Relationship between quantum efficiency of PSII and cold-induced plant resistance to fungal pathogens

ek, Agnieszka Pła; Rapacz, Marcin; Hura, Katarzyna

doi:10.1007/s11738-004-0003-1

Cited by 14 publications

(4 citation statements)

References 28 publications

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“…Decrease in F o induced by cold stress was also reported in rape (Plazek et al 2004). The decrease in F o could reflect damage to regulatory processes external to F 680 (reaction center of PSII), such as impairment of the photoprotective processes that facilitates the dissipation of excess energy with the leaf (Angelopoulos et al 1996;Plazek et al 2004). Higher LNT (8, 12°C) affected the maximal fluorescence (F m ) and variable fluorescence (F v ) slightly, whereas 5°C LNT induced obvious decrease in F m and F v in both lines.…”

Section: Resultssupporting

confidence: 58%

“…Contrary to them Rohacek and Bartak maintained that a decrease in F o describes the plant reaction to stress (Rohacek and Bartak 1999). Decrease in F o induced by cold stress was also reported in rape (Plazek et al 2004). The decrease in F o could reflect damage to regulatory processes external to F 680 (reaction center of PSII), such as impairment of the photoprotective processes that facilitates the dissipation of excess energy with the leaf (Angelopoulos et al 1996;Plazek et al 2004).…”

Section: Resultsmentioning

confidence: 92%

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Effects of low night temperature on pigments, chl a fluorescence and energy allocation in two bitter gourd (Momordica charantia L.) genotypes

2008

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Using two different inbred lines of Momordica charantia (bitter gourd), Y-106-5 and Z-1-4, the cell membrane stability, leaf water potential, pigment contents and the chlorophyll a fluorescence were investigated with different low night temperature (LNT) treatments over a 7 day time period and the sequent a 7 day recovery. Under LNT treatments, electrolyte leakage increased in both inbred lines and it increased more significantly in Y-106-5 plants than that in Z-1-4. The content of Chl b and total Chl decreased, while the Chl a/b ratio increased in stressed plants of the two lines. Almost all LNT treatments induced little change in Chl a content in Z-1-4 whereas obvious decreases in 5 and 8°C treated Y-106-5 plants were observed. Chilling changed the water status of plants and induced decreases of leaf water potential (LWP) in 5 and 8°C treated plants. LNT treatments also resulted in changes in the chlorophyll fluorescence parameters in bitter gourd leaves. The potential PSII activity (F v /F o ) was reduced obviously by LNT stress and showed more sensitive to LNT than the maximum quantum efficiency of PSII primary photochemistry (F v /F m ). The efficiency of open PSII centers ðF 0 v =F 0 m Þ exhibited a slight decrease whereas the photochemical quenching efficient (q P ) was affected more seriously by LNT stress in both two inbred lines. The allocation of energy was rearranged by LNT stress. The light fraction used for PSII photochemistry (P) was reduced, while that used for heat dissipation (D) and the third fraction of absorbed light defines excess energy (E) increased due to the chilling stress. The impacts of LNT stress on bitter gourd generally increased with the number of LNT chilling and the severe night chilling. Plants were little affected by 12°C night chilling and the most acute damage was found in 5°C night chilling treatments. A 7 day recovery mitigated the adverse effects of LNT for both lines and almost all LNT treated plants restored to control levels except 5°C night chilling treated Y-106-5 plants. The two lines have a variance in tolerance to LNT stress and display obvious differences of phenotypes under extreme conditions.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 92%

Effects of low night temperature on pigments, chl a fluorescence and energy allocation in two bitter gourd (Momordica charantia L.) genotypes

2008

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“…These results were also consistent with previous studies on biological processes [ 57 , 58 ]. However, there were also many genes enriched in the “plant-interaction” pathway, because low temperature significantly changed the membrane permeability of plants leading to a decrease in plant resistance to pathogens [ 59 ].…”

Section: Discussionmentioning

confidence: 99%

Transcription-associated metabolomic profiling reveals the critical role of frost tolerance in wheat

