High Sugar Concentration Inhibits TOR Signaling Pathway in Arabidopsis thaliana

Pereyra, Cintia M.; Parola, Rodrigo; Lando, Ana Paula; Rodríguez, Marianela; Martínez-Noël, Giselle

doi:10.1007/s00344-022-10894-w

Cited by 5 publications

(2 citation statements)

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“…In addition, the process of photosynthesis is not entirely synchronized with the demands of carbon sinks, thereby indicating that trees possess the ability to accumulate non-structural carbohydrates (NSC), for instance, soluble sugars and starch within their tissues [ 26 ]. Sugars as key signaling and balancing molecules have been shown to modulate stress response [ 27 ], growth and development [ 28 ], and PSMs synthesis [ 29 ], and it is implicated in indirect antioxidant mechanisms against ROS [ 30 , 31 ]. Sugars can protect plant cells against the impact of ROS by acting as both compatible solutes and direct scavengers [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Changes in Biologically Active Compounds in Pinus sylvestris Needles after Lymantria monacha Outbreaks and Treatment with Foray 76B

Čėsna,

Čėsnienė,

Sirgedaitė-Šėžienė

et al. 2024

Plants

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Due to climate warming, the occurrence of Lymantria monacha outbreaks is predicted to become more frequent, causing repeated and severe damage to conifer trees. Currently, the most effective way to control the outbreaks is aerial spraying with the bioinsecticide Foray 76B. The present study aimed to determine the impact of both: (i) L. monacha outbreaks and (ii) treatment with Foray 76B on tree resistance through the synthesis of polyphenols (TPC), flavonoids (TFC), photosynthetic pigments (chlorophyll a and b, carotenoids), lipid peroxidation (MDA), and soluble sugars (TSS) in Pinus sylvestris needles. Samples were collected from visually healthy (control), damaged/untreated, and damaged/Foray 76B-treated plots in 2020 and 2021 (following year after the outbreaks). The results revealed that L. monacha outbreaks contributed to the increase in TPC by 34.1% in 2020 and 26.7% in 2021. TFC negatively correlated with TPC, resulting in 17.6% and 11.1% lower concentrations in L. monacha-damaged plots in 2020 and 2021, respectively. A decrease in MDA was found in the damaged plots in both 2020 and 2021 (10.2% and 23.3%, respectively), which was associated with the increased synthesis of photosynthetic pigments in 2021. The research results also showed that in the following year after the outbreaks, the increase in the synthesis of photosynthetic pigments was also affected by the treatment with Foray 76B. Moreover, the increase in the synthesis of TPC and photosynthetic pigments in the damaged plots in 2021 illustrates the ability of pines to keep an activated defense system to fight biotic stress. Meanwhile, a higher synthesis of photosynthetic pigments in Foray 76B-treated plots indicates a possible effect of the treatment on faster tree growth and forest recovery after L. monacha outbreaks.

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Section: Introductionmentioning

confidence: 99%

“…Sugars can protect plant cells against the impact of ROS by acting as both compatible solutes and direct scavengers [ 31 ]. They also serve as the primary source of energy and carbon skeletons for producing the metabolites essential for both enzymatic and non-enzymatic antioxidant responses [ 30 ].…”

Section: Introductionmentioning

confidence: 99%