干旱区生态环境知识资源中心(Arid): Effects of drought stress induced by D-Mannitol on the germination and early seedling growth traits, physiological parameters and phytochemicals content of Tunisian squash (Cucurbita maximaDuch.) landraces

Arid

DOI	10.3389/fpls.2023.1215394
	Effects of drought stress induced by D-Mannitol on the germination and early seedling growth traits, physiological parameters and phytochemicals content of Tunisian squash (Cucurbita maximaDuch.) landraces
	Saadaoui, Wassim; Tarchoun, Neji; Msetra, Insaf; Pavli, Ourania; Falleh, Hanen; Ayed, Chadha; Amami, Roua; Ksouri, Riadh; Petropoulos, Spyridon A.
通讯作者	Tarchoun, N
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2023
卷号	14
英文摘要	IntroductionDrought stress is one of the most devastating environmental stressors, especially in the arid and semi-arid regions of the world. Considering the major constraints that drought stress poses to crop production and the consequent yield losses in food crops, breeding for climate-resilient crops is an efficient means to mitigate stress conditions. Materials and methodsThis study aimed at evaluating the response of four squash (Cucurbita maxima Duchesne) landraces to drought stress at germination and at plant stage. Drought stress was induced by different concentrations of D-mannitol (-0.24, -0.47 and -0.73 MPa). The tested parameters at germination stage included germination percentage, seedling vigor index, seed water absorbance and seedling growth potential. At the plant stage, leaf chlorophyll and carotenoids content, chlorophyll fluorescence, evapotranspiration, photosynthesis activity and several biomarkers, namely malondialdehyde, proline, total phenols content, total flavonoids content and DPPH radical scavenging activity were evaluated in both roots and leaves. Results and discussionOur results indicate a magnitude of drought stress effects reflected via repression of germination and seedling growth as well as adjustments in physiological functions at later growth stages, in a genotype depended manner. Among landraces, 751 and 746 showed better performance, as evidenced by higher seed germination and seedling growth potential even at high stress levels (-0.47 and - 0.73 MPa), whereas 747 was the most sensitive landrace to drought stress at both tested stages. In conclusion, our findings highlight the importance of squash landraces selection for the identification of elite genotypes with increased tolerance to drought stress.
英文关键词	water stress Cucurbita maxima Duchesne seed germination seedling vigor total phenols content chlorophyll fluorescence carotenoids
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:001047861400001
WOS关键词	WATER-STRESS ; MECHANISMS ; PHOTOSYNTHESIS ; ACCUMULATION ; FLUORESCENCE ; RESISTANCE ; YIELD ; WHEAT ; SALT ; L.
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396606
推荐引用方式 GB/T 7714	Saadaoui, Wassim,Tarchoun, Neji,Msetra, Insaf,et al. Effects of drought stress induced by D-Mannitol on the germination and early seedling growth traits, physiological parameters and phytochemicals content of Tunisian squash (Cucurbita maximaDuch.) landraces[J],2023,14.
APA	Saadaoui, Wassim.,Tarchoun, Neji.,Msetra, Insaf.,Pavli, Ourania.,Falleh, Hanen.,...&Petropoulos, Spyridon A..(2023).Effects of drought stress induced by D-Mannitol on the germination and early seedling growth traits, physiological parameters and phytochemicals content of Tunisian squash (Cucurbita maximaDuch.) landraces.FRONTIERS IN PLANT SCIENCE,14.
MLA	Saadaoui, Wassim,et al."Effects of drought stress induced by D-Mannitol on the germination and early seedling growth traits, physiological parameters and phytochemicals content of Tunisian squash (Cucurbita maximaDuch.) landraces".FRONTIERS IN PLANT SCIENCE 14(2023).