Screening Tunisian natural population of Brachypodium hybridum for drought stress at germination and vegetative stages: insight into potential sources of variability for drought adaptation in Brachypodium hybridum.

Bibliographic Details
Title:	Screening Tunisian natural population of Brachypodium hybridum for drought stress at germination and vegetative stages: insight into potential sources of variability for drought adaptation in Brachypodium hybridum.
Authors:	Ibrahim, Yosra, Ellouzi, Hasna, Abdelly, Chedly, Taamalli, Wael, Gandour, Mhemmed
Source:	Cereal Research Communications; Sep2024, Vol. 52 Issue 3, p1001-1013, 13p
Subject Terms:	OXIDATIVE stress, AGRICULTURAL development, AGRICULTURAL productivity, BRACHYPODIUM, DROUGHTS, DROUGHT management
Abstract:	Water deficiency has become a serious ecological problem facing all mankind, and drought has become a key factor constraining the development of agricultural production. Gaining insights into drought response mechanisms is vital for crop adaptation. We present, here, a multifactorial study from germination to vegetative drought stages in the model plant Brachypodium hybridum. A total of 200 genotypes representing 10 natural populations (Fayedh, Enfidha, Jbel Zaghouan, Haouaria, Raouad, Sejnen, Ain Drahem, El Kef, Daouar El Hej Wniss and Djerba) which represent almost all the bioclimatic regions in Tunisia were used. High variation in germination capacity under drought stress was found between studied populations. It reaches 100% at 250 mV for Djerba population and decrease up to 40% at 100 mV. Drought caused significant increase in oxidative stress. Interestingly, genotype 8/14 originated from El Kef exhibited the highest leaf H2O2 content, resulting in higher leaf MDA accumulation. Consistently, no significant changes were observed in-SOD, CAT and GPX activities in both leaves and roots, relatively to unstressed state. Different profile was recorded in 6/9 originated from Raoued in which the most pronounced levels of H2O2 and MDA were observed in drought stressed roots. Concurrently, root CAT activity increased by 22-fold relatively to unstressed plants. Drought stress resulted in a decrease in H2O2 content, mitigation of lipid peroxidation in both leaves and roots of 6/5 genotype originated from Raoued, with a simultaneous increase in leaf and root SOD activity. This was associated with enhanced GPX activity where 75 and 40% of increase were recorded in genotype 6/5 in leaves and roots. [ABSTRACT FROM AUTHOR]
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Database:	Complementary Index

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Items	– Name: Title Label: Title Group: Ti Data: Screening Tunisian natural population of Brachypodium hybridum for drought stress at germination and vegetative stages: insight into potential sources of variability for drought adaptation in Brachypodium hybridum. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ibrahim%2C+Yosra%22">Ibrahim, Yosra</searchLink><br /><searchLink fieldCode="AR" term="%22Ellouzi%2C+Hasna%22">Ellouzi, Hasna</searchLink><br /><searchLink fieldCode="AR" term="%22Abdelly%2C+Chedly%22">Abdelly, Chedly</searchLink><br /><searchLink fieldCode="AR" term="%22Taamalli%2C+Wael%22">Taamalli, Wael</searchLink><br /><searchLink fieldCode="AR" term="%22Gandour%2C+Mhemmed%22">Gandour, Mhemmed</searchLink> – Name: TitleSource Label: Source Group: Src Data: Cereal Research Communications; Sep2024, Vol. 52 Issue 3, p1001-1013, 13p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22OXIDATIVE+stress%22">OXIDATIVE stress</searchLink><br /><searchLink fieldCode="DE" term="%22AGRICULTURAL+development%22">AGRICULTURAL development</searchLink><br /><searchLink fieldCode="DE" term="%22AGRICULTURAL+productivity%22">AGRICULTURAL productivity</searchLink><br /><searchLink fieldCode="DE" term="%22BRACHYPODIUM%22">BRACHYPODIUM</searchLink><br /><searchLink fieldCode="DE" term="%22DROUGHTS%22">DROUGHTS</searchLink><br /><searchLink fieldCode="DE" term="%22DROUGHT+management%22">DROUGHT management</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Water deficiency has become a serious ecological problem facing all mankind, and drought has become a key factor constraining the development of agricultural production. Gaining insights into drought response mechanisms is vital for crop adaptation. We present, here, a multifactorial study from germination to vegetative drought stages in the model plant Brachypodium hybridum. A total of 200 genotypes representing 10 natural populations (Fayedh, Enfidha, Jbel Zaghouan, Haouaria, Raouad, Sejnen, Ain Drahem, El Kef, Daouar El Hej Wniss and Djerba) which represent almost all the bioclimatic regions in Tunisia were used. High variation in germination capacity under drought stress was found between studied populations. It reaches 100% at 250 mV for Djerba population and decrease up to 40% at 100 mV. Drought caused significant increase in oxidative stress. Interestingly, genotype 8/14 originated from El Kef exhibited the highest leaf H<subscript>2</subscript>O<subscript>2</subscript> content, resulting in higher leaf MDA accumulation. Consistently, no significant changes were observed in-SOD, CAT and GPX activities in both leaves and roots, relatively to unstressed state. Different profile was recorded in 6/9 originated from Raoued in which the most pronounced levels of H<subscript>2</subscript>O<subscript>2</subscript> and MDA were observed in drought stressed roots. Concurrently, root CAT activity increased by 22-fold relatively to unstressed plants. Drought stress resulted in a decrease in H<subscript>2</subscript>O<subscript>2</subscript> content, mitigation of lipid peroxidation in both leaves and roots of 6/5 genotype originated from Raoued, with a simultaneous increase in leaf and root SOD activity. This was associated with enhanced GPX activity where 75 and 40% of increase were recorded in genotype 6/5 in leaves and roots. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Cereal Research Communications is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo	BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s42976-023-00447-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1001 Subjects: – SubjectFull: OXIDATIVE stress Type: general – SubjectFull: AGRICULTURAL development Type: general – SubjectFull: AGRICULTURAL productivity Type: general – SubjectFull: BRACHYPODIUM Type: general – SubjectFull: DROUGHTS Type: general – SubjectFull: DROUGHT management Type: general Titles: – TitleFull: Screening Tunisian natural population of Brachypodium hybridum for drought stress at germination and vegetative stages: insight into potential sources of variability for drought adaptation in Brachypodium hybridum. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ibrahim, Yosra – PersonEntity: Name: NameFull: Ellouzi, Hasna – PersonEntity: Name: NameFull: Abdelly, Chedly – PersonEntity: Name: NameFull: Taamalli, Wael – PersonEntity: Name: NameFull: Gandour, Mhemmed IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 01333720 Numbering: – Type: volume Value: 52 – Type: issue Value: 3 Titles: – TitleFull: Cereal Research Communications Type: main
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