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Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L

Hnilickova, Helena ; Kraus, Kamil ; Vachova, Pavla ; Hnilicka, Frantisek

Plants (Basel), 2021-04, Vol.10 (5), p.845 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L
Autor: Hnilickova, Helena ; Kraus, Kamil ; Vachova, Pavla ; Hnilicka, Frantisek
Assuntos: Abiotic stress ; Agricultural production ; Assimilation ; Carbon dioxide ; Conductance ; Crassulacean acid metabolism ; Crops ; Experiments ; Exposure ; gas exchange ; Leaves ; Malondialdehyde ; Medical research ; Photosynthesis ; Photosystem II ; Physiology ; Portulaca oleracea ; Principal components analysis ; Proline ; purslane ; Resistance ; Salinity ; Salinity effects ; Salinity tolerance ; Salt ; salt stress ; Salts ; Sodium chloride ; Stomata ; Stomatal conductance ; Stress ; Water potential
É parte de: Plants (Basel), 2021-04, Vol.10 (5), p.845
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: In this investigation, the effect of salt stress on L. was monitored at salinity levels of 100 and 300 mM NaCl. At a concentration of 100 mM NaCl there was a decrease in stomatal conductance (gs) simultaneously with an increase in CO assimilation (A) at the beginning of salt exposure (day 3). However, the leaf water potential (ψ ), the substomatal concentration of CO (Ci), the maximum quantum yield of photosystem II (Fv/Fm), and the proline and malondialdehyde (MDA) content remained unchanged. Exposure to 300 mM NaCl caused a decrease in gs from day 3 and a decrease in water potential, CO assimilation, and Fv/Fm from day 9. There was a large increase in proline content and a significantly higher MDA concentration on days 6 and 9 of salt stress compared to the control group. After 22 days of exposure to 300 mM NaCl, there was a transition from the C4 cycle to crassulacean acid metabolism (CAM), manifested by a rapid increase in substomatal CO concentration and negative CO assimilation values. These results document the tolerance of to a lower level of salt stress and the possibility of its use in saline localities.
Editor: Switzerland: MDPI AG
Idioma: Inglês

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Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L

Hnilickova, Helena ; Kraus, Kamil ; Vachova, Pavla ; Hnilicka, Frantisek

Switzerland: MDPI AG

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