The Susceptibility of Cucumber and Sweet Pepper to Chilling Under Low Irradiance is Related to Energy Dissipation and Water-Water Cycle

Li, X.-G.; Meng, Qingwei; Jiang, Gaoxi; Qi, Zhang

doi:10.1023/b:phot.0000011959.30746.c0

Cited by 65 publications

(87 citation statements)

References 35 publications

(45 reference statements)

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“…Under environmental stress, the photoinhibition took place mainly in PSII, which may be partly due to stressassociated oxidative damage to chloroplast components (Li et al 2003). In the present study, the V-to-Z conversion of the xanthophyll cycle played a more important role in preventing excessive ROS such as H 2 O 2 and O 2 Á-(Figs.…”

Section: Discussionmentioning

confidence: 99%

Peanut violaxanthin de-epoxidase alleviates the sensitivity of PSII photoinhibition to heat and high irradiance stress in transgenic tobacco

et al. 2015

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This is the first study on peanut VDE, which led to multiple biochemical and physiological changes to heat and HI stress by improving de-epoxidation of the xanthophylls cycle. A peanut (Arachis hypogaea L.) violaxanthin de-epoxidase gene (AhVDE) was isolated by RT-PCR and RACE methods. The deduced amino acid sequence of AhVDE showed high identities with violaxanthin de-epoxidase of other plant species. The expression of AhVDE was obviously upregulated by 4, 40 °C and high light, NaCl, and abscisic acid. Sense and RNAi transgenic tobaccos were further used to investigate the physiological effects and functional mechanism of AhVDE. Compared with WT, the content of Z, the ratio of (A + Z)/(V + A + Z) and the non-photochemical quenching were higher in sense plants, and lower in the RNAi lines under heat and high irradiance (HI) stress, respectively. Additionally, photoinhibition of photosystem II (PSII) reflected by the maximal photochemical efficiency in WT lines was more severe, and in the RNAi lines was the most severe compared with that in the sense lines. Meanwhile, overexpressing AhVDE also led to multiple biochemical and physiological changes under heat and HI stress. Higher activities of superoxide dismutase and ascorbate peroxidase, lower content of reactive oxygen species and slighter membrane damage were observed in sense lines after heat and HI stress. These results suggested that, peanut VDE can alleviate PSII photoinhibition to heat and HI stress by improving the xanthophyll cycle-dependent energy dissipation.

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Section: Discussionmentioning

confidence: 99%

Peanut violaxanthin de-epoxidase alleviates the sensitivity of PSII photoinhibition to heat and high irradiance stress in transgenic tobacco

et al. 2015

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“…At the same time, the increased level of NPQ indicates that a photoprotective process of the PSII was taking place. We can suppose that the excitation pressure on PSII reaction centers is alleviated by the xanthophyll cycle diverting photon energy into heat via zeaxanthin (Gilmore et al 1995;Xu et al 1999;Li et al 2003;Sui et al 2007). The opening of stomata between 0 and 24 h of chilling could be related to the increase of NPQ.…”

Section: Discussionmentioning

confidence: 99%

Effect of chilling on photosynthesis and antioxidant enzymes in Hevea brasiliensis Muell. Arg.

Mai

Herbette

Vandame

et al. 2009

Trees

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The aim of the present study was to assess the tolerance of Hevea brasiliensis to chilling temperatures since rubber production has been extended to sub-optimal environments. PB260 clone was used to analyze the responses of leaves chilled at 10°C during 96 h, as well as their recovery at 28°C. Some key parameters were used to evaluate photosynthetic apparatus functioning, membrane damage (electrolyte leakage) and oxidative stress. A shortterm response versus a long-term one have been recorded, the time point of 24 h, when stomata closure was effective, being the border between the two responses. P n decreased dramatically at 1 h, and Fv/Fm was slightly affected. NPQ reached its maximal level between 4 and 7 h. Lipid peroxidation and membrane lysis were observed between 48 and 96 h. Activities of antioxidant enzymes increased, along with the induction of antioxidant gene expression. Finally, the plants were capable to recover (net photosynthetic rate, photochemical efficiency, antioxidant enzymes activities) when placed back to 28°C showing that PB260 can withstand long-term chilling.

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“…Our studies showed that chilling stress under low irradiance could cause the decrease of photosynthesis and photoinhibition of both photosystems, PS2 and PS1 (Li et al 2003(Li et al , 2004b. The maximal photochemical efficiency of PS2 (F v /F m ) and the oxidation level of P700 are often used to reflect the extent of photoinhibition of PS2 and PS1, respectively.…”

Section: Introductionmentioning

confidence: 94%

Cooperation of xanthophyll cycle with water-water cycle in the protection of photosystems 1 and 2 against inactivation during chilling stress under low irradiance

Li¹,

Bi²,

Zhao³

et al. 2005

Photosynt.

Self Cite

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The xanthophyll cycle and the water-water cycle had different functional significance in chilling-sensitive sweet pepper upon exposure to chilling temperature (4 °C) under low irradiance (100 µmol m -2 s -1 ) for 6 h. During chilling stress, effects of non-photochemical quenching (NPQ) on photosystem 2 (PS2) in dithiothreitol (DTT) fed leaves remained distinguishable from that of the water-water cycle in diethyldithiocarbamate (DDTC) fed leaves. In DTT-fed leaves, NPQ decreased greatly accompanied by visible inhibition of the de-epoxidized ratio of the xanthophyll cycle, and maximum photochemical efficiency of PS2 (F v /F m ) decreased markedly. Thus the xanthophyll cycle-dependent NPQ could protect PS2 through energy dissipation under chilling stress. However, NPQ had a slighter effect on photosystem 1 (PS1) in DTT-fed leaves than in DDTC-fed leaves, whereas effects of the water-water cycle on PS1 remained distinguishable from that of NPQ. Inhibiting superoxide dismutase (SOD) activity increased the accumulation of O 2 , the oxidation level of P700 (P700 + ) decreased markedly relative to the control and DTT-fed leaves. Both F v /F m and NPQ changed little in DDTC-fed leaves accompanied by little change of (A+Z)/(V+A+Z). This is the active oxygen species inducing PS1 photoinhibition in sweet pepper. The water-water cycle can be interrupted easily at chilling temperature. We propose that during chilling stress under low irradiance, the xanthophyll cycle-dependent NPQ has the main function to protect PS2, whereas the water-water cycle is not only the pathway to dissipate energy but also the dominant factor causing PS1 chilling-sensitivity in sweet pepper.

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The Susceptibility of Cucumber and Sweet Pepper to Chilling Under Low Irradiance is Related to Energy Dissipation and Water-Water Cycle

Cited by 65 publications

References 35 publications

Peanut violaxanthin de-epoxidase alleviates the sensitivity of PSII photoinhibition to heat and high irradiance stress in transgenic tobacco

Peanut violaxanthin de-epoxidase alleviates the sensitivity of PSII photoinhibition to heat and high irradiance stress in transgenic tobacco

Effect of chilling on photosynthesis and antioxidant enzymes in Hevea brasiliensis Muell. Arg.

Cooperation of xanthophyll cycle with water-water cycle in the protection of photosystems 1 and 2 against inactivation during chilling stress under low irradiance

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