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Freezing Tolerance of Lolium multiflorum/Festuca arundinacea Introgression Forms is Associated with the High Activity of Antioxidant System and Adjustment of Photosynthetic Activity under Cold Acclimation.


ABSTRACT: Though winter-hardiness is a complex trait, freezing tolerance was proved to be its main component. Species from temperate regions acquire tolerance to freezing in a process of cold acclimation, which is associated with the exposure of plants to low but non-freezing temperatures. However, mechanisms of cold acclimation in Lolium-Festuca grasses, important for forage production in Europe, have not been fully recognized. Thus, two L. multiflorum/F. arundinacea introgression forms with distinct freezing tolerance were used herein as models in the comprehensive research to dissect these mechanisms in that group of plants. The work was focused on: (i) analysis of cellular membranes' integrity; (ii) analysis of plant photosynthetic capacity (chlorophyll fluorescence; gas exchange; gene expression, protein accumulation, and activity of selected enzymes of the Calvin cycle); (iii) analysis of plant antioxidant capacity (reactive oxygen species generation; gene expression, protein accumulation, and activity of selected enzymes); and (iv) analysis of Cor14b accumulation, under cold acclimation. The more freezing tolerant introgression form revealed a higher integrity of membranes, an ability to cold acclimate its photosynthetic apparatus and higher water use efficiency after three weeks of cold acclimation, as well as a higher capacity of the antioxidant system and a lower content of reactive oxygen species in low temperature.

SUBMITTER: Augustyniak A 

PROVIDER: S-EPMC7460622 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Freezing Tolerance of <i>Lolium multiflorum/Festuca arundinacea</i> Introgression Forms is Associated with the High Activity of Antioxidant System and Adjustment of Photosynthetic Activity under Cold Acclimation.

Augustyniak Adam A   Pawłowicz Izabela I   Lechowicz Katarzyna K   Izbiańska-Jankowska Karolina K   Arasimowicz-Jelonek Magdalena M   Rapacz Marcin M   Perlikowski Dawid D   Kosmala Arkadiusz A  

International journal of molecular sciences 20200817 16


Though winter-hardiness is a complex trait, freezing tolerance was proved to be its main component. Species from temperate regions acquire tolerance to freezing in a process of cold acclimation, which is associated with the exposure of plants to low but non-freezing temperatures. However, mechanisms of cold acclimation in <i>Lolium-Festuca</i> grasses, important for forage production in Europe, have not been fully recognized. Thus, two <i>L. multiflorum/F. arundinacea</i> introgression forms wit  ...[more]

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