Dong

Liu

et al. 2022

BMC Plant Biol

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Background Low temperature is a crucial stress factor of wheat (Triticum aestivum L.) and adversely impacts on plant growth and grain yield. Multi-million tons of grain production are lost annually because crops lack the resistance to survive in winter. Particularlly, winter wheat yields was severely damaged under extreme cold conditions. However, studies about the transcriptional and metabolic mechanisms underlying cold stresses in wheat are limited so far. Results In this study, 14,466 differentially expressed genes (DEGs) were obtained between wild-type and cold-sensitive mutants, of which 5278 DEGs were acquired after cold treatment. 88 differential accumulated metabolites (DAMs) were detected, including P-coumaroyl putrescine of alkaloids, D-proline betaine of mino acids and derivativ, Chlorogenic acid of the Phenolic acids. The comprehensive analysis of metabolomics and transcriptome showed that the cold resistance of wheat was closely related to 13 metabolites and 14 key enzymes in the flavonol biosynthesis pathway. The 7 enhanced energy metabolites and 8 up-regulation key enzymes were also compactly involved in the sucrose and amino acid biosynthesis pathway. Moreover, quantitative real-time PCR (qRT-PCR) revealed that twelve key genes were differentially expressed under cold, indicating that candidate genes POD, Tacr7, UGTs, and GSTU6 which were related to cold resistance of wheat. Conclusions In this study, we obtained the differentially expressed genes and differential accumulated metabolites in wheat under cold stress. Using the DEGs and DAMs, we plotted regulatory pathway maps of the flavonol biosynthesis pathway, sucrose and amino acid biosynthesis pathway related to cold resistance of wheat. It was found that candidate genes POD, Tacr7, UGTs and GSTU6 are related to cold resistance of wheat. This study provided valuable molecular information and new genetic engineering clues for the further study on plant resistance to cold stress.

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“…Salinity stress reduced chlorophyll fluorescence Fv / Fm ratio value in the sensitive genotypes. The Fv / Fm ratio measures maximal photochemical efficiency of PSII (Rapacz & Hura, 2004), where damage to PSII (also referred to as photoinhibition) leads to lowering the Fv / Fm value (Adhikari et al, 2019). This parameter seems to be more appropriate as a proxy to measure detrimental effects of salinity on leaf photochemistry, as leaf chlorophyll content (SPAD) data may both decrease (Santos, 2004) and increase (Hasanuzzaman et al, 2018) in chlorophyll content in salt‐treated plants.…”

Section: Discussionmentioning

confidence: 99%

Multidimensional screening and evaluation of morpho‐physiological indices for salinity stress tolerance in wheat

Quamruzzaman

Manik

Livermore

et al. 2022

J Agronomy Crop Science

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Soil salinity is one of the major constraints to crop production worldwide. The multifaceted nature of salinity tolerance traits complicates plant screening and the identification of salt‐tolerant germplasm to be used for the genetic advancement of corps. Many screening criteria have been suggested to distinguish between genotypes. Most of these were applied under controlled environmental conditions and limited to one developmental stage of plants. As a result, most of the reported tolerance could not be validated under field conditions. This study employed a membership function value (MFV) to assess NaCl tolerance of eight wheat (Triticum aestivum) genotypes measured at germination, vegetative and reproductive stages, as an integrative tool for the overall plant performance. Salt stresses had an adverse effect on plant physiological (residual transpiration, stomatal density, chlorophyll fluorescence characteristics; leaf N, Na+ and K+ content) and agronomical (plant height; biomass; root and tiller number; grain) characteristics. Based on this assessment, plants were divided into three contrasting groups: salt tolerant, moderately salt tolerant and salt sensitive. Although genotypes did not show the same degree of tolerance in germination, glasshouse and field experiments, the variety Yu‐07 showed consistently better performance in all trials, whilst Aus19720 was most sensitive in glasshouse and field experiments. These contrasting genotypes could be of a potential value for further studies to uncover the genetic mechanisms governing salt stress response in wheat.

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Relationship between quantum efficiency of PSII and cold-induced plant resistance to fungal pathogens

Abstract: 1 Cor re sponding au thor, De part ment of Plant Phys i ol ogy, Fac ulty of Ag ri cul ture and Eco nom ics, Ag ri cul tural Uni ver sity of Cra cow,.pl 2 De part ment of Plant Phys i ol ogy, Fac ulty of Ag ri cul ture and Eco nom ics, Ag ri cul tural Uni ver sity of Cra cow,

Cited by 14 publications

References 28 publications

Effects of low night temperature on pigments, chl a fluorescence and energy allocation in two bitter gourd (Momordica charantia L.) genotypes

Effects of low night temperature on pigments, chl a fluorescence and energy allocation in two bitter gourd (Momordica charantia L.) genotypes

Transcription-associated metabolomic profiling reveals the critical role of frost tolerance in wheat

Multidimensional screening and evaluation of morpho‐physiological indices for salinity stress tolerance in wheat

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