. Here, a model of CWSI was established based on the continuous measurements of T<sub>c</sub> for two maize genotypes (ZD958 and XY335) under two water and salt conditions, combined with growth stage-specific non-water-stressed baselines (NWSB). The relationships between physiology, growth, and yield of maize with CWSI were analyzed. There were significant differences in NWSB between the two maize genotypes at the same and different growth stages; thus, growth stage-specific NWSBs were used. The difference in NWSB was due to the difference and change in effective leaf width. CWSI was closely related to leaf water potential, stomatal conductance, and net photosynthetic rate under different water and salt stress, and also explained the variations in leaf area index, biomass, water use, and yield. Collectively, CWSI can be used as a proxy indicator of high-throughput phenotyping maize performance under combined water and salt stress, which will be valuable for predicting yield and improving water use efficiency.Shujie GuQi LiaoShaoyu GaoShaozhong KangTaisheng DuRisheng DingMDPI AGarticlecanopy temperaturenon-water-stressed baselineleaf water potentialstomatal conductancemaize growthyieldScienceQENRemote Sensing, Vol 13, Iss 4710, p 4710 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	canopy temperature non-water-stressed baseline leaf water potential stomatal conductance maize growth yield Science Q
spellingShingle	canopy temperature non-water-stressed baseline leaf water potential stomatal conductance maize growth yield Science Q Shujie Gu Qi Liao Shaoyu Gao Shaozhong Kang Taisheng Du Risheng Ding Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
description	The crop water stress index (CWSI), based on canopy temperature (T<sub>c</sub>), has been widely used in evaluating plant water status and planning irrigation scheduling, but whether CWSI can diagnose the stress status of crops and predict the physiological traits and growth under combined water and salt stress remains to be further studied. Here, a model of CWSI was established based on the continuous measurements of T<sub>c</sub> for two maize genotypes (ZD958 and XY335) under two water and salt conditions, combined with growth stage-specific non-water-stressed baselines (NWSB). The relationships between physiology, growth, and yield of maize with CWSI were analyzed. There were significant differences in NWSB between the two maize genotypes at the same and different growth stages; thus, growth stage-specific NWSBs were used. The difference in NWSB was due to the difference and change in effective leaf width. CWSI was closely related to leaf water potential, stomatal conductance, and net photosynthetic rate under different water and salt stress, and also explained the variations in leaf area index, biomass, water use, and yield. Collectively, CWSI can be used as a proxy indicator of high-throughput phenotyping maize performance under combined water and salt stress, which will be valuable for predicting yield and improving water use efficiency.
format	article
author	Shujie Gu Qi Liao Shaoyu Gao Shaozhong Kang Taisheng Du Risheng Ding
author_facet	Shujie Gu Qi Liao Shaoyu Gao Shaozhong Kang Taisheng Du Risheng Ding
author_sort	Shujie Gu
title	Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
title_short	Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
title_full	Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
title_fullStr	Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
title_full_unstemmed	Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress
title_sort	crop water stress index as a proxy of phenotyping maize performance under combined water and salt stress
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/42e7ddcc28ef4272a5207eec34d5b8af
work_keys_str_mv	AT shujiegu cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress AT qiliao cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress AT shaoyugao cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress AT shaozhongkang cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress AT taishengdu cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress AT rishengding cropwaterstressindexasaproxyofphenotypingmaizeperformanceundercombinedwaterandsaltstress
_version_	1718410520247140352

Crop Water Stress Index as a Proxy of Phenotyping Maize Performance under Combined Water and Salt Stress

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