Effects of low-temperature hardening on the biochemical response of winter oilseed rape seedlings inoculated with the spores of Leptosphaeria maculans

Hura, Katarzyna; Hura, Tomasz; Rapacz, Marcin; Płażek, Agnieszka

doi:10.1515/biolog-2015-0129

Cited by 3 publications

(2 citation statements)

References 57 publications

(49 reference statements)

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“…The hormone profiles are in accordance with the expression patterns of their biosynthetic genes; strong stimulation was detected in the case of SA-related gene PAL and, to lesser extent, of JA-related gene LOX . This is in accordance with previous reports, which showed that low temperature or cold acclimation usually results in elevated PAL activity, e.g., in festulolium or rape plants [ 97 , 98 ]. Most likely, the plantlets prioritize keeping their defense mechanisms alert against extreme environmental conditions in this developmental stage.…”

Section: Discussionsupporting

confidence: 93%

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

et al. 2021

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Cold acclimation, the necessary prerequisite for promotion of freezing tolerance, is affected by both low temperature and enhanced far-red/red light (FR/R) ratio. The impact of FR supplementation to white light, created by artificial LED light sources, on the hormone levels, metabolism, and expression of the key hormone metabolism-related genes was determined in winter barley at moderate (15 °C) and low (5 °C) temperature. FR-enhanced freezing tolerance at 15 °C was associated with promotion of abscisic acid (ABA) levels, and accompanied by a moderate increase in indole-3-acetic acid (IAA) and cis-zeatin levels. The most prominent impact on the plants’ freezing tolerance was found after FR pre-treatment at 15 °C (for 10 days) followed by cold treatment at FR supplementation (7 days). The response of ABA was diminished in comparison with white light treatment, probably due to the elevation of stress tolerance during FR pre-treatment. Jasmonic acid (JA) and salicylic acid (SA) were transiently reduced. When the plants were exposed directly to a combination of cold (5 °C) and FR supplementation, ABA increase was higher than in white light, and was associated with enhanced elevation of JA and, in the longer term (after 7 days), with IAA and cis-zeatin increase, which indicates a stronger stress response and better acclimation. Cold hardening was more efficient when FR light was applied in the early developmental stage of the barley plants (three-leaf stage, 18 days), rather than in later stages (28-days). The dynamics of the phytohormone changes are well supported by the expression profiles of the key hormone metabolism-related genes. This series of treatments serves as evidence for the close relationship between plant hormones, light quality, and low temperature at the beginning of cold acclimation. Besides the timing of the FR treatments, plant age also represents a key factor during light spectrum-dependent cold acclimation.

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Section: Discussionsupporting

confidence: 93%

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

et al. 2021

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“…Previous studies showed that slightly elevated temperature could enhance secondary metabolites such as saponins, phenolic compounds, and flavonoids [39,40]. Adversely, some research argued that the total polyphenol and anthocyanin (one kind of flavonoids) were the higher in low temperature rather than high temperature [29,41]. Thus further studies are still necessary.…”

Section: Introductionmentioning

confidence: 99%

Growth and Physiological Responses of Adenophora triphylla (Thunb.) A.DC. Plug Seedlings to Day and Night Temperature Regimes

Ren

Jeong

et al. 2018

Agronomy

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Adenophora triphylla (Thunb.) A.DC., three-leaf lady bell, is an important medicinal plant used against cancers and obesity. It has been well-established that the temperature regime affects plant growth and development in many ways. However, there is no study available correlating the growth of A. triphylla seedlings with different day and night temperature regimes. In order to find an optimal temperature regime, growth and physiology were investigated in A. triphylla plug seedlings grown in environment-controlled chambers at different day and night temperatures: 20/20 °C (day/night) (TA), 25/15 °C (TB), and 20/15 °C (TC). The seedlings in plug trays were grown under a light intensity of 150 μmol·m−2·s−1 PPFD (photosynthetic photon flux density) provided by white LEDs, a 70% relative humidity, and a 16 h (day)/8 h (night) photoperiod for six weeks. The results showed that the stem diameter, number of roots, and biomass were significantly larger for seedlings in TB than those in TA or TC. Moreover, the contents of total flavonoid, total phenol, and soluble sugar in seedlings grown in TB were markedly higher than those in seedlings in the other two treatments. Soluble protein content was the lowest in seedlings in TC, while starch content was the lowest in seedlings grown in TA. Furthermore, seedlings grown in TB showed significantly lower activities of antioxidant enzymes such as superoxide dismutase, catalase, ascorbate peroxidase, and guaiacol peroxidase. Native PAGE (polyacrylamide gel electrophoresis) analysis further proved low activities of antioxidant isozymes in TB treatment. Meanwhile, the lowest content of hydrogen peroxide was observed in seedlings grown in TB. In conclusion, the results suggested that the 25/15 °C (day/night) temperature regime is the most suitable for the growth and physiological development of A. triphylla seedlings.

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Hardening Pretreatment by Drought and Low Temperature Enhanced Chilling Stress Tolerance of Cucumber Seedlings

Ghanbari

Kordi

2019

asphc

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Chilling stress is of major limiting factors influencing the growth and development of warm-season crops like cucumber. In this research, the possibility of chilling tolerance of cucumber seedlings was investigated through employing the drought and low-temperature pretreatments. The factorial experiment consisted of two factors including cucumber cultivars (i.e. ‘Super Dominos’ and ‘Super Star’) and hardening treatments (control, low temperatures at 10°C, and 15°C and drought simulated by 10% and 20% PEG) based on completely randomized design (CRD) in 3 replications. After applying treatments and providing them 48 h opportunity to be recovered, the seedlings were subjected to 3°C for a six-day period and 6 h for each day. All hardening treatments improved seedlings’ growth, chlorophyll content, total phenol (TP) and antioxidant enzyme activities, while reducing chilling injury index and malondialdehyde (MDA) content. Comparing to temperature hardening, the drought pretreatment showed to have a better effect on inducing the chilling tolerance into cultivars. Overall, the results of this experiment showed that employing drought and low-temperature pretreatments enabled cucumber seedlings to mitigate the harmful effects of chilling.

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Effects of low-temperature hardening on the biochemical response of winter oilseed rape seedlings inoculated with the spores of Leptosphaeria maculans

Cited by 3 publications

References 57 publications

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

Growth and Physiological Responses of Adenophora triphylla (Thunb.) A.DC. Plug Seedlings to Day and Night Temperature Regimes

Hardening Pretreatment by Drought and Low Temperature Enhanced Chilling Stress Tolerance of Cucumber Seedlings

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