scholarly journals Response of Chloroplast NAD(P)H Dehydrogenase-Mediated Cyclic Electron Flow to a Shortage or Lack in Ferredoxin-Quinone Oxidoreductase-Dependent Pathway in Rice Following Short-Term Heat Stress

2016 ◽  
Vol 7 ◽  
Author(s):  
Jemaa Essemine ◽  
Mingnan Qu ◽  
Hualing Mi ◽  
Xin-Guang Zhu
Keyword(s):  
Heat Stress ◽  
Electron Flow ◽  
Cyclic Electron Flow ◽  
Short Term ◽  
Quinone Oxidoreductase ◽  
Dependent Pathway

Induction of cyclic electron flow around photosystem I during heat stress in grape leaves

Plant Science ◽  
2017 ◽  
Vol 256 ◽  
pp. 65-71 ◽  
Author(s):  
Yongjiang Sun ◽  
Qingwei Geng ◽  
Yuanpeng Du ◽  
Xinghong Yang ◽  
Heng Zhai
Keyword(s):  
Heat Stress ◽  
Photosystem I ◽  
Electron Flow ◽  
Cyclic Electron Flow

scholarly journals Increasing cyclic electron flow mediated by NDH is related to heat tolerance under low light in grape leaves

2017 ◽  
Author(s):  
Yongjiang Sun ◽  
Guimei Hao ◽  
Yulu Gao ◽  
Yuanpeng Du ◽  
Xinhong Yang ◽  
...  
Keyword(s):  
Heat Stress ◽  
Methyl Viologen ◽  
Physiological Function ◽  
Electron Flow ◽  
D1 Protein ◽  
Cyclic Electron Flow ◽  
Half Time ◽  
Low Light ◽  
Psii Photochemistry ◽  
Critical Temperature Tc

Examination of the effects of high temperature (42 °C) on the photoinhibition of photosystem II (PSII) in grape leaves revealed that the extent of photoinhibition of PSII was lower in the light (200 μmol m-2 s-1) than in the dark. Heat stress in the dark induced severe injury in the grapevines, as determined by the critical temperature (Tc). The maximal efficiency of PSII photochemistry (Fv/Fm) decreased significantly in the dark, but it decreased much less in the light. In addition, there was a lower level of degradation of the D1 protein in the light than in the dark. Furthermore, the NAD(P)H dehydrogenase (NDH)-dependent cyclic electron flow (CEF) was remarkably enhanced in the light, but it was suppressed in the dark. The half-time of P700+ re-reduction (t1/2) was reduced moer in in the light than in the dark during heat stress. Compared to the control leaves, the antimycin A (AA)-treated leaves showed much less of a decrease in Fv/Fm in the light than in the dark during heat stress; however, this increase seemed to disappear in methyl viologen (MV)-treated leaves. Based on these results, we propose a significant physiological function of the NDH-dependent CEF pathway under low light is the protection of PSII against heat-induced photoinhibition.

scholarly journals Increasing cyclic electron flow mediated by NDH is related to heat tolerance under low light in grape leaves

2017 ◽  
Author(s):  
Yongjiang Sun ◽  
Guimei Hao ◽  
Yulu Gao ◽  
Yuanpeng Du ◽  
Xinhong Yang ◽  
...  
Keyword(s):  
Heat Stress ◽  
Methyl Viologen ◽  
Physiological Function ◽  
Electron Flow ◽  
D1 Protein ◽  
Cyclic Electron Flow ◽  
Half Time ◽  
Low Light ◽  
Psii Photochemistry ◽  
Critical Temperature Tc

Examination of the effects of high temperature (42 °C) on the photoinhibition of photosystem II (PSII) in grape leaves revealed that the extent of photoinhibition of PSII was lower in the light (200 μmol m-2 s-1) than in the dark. Heat stress in the dark induced severe injury in the grapevines, as determined by the critical temperature (Tc). The maximal efficiency of PSII photochemistry (Fv/Fm) decreased significantly in the dark, but it decreased much less in the light. In addition, there was a lower level of degradation of the D1 protein in the light than in the dark. Furthermore, the NAD(P)H dehydrogenase (NDH)-dependent cyclic electron flow (CEF) was remarkably enhanced in the light, but it was suppressed in the dark. The half-time of P700+ re-reduction (t1/2) was reduced moer in in the light than in the dark during heat stress. Compared to the control leaves, the antimycin A (AA)-treated leaves showed much less of a decrease in Fv/Fm in the light than in the dark during heat stress; however, this increase seemed to disappear in methyl viologen (MV)-treated leaves. Based on these results, we propose a significant physiological function of the NDH-dependent CEF pathway under low light is the protection of PSII against heat-induced photoinhibition.

