Growth chamber and field evaluation of physiological factors of two watermelon genotypes

Drought is a major threat to food security worldwide, and drought-tolerant plants are a convenient model to study the mechanisms underlying drought tolerance. Some of the studies on drought tolerance mechanisms have been performed under controlled environments, while others have been undertaken unde...

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Autores principales:	Goitseone Malambane, Utlwang Batlang, Kelebonye Ramolekwa, Hisashi Tsujimoto, Kinya Akashi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Wildtype watermelon Controlled environment Drought stress CO2 assimilation Chlorophyll fluorescence Natural environment Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/994f32f62e014cdeaebdc53f7f56f762
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id	oai:doaj.org-article:994f32f62e014cdeaebdc53f7f56f762
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spelling	oai:doaj.org-article:994f32f62e014cdeaebdc53f7f56f7622021-12-04T04:36:32ZGrowth chamber and field evaluation of physiological factors of two watermelon genotypes2667-064X10.1016/j.stress.2021.100017https://doaj.org/article/994f32f62e014cdeaebdc53f7f56f7622021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667064X21000166https://doaj.org/toc/2667-064XDrought is a major threat to food security worldwide, and drought-tolerant plants are a convenient model to study the mechanisms underlying drought tolerance. Some of the studies on drought tolerance mechanisms have been performed under controlled environments, while others have been undertaken under natural field conditions; nevertheless, it is important to evaluate the similarities and differences between the results obtained in each case. In this study, the physiological responses of a drought-tolerant wildtype and a drought-susceptible watermelon cultivar were evaluated under both natural and artificial environments. Although different in intensity, the trend of physiological responses was similar in both environments. After five days of exposure to drought, the wildtype showed a sharper decline (80.91%) in CO2 assimilation in the field than in a growth chamber (65.81%). The non-photochemical quenching (NPQ) parameters showed lower values in the cultivar than in the wildtype, regardless of growth environment; additionally, final NPQ values recorded for the wildtype were significantly higher in field plants than in those grown in a growth chamber. Regression analysis showed a highly significant correlation between NPQ and photosynthesis in the wildtype in both environments, while the relationships were non-significant in field-cultivated watermelon. These findings demonstrate that artificial conditions can be used to study the trends of plant responses to environmental stress, but results must be interpreted with caution.Goitseone MalambaneUtlwang BatlangKelebonye RamolekwaHisashi TsujimotoKinya AkashiElsevierarticleWildtype watermelonControlled environmentDrought stressCO2 assimilationChlorophyll fluorescenceNatural environmentPlant ecologyQK900-989ENPlant Stress, Vol 2, Iss , Pp 100017- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Wildtype watermelon Controlled environment Drought stress CO2 assimilation Chlorophyll fluorescence Natural environment Plant ecology QK900-989
spellingShingle	Wildtype watermelon Controlled environment Drought stress CO2 assimilation Chlorophyll fluorescence Natural environment Plant ecology QK900-989 Goitseone Malambane Utlwang Batlang Kelebonye Ramolekwa Hisashi Tsujimoto Kinya Akashi Growth chamber and field evaluation of physiological factors of two watermelon genotypes
description	Drought is a major threat to food security worldwide, and drought-tolerant plants are a convenient model to study the mechanisms underlying drought tolerance. Some of the studies on drought tolerance mechanisms have been performed under controlled environments, while others have been undertaken under natural field conditions; nevertheless, it is important to evaluate the similarities and differences between the results obtained in each case. In this study, the physiological responses of a drought-tolerant wildtype and a drought-susceptible watermelon cultivar were evaluated under both natural and artificial environments. Although different in intensity, the trend of physiological responses was similar in both environments. After five days of exposure to drought, the wildtype showed a sharper decline (80.91%) in CO2 assimilation in the field than in a growth chamber (65.81%). The non-photochemical quenching (NPQ) parameters showed lower values in the cultivar than in the wildtype, regardless of growth environment; additionally, final NPQ values recorded for the wildtype were significantly higher in field plants than in those grown in a growth chamber. Regression analysis showed a highly significant correlation between NPQ and photosynthesis in the wildtype in both environments, while the relationships were non-significant in field-cultivated watermelon. These findings demonstrate that artificial conditions can be used to study the trends of plant responses to environmental stress, but results must be interpreted with caution.
format	article
author	Goitseone Malambane Utlwang Batlang Kelebonye Ramolekwa Hisashi Tsujimoto Kinya Akashi
author_facet	Goitseone Malambane Utlwang Batlang Kelebonye Ramolekwa Hisashi Tsujimoto Kinya Akashi
author_sort	Goitseone Malambane
title	Growth chamber and field evaluation of physiological factors of two watermelon genotypes
title_short	Growth chamber and field evaluation of physiological factors of two watermelon genotypes
title_full	Growth chamber and field evaluation of physiological factors of two watermelon genotypes
title_fullStr	Growth chamber and field evaluation of physiological factors of two watermelon genotypes
title_full_unstemmed	Growth chamber and field evaluation of physiological factors of two watermelon genotypes
title_sort	growth chamber and field evaluation of physiological factors of two watermelon genotypes
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/994f32f62e014cdeaebdc53f7f56f762
work_keys_str_mv	AT goitseonemalambane growthchamberandfieldevaluationofphysiologicalfactorsoftwowatermelongenotypes AT utlwangbatlang growthchamberandfieldevaluationofphysiologicalfactorsoftwowatermelongenotypes AT kelebonyeramolekwa growthchamberandfieldevaluationofphysiologicalfactorsoftwowatermelongenotypes AT hisashitsujimoto growthchamberandfieldevaluationofphysiologicalfactorsoftwowatermelongenotypes AT kinyaakashi growthchamberandfieldevaluationofphysiologicalfactorsoftwowatermelongenotypes
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Growth chamber and field evaluation of physiological factors of two watermelon genotypes

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