24-epibrassinolide improved chilled tomato photosyntheticperformance by stabilizing electron transport chain and function of photosystem II

Hu, Wenhai; Hu, Xinjiang; LIU, C.; WANG, B.-Q.; Yan, Xiaohong

doi:10.32615/bp.2022.008

Cited by 1 publication

(1 citation statement)

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“…Later, with the onset of cold weather, the efficiency of the acceptor side of PS II and then the donor side of PS II decreased as a result of photoinhibition and photooxidative stress. In previous studies, cold stress was previously shown to inhibit linear electron transport, whereas cyclic electron transport around PS I was enhanced, which contributes to the adaptive biochemical changes that occur as a result of walking stress [ 40 ]. The general change in the photosynthetic activity of leaves and the accumulation of protector substances (sugars) in oat leaves are in good agreement with the decrease in the reflection index (PRI), which in turn can serve as a good indicator of possible rearrangements in the photochemical processes and biochemical composition of leaves.…”

Section: Discussionmentioning

confidence: 99%

Metabolomic Profile and Functional State of Oat Plants (Avena sativa L.) Sown under Low-Temperature Conditions in the Cryolithozone

Nokhsorov,

Protopopov,

Sleptsov

et al. 2024

Plants

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Oats are one of the most useful and widespread cereal crops in the world. In permafrost conditions (Central Yakutia), based on metabolic changes in late summer-sown oat plants (Avena sativa L.), the key processes involved in the cold acclimation of a valuable cereal species were identified. During the onset of low ambient temperatures, metabolites from leaf samples were profiled using gas chromatography with mass spectrometry (GC-MS) and were analyzed using principal component analysis (PCA). A total of 41 metabolites were identified in oat leaves. It was found that acclimation to suboptimal temperatures during the fall period leads to biochemical (accumulation of mono- and disaccharides and decrease in fatty acids and polyols) as well as physiological and biophysical changes (decrease in leaf PRI reflectance indices and chlorophyll a fluorescence). Therefore, the study contributes to a more holistic understanding of oat metabolism under low-temperature cryolithozone stress. It is believed that the analysis of changes in leaf reflection properties and JIP-test parameters of chlorophyll a fluorescence using leaf metabolomic profiling can be used in the selection of valuable varieties of cereal crops to obtain plant fodders with high nutrient contents under conditions of a sharply continental climate.

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Section: Discussionmentioning

confidence: 99%