Physiological Role of Cyclic Electron Flow in Higher Plants

2012 ◽  
Vol 30 (1) ◽  
pp. 100
Author(s):  
Wei HUANG ◽  
Shi-Bao ZHANG ◽  
Kun-Fang CAO
Keyword(s):  
Higher Plants ◽  
Electron Flow ◽  
Physiological Role ◽  
Cyclic Electron Flow

scholarly journals Characterization of Short-Term Heat Stress in Holstein Dairy Cows Using Altered Indicators of Metabolomics, Blood Parameters, Milk MicroRNA-216 and Characteristics

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 722
Author(s):  
Jang-Hoon Jo ◽  
Jalil Ghassemi Nejad ◽  
Dong-Qiao Peng ◽  
Hye-Ran Kim ◽  
Sang-Ho Kim ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Blood Parameters ◽  
Negative Effects ◽  
Short Term ◽  
Lactating Cows ◽  
Humidity Index ◽  
Holstein Dairy Cows

This study aims to characterize the influence of short-term heat stress (HS; 4 day) in early lactating Holstein dairy cows, in terms of triggering blood metabolomics and parameters, milk yield and composition, and milk microRNA expression. Eight cows (milk yield = 30 ± 1.5 kg/day, parity = 1.09 ± 0.05) were homogeneously housed in environmentally controlled chambers, assigned into two groups with respect to the temperature humidity index (THI) at two distinct levels: approximately ~71 (low-temperature, low-humidity; LTLH) and ~86 (high-temperature, high-humidity; HTHH). Average feed intake (FI) dropped about 10 kg in the HTHH group, compared with the LTLH group (p = 0.001), whereas water intake was only numerically higher (p = 0.183) in the HTHH group than in the LTLH group. Physiological parameters, including rectal temperature (p = 0.001) and heart rate (p = 0.038), were significantly higher in the HTHH group than in the LTLH group. Plasma cortisol and haptoglobin were higher (p < 0.05) in the HTHH group, compared to the LTLH group. Milk yield, milk fat yield, 3.5% fat-corrected milk (FCM), and energy-corrected milk (ECM) were lower (p < 0.05) in the HTHH group than in the LTLH group. Higher relative expression of milk miRNA-216 was observed in the HTHH group (p < 0.05). Valine, isoleucine, methionine, phenylalanine, tyrosine, tryptophan, lactic acid, 3-phenylpropionic acid, 1,5-anhydro-D-sorbitol, myo-inositol, and urea were decreased (p < 0.05). These results suggest that early lactating cows are more vulnerable to short-term (4 day) high THI levels—that is, HTHH conditions—compared with LTLH, considering the enormous negative effects observed in measured blood metabolomics and parameters, milk yield and compositions, and milk miRNA-216 expression.

scholarly journals Analytical dataset of short-term heat stress induced reshuffling of metabolism and transcriptomes in maize grown under elevated CO2

Data in Brief ◽  
2020 ◽  
Vol 28 ◽  
pp. 105004
Author(s):  
Jemaa Essemine ◽  
Jikai Li ◽  
Genyun Chen ◽  
Mingnan Qu
Keyword(s):  
Heat Stress ◽  
Elevated Co2 ◽  
Short Term

Cyclic electron flow around photosystem I is enhanced at low pH

2014 ◽  
Vol 83 ◽  
pp. 194-199 ◽  
Author(s):  
Teena Tongra ◽  
Sudhakar Bharti ◽  
Anjana Jajoo
Keyword(s):  
Photosystem I ◽  
Electron Flow ◽  
Low Ph ◽  
Cyclic Electron Flow
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