Overproduction of Photosynthetic Electrons is Associated with Chilling Injury in Green Leaves

Alam, Badre; Jacob, James

doi:10.1023/a:1020110710726

Cited by 27 publications

(9 citation statements)

References 17 publications

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“…Our results showing that photosynthesis in rubber can acclimate to growth temperature are consistent with Alam and Jacob (2002) who showed that low temperature stress (around 9.5-19.3°C) inhibits net CO 2 assimilation rate to a larger extent in rubber than in other species acclimated to cool conditions of the mountain in India and with Alam et al (2005) who indicated that different growth environments affected not only net photosynthetic rate, but also carboxylation efficiency in rubber. Photosynthetic potential was lower in individuals grown in colder environments.…”

supporting

confidence: 91%

Photosynthetic capacity and temperature responses of photosynthesis of rubber trees (Hevea brasiliensis Müll. Arg.) acclimate to changes in ambient temperatures

Kositsup

Montpied

Kasemsap

et al. 2008

Trees

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The aim of this study was to assess the temperature response of photosynthesis in rubber trees (Hevea brasiliensis Müll. Arg.) to provide data for process-based growth modeling, and to test whether photosynthetic capacity and temperature response of photosynthesis acclimates to changes in ambient temperature. Net CO 2 assimilation rate (A) was measured in rubber saplings grown in a nursery or in growth chambers at 18 and 28°C. The temperature response of A was measured from 9 to 45°C and the data were fitted to an empirical model. Photosynthetic capacity (maximal carboxylation rate, V cmax , and maximal light driven electron flux, J max ) of plants acclimated to 18 and 28°C were estimated by fitting a biochemical photosynthesis model to the CO 2 response curves (A-C i curves) at six temperatures: 15, 22, 28, 32, 36 and 40°C. The optimal temperature for A (T opt ) was much lower in plants grown at 18°C compared to 28°C and nursery. Net CO 2 assimilation rate at optimal temperature (A opt ), V cmax and J max at a reference temperature of 25°C (V cmax25 and J max25 ) as well as activation energy of V cmax and J max (E aV and E aJ ) decreased in individuals acclimated to 18°C. The optimal temperature for V cmax and J max could not be clearly defined from our response curves, as they always were above 36°C and not far from 40°C. The ratio J max25 /V cmax25 was larger in plants acclimated to 18°C. Less nitrogen was present and photosynthetic nitrogen use efficiency (V cmax25 /N a ) was smaller in leaves acclimated to 18°C. These results indicate that rubber saplings acclimated their photosynthetic characteristics in response to growth temperature, and that higher temperatures resulted in an enhanced photosynthetic capacity in the leaves, as well as larger activation energy for photosynthesis.

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supporting

confidence: 91%

Photosynthetic capacity and temperature responses of photosynthesis of rubber trees (Hevea brasiliensis Müll. Arg.) acclimate to changes in ambient temperatures

Kositsup

Montpied

Kasemsap

et al. 2008

Trees

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“…MDA production, an indicator of lipid peroxidation, was significantly increased at 72 h, suggesting that an oxidative stress took place in leaf cells. Alam and Jacob (2002) also observed an accumulation of MDA in the leaves of rubber tree cultivated in cool mountains with high Trees (2009) 23:863-874 871 irradiance in the south Indian state of Kerala. Following excessive production of ROS, cell damage has occurred, as shown by the increase in electrolyte leakage at 96 h. At the end of the chilling time course (96 h), DHAR, GR and APX activities increased dramatically.…”

Section: Discussionmentioning

confidence: 78%

“…In this process, the reaction centers of PSII may be reversibly inactivated or destroyed (Chow 1994;Alam and Jacob 2002;Govindachary et al 2004;Feng and Cao 2005). After 24 h of chilling, NPQ decreasing was associated with a decrease in F m .…”

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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“…Thousands of genes are reprogrammed in expression and multiple metabolic pathways are modified in both temperate and tropical plants in response to low temperature ( Fowler and Thomashow, 2002 ; Krasensky and Jonak, 2012 ; Zhang et al, 2012 ). The Calvin–Benson cycle enzymes are more sensitive to low temperature than photochemical reactions, which reduces the utilization of light energy absorbed by chlorophyll and results in an elevated production of reactive oxygen species (ROS) ( Allen and Ort, 2001 ; Alam and Jacob, 2002 ). The accumulated ROS may induce gene expression as a second messenger in signal transduction, or result in oxidative damages to photosynthetic apparatus and even lead to plant death if ROS could not be effectively scavenged ( Foyer and Noctor, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Chloroplast Protein 12 Expression Alters Growth and Chilling Tolerance in Tropical Forage Stylosanthes guianensis (Aublet) Sw

Qiu

Zhou

et al. 2018

Front. Plant Sci.

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Stylosanthes guianensis (Aublet) Sw. is a tropical forage legume with soil acidity tolerance and excellent adaptation to infertile soils, but sensitive to chilling. To understand the molecular responses of S. guianensis to chilling, differentially expressed genes between a chilling tolerant mutant 7–1 and the wild type were identified using suppression subtractive hybridization, and eight of them were confirmed and the regulation pattern were analyzed using quantitative reverse transcription PCR (qRT-PCR). Chloroplast protein 12 (CP12) functions to regulate the Calvin cycle by forming a ternary complex with glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and phosphoribulokinase (PRK). SgCP12 transcript was induced by chilling in both plants, and higher levels were observed in 7–1 than in the wild type, implying a potential role of SgCP12 in chilling tolerance. To confirm this, transgenic S. guianensis plants over-expressing or down-regulating SgCP12 were generated, respectively. Higher Fv/Fm and survival rate and lower ion leakage were observed in transgenic plants overexpressing SgCP12 as compared with the wild type after chilling treatment, while lower Fv/Fm and survival rate and higher ion leakage were found in SgCP12 antisense plants. SgCP12 overexpression plants showed promoted growth with increased plant height and fresh weight, while the antisense plants exhibited reduced growth with decreased plant height and fresh weight as compared with the wild type. The results indicated that regulation of SgCP12 expression alters plant growth and chilling tolerance in S. guianensis. In addition, higher levels of net photosynthetic rate (Pn), GAPDH and PRK activities were observed in SgCP12 overexpression transgenic plants, while lower levels in antisense plants than in the wild type under both control and chilling conditions, indicating that altered activities of GAPDH and PRK were associated with the changed Pn in transgenic S. guianensis. Our results suggest that SgCP12 regulates GAPDH and PRK activities, Pn, and chilling tolerance in S. guianensis.

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Overproduction of Photosynthetic Electrons is Associated with Chilling Injury in Green Leaves

Cited by 27 publications

References 17 publications

Photosynthetic capacity and temperature responses of photosynthesis of rubber trees (Hevea brasiliensis Müll. Arg.) acclimate to changes in ambient temperatures

Photosynthetic capacity and temperature responses of photosynthesis of rubber trees (Hevea brasiliensis Müll. Arg.) acclimate to changes in ambient temperatures

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

Chloroplast Protein 12 Expression Alters Growth and Chilling Tolerance in Tropical Forage Stylosanthes guianensis (Aublet) Sw

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