Impact of drought on growth, photosynthesis, osmotic adjustment, and cell wall elasticity in Damask rose

Plant Physiology and Biochemistry : PPB
Hatim Al-YasiKamel Hessini

Abstract

The response of Damask rose to drought and the underlying mechanisms involved are not known. In this study, vegetative, propagated rose plants were grown under control and water-deficit conditions in a greenhouse at Taïf University, south-west of Saudi Arabia. Control plants were irrigated to field capacity (FC), while water-stressed plants were irrigated to either 50% FC (mild stress) or 25% FC (severe stress). After 60 days, leaf, stem and root fresh and dry weights (g plant-1), photosynthetic activity, leaf water potential (Ψw), leaf water content (WC), apoplastic water fraction (AWF), osmotic potential at full turgor (Ψs100) and turgor loss point (Ψs0), cell wall elasticity, osmotic adjustment (OA), and some solutes (K+, Ca2+, Cl-, proline and soluble carbohydrates) were evaluated. Water stress significantly decreased fresh and dry weights of R. damascena and all photosynthetic parameters, apart from leaf temperature, which increased. Severe water stress (25% FC) resulted in more negative Ψs100 and Ψs0 values than the mild water stress and control. The AWF did not significantly change in response to water stress. The leaf bulk modulus of elasticity (ε) increased from 2.5 MPa under well-watered conditions to 2.82 and 3.5 MPa...Continue Reading

Citations

Mar 7, 2021·Plants·David Jiménez-AriasAndrés A Borges
Feb 23, 2021·PeerJ·Muhammad Asyraf Mohd AmnanSetsuko Komatsu
Apr 4, 2021·Plant Physiology and Biochemistry : PPB·Radia LourkistiJérémie Santini
Jun 11, 2021·The Science of the Total Environment·Jianqiang HuoZhishan Zhang

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