In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Gururani, Mayank Anand; Venkatesh, Jelli; Ganesan, Markkandan; Strasser, Reto J.; Han, Yun‐Jeong; Kim, Jeong-Il; Lee, Hyo-Yeon; Song, Pill‐Soon

doi:10.1371/journal.pone.0127200

Cited by 74 publications

(55 citation statements)

References 64 publications

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“…6). Meanwhile, decreases in ETo/RC, REo/RC, ETo/CSo, and REo/CSo indicate a reduction in energy transmitted through the electron transport chain at low temperature [63]. Similar results were obtained in soybeans subjected to chilling [37].…”

Section: Photoinhibition and Photosynthetic Acclimation At Low Tempersupporting

confidence: 74%

Photosynthetic responses mediate the adaptation of two Lotus japonicus ecotypes to low temperature

et al. 2016

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Section: Photoinhibition and Photosynthetic Acclimation At Low Tempersupporting

confidence: 74%

Photosynthetic responses mediate the adaptation of two Lotus japonicus ecotypes to low temperature

et al. 2016

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“…These results are similarly to previous studies previous studies performed in cucumber [13]. Moreover, the decrease of NPQ accompanied by an increase of qP in EG agree with previous studies, and could be an effective strategy to improve the photochemical efficiency and protect plants from photooxidation under cold stress conditions [14]. Our results show that the photosynthetic activity of plants was severely affected by the cold stress and the cold-induced protection mechanisms were closely associated with the cold resistance.…”

Section: Discussionsupporting

confidence: 93%

Effects of Cold Stress on the Photosynthesis and Antioxidant System of <em>Rhododendron chrysanthum</em> Pall.

Zhou¹,

Chen²,

Wu³

et al. 2017

Preprint

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Rhododendron chrysanthum Pall., live in Changbai Mountain being exposed to chilling temperature, high light intensities and water scarcity condition. To adapt to the harsh environment, the cold resistance mechanisms of R. chrysanthum have been successfully evolved in the long-term adaptive process. In our present work, the methods of proteomics combined with physiological and biochemical analyses were used to investigate the effects of cold stress on the photosynthesis and antioxidant system of Rhododendron chrysanthum Pall. and the molecular mechanisms involved in cold resistance of plants. A total of 153 photosynthesis related proteins were identified in present work, of which 7 proteins including Rubisco large subunit (rbcL) were up-regulated in experiment group (EG) compared with control group (CG). Simultaneously, four chlorophyll fluorescence parameters were measured in present study. The results showed that the maximum photochemical efficiency of photosystem II (Fv/Fm), actual quantum yield of PSII (Y(II)) and photochemical quenching (qP) were significantly higher in EG, whereas the non-photochemical quenching (NPQ) was notably decreased. Cold stress could lead to a significant reduction in electron transport rate (ETR) accompanied with an increase in excitation pressure (1-qP). The abundance of PetE which involved in the plants photosynthetic electron transfer was also significantly influenced by cold stress. Moreover, the up-regulated expressions and higher levels of enzymatic activities of Glutathione peroxidase (GPX) and Ascorbate peroxidases (APXs) were detected in EG. All these changes which can help plants to survive in low temperature are considered as the crucial parts of cold tolerance mechanisms. These results revealed that photosynthesis and redox adjustment play significant roles in the defense of cold-induced damage.

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“…The decrease in Fv/Fm may indicate that RCs were negatively affected and this may explain why all parameters related to RCs increased in plants grown at high pH (as shown on the left side of Figure ). The reduction found in the variable fluorescence emission in the first step may have been responsible for the increment of REo/RC, suggesting that there was a significant impact on the donor side of PSI (Gururani et al ., ). These results highlight that alkaline was stress affected both stomatal and non‐stomatal components of photosynthesis.…”

Section: Discussionmentioning

confidence: 97%

“…Given the close positive correlations often observed between the rate of net photosynthesis and mineral nutrient content of leaves (Marschner, ), photosynthetic carbon fixation and photosystem II (PSII) activity were characterized in these plants to gain insight into the separate effects of pH and nutrient stress. Measuring the quantum efficiency of light utilization by PSII can contribute to the identification of non‐stomatal causes for reduced carbon fixation under stress (Gururani et al ., ). Here, we assessed the functioning of PSII in response to alkaline stress conditions.…”

Section: Introductionmentioning

confidence: 97%

Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils

Luna

Aguirre

Pittaro

et al. 2016

Grass and Forage Science

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Alkaline and saline–alkaline soils impose severe restrictions on plant growth. Panicum coloratum var. coloratum is a perennial C4 forage grass widely used in tropical and subtropical environments. Published information on its responses to alkaline soil conditions is scarce. The objectives of this study were (i) to characterize the effects of alkaline substrates on germination and initial growth in this species, (ii) to assess the influence of high pH in combination with reduced availability of either nutrients or oxygen and salinity, on plant growth and (iii) to evaluate some physiological traits potentially responsible for growth restrictions under alkaline soil conditions. Trials were conducted in a greenhouse. Germination and early plant survival were not affected by alkalinity. To isolate the effects of high pH, reduced nutrient and oxygen availability on growth, plants were grown either in neutral or alkaline soil, in hydroponics, in neutralized alkaline soil (with or without supplementary fertilization), or were flooded to induce hypoxia. Alkalinity effects on growth in hydroponics were milder than in soil. Growth in alkaline soil with nutrient supplement was still significantly lower (by 40%) than in neutral soil. Both alkalinity and hypoxia reduced growth non‐synergistically. These results show that studies of plant response to alkaline substrates carried out in aerated nutrient solutions can only partially address the complexity of this stress. Photosynthesis and PSII activity were among the physiological mechanisms negatively affected by alkalinity and may be partially responsible for the growth limitations observed in P. coloratum under alkaline conditions.

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In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Cited by 74 publications

References 64 publications

Photosynthetic responses mediate the adaptation of two Lotus japonicus ecotypes to low temperature

Photosynthetic responses mediate the adaptation of two Lotus japonicus ecotypes to low temperature

Effects of Cold Stress on the Photosynthesis and Antioxidant System of <em>Rhododendron chrysanthum</em> Pall.

Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils

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