Changes in Cytoplasmic and Vacuolar pH in Harvested Lettuce Tissue as Influenced by CO2

Siriphanich, Jingtair; Kader, Adel A.

doi:10.21273/jashs.111.1.73

Cited by 65 publications

(3 citation statements)

References 12 publications

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“…Factors other than assimilate levels associated with the time of day of harvest may also influence the sensitivity of lettuce to brown stain. Exposure of lettuce leaves to light after harvest was reported to decrease the incidence of brown stain (17). Light that lettuce receives prior to harvest in the afternoon may decrease the sensitivity of lettuce to C 0 2, but the mechanism by which light is exerting this influence is unknown.…”

Section: Discussionmentioning

confidence: 99%

Time of Day at Harvest Influences Carbohydrate Concentration in Crisphead Lettuce and Its Sensitivity to High CO2 Levels after Harvest

Forney

Austin

1988

J. Amer. Soc. Hort. Sci.

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Concentrations of starch and sugars were measured in the cap leaf (leaf no. 1) and in every fifth leaf (5, 10, 15, 20) in heads of crisphead lettuce (Lactuca sativa L.) harvested at 0700 hr (AM) or 1400 hr (PM) PDT. Starch content increased in the cap leaf from the AM to the PM harvest, but remained unchanged in other leaves. Sucrose concentration was <5 mg·g−1 dry weight in AM-harvested lettuce, but the cap leaf, leaf 20, and stem tissue contained 43, 24, and 61 mg·g−1 dry weight, respectively, in lettuce from the PM harvest. AM harvested lettuce contained 70% to 260% more glucose and 20% to 120% more fructose than PM-harvested lettuce. Glucose and fructose concentrations were greatest in leaf 10 (110 and 120 mg·g−1 dry weight, respectively) and decreased 20% to 50% in inner and outer leaves. Exposure of lettuce to 7.5% or 10% CO2 for 12 days at 2.5°C followed by air for 3 days at 10° caused more severe injury on AM- than on PM-harvested lettuce. Injury occurred primarily on leaves 7 through 17, with those between leaves 10 and 15 being most severely affected. High reducing sugar content at harvest did not appear to decrease the sensitivity of lettuce to high CO2 during storage.

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Section: Discussionmentioning

confidence: 99%

Time of Day at Harvest Influences Carbohydrate Concentration in Crisphead Lettuce and Its Sensitivity to High CO2 Levels after Harvest

Forney

Austin

1988

J. Amer. Soc. Hort. Sci.

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“…Previous studies have consistently shown that higher levels of CO 2 have a significant impact on the physiological functioning of plants [4][5][6]. On the one hand, elevated CO 2 directly affects plant photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Physiological and Proteomic Responses of the Tetraploid Robinia pseudoacacia L. to High CO2 Levels

Li,

Zhang,

Lei

et al. 2024

IJMS

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The increase in atmospheric CO2 concentration is a significant factor in triggering global warming. CO2 is essential for plant photosynthesis, but excessive CO2 can negatively impact photosynthesis and its associated physiological and biochemical processes. The tetraploid Robinia pseudoacacia L., a superior and improved variety, exhibits high tolerance to abiotic stress. In this study, we investigated the physiological and proteomic response mechanisms of the tetraploid R. pseudoacacia under high CO2 treatment. The results of our physiological and biochemical analyses revealed that a 5% high concentration of CO2 hindered the growth and development of the tetraploid R. pseudoacacia and caused severe damage to the leaves. Additionally, it significantly reduced photosynthetic parameters such as Pn, Gs, Tr, and Ci, as well as respiration. The levels of chlorophyll (Chl a and b) and the fluorescent parameters of chlorophyll (Fm, Fv/Fm, qP, and ETR) also significantly decreased. Conversely, the levels of ROS (H2O2 and O2·−) were significantly increased, while the activities of antioxidant enzymes (SOD, CAT, GR, and APX) were significantly decreased. Furthermore, high CO2 induced stomatal closure by promoting the accumulation of ROS and NO in guard cells. Through a proteomic analysis, we identified a total of 1652 DAPs after high CO2 treatment. GO functional annotation revealed that these DAPs were mainly associated with redox activity, catalytic activity, and ion binding. KEGG analysis showed an enrichment of DAPs in metabolic pathways, secondary metabolite biosynthesis, amino acid biosynthesis, and photosynthetic pathways. Overall, our study provides valuable insights into the adaptation mechanisms of the tetraploid R. pseudoacacia to high CO2.

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“…Genera HCO 3 y H + (así como otros carbonatos) lo cual puede afectar al balance iónico, y por tanto, al pH intracelular (Wager, 1974b;Bown, 1985). Con estos cambios las funciones metabólicas normales no podrían ser sostenidas (Siriphanich y Kader, 1986). Smith (1963) indicó que el efecto del CO 2 sobre el contenido total de ácidos de las frutas no mostraba un panorama muy claro.…”

Section: Interacción De Altos Niveles De Co 2 Y Bajos Niveles De Ounclassified

El efecto de las atmósferas ricas en CO₂ en los patrones de acumulación de etanol, pH, acidez titulable, sólidos solubles y ácidos orgánicos en diversos productos hortofrutícolas

López

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Controlled atmospheres (CA) consist of providing commodities with a specified and precisely controlled mixture of gases in the storage atmosphere which is different from the normal air atmosphere. Modified atmospheres (MA) are different from the latter in the inhability to control with precision their composition. Some commodities are adversely affected by elevated CO 2 atmospheres preventing its commercial use. The present study was focused on CO 2 -enriched atmospheres and their effects on 20 different fruits: apple (Malus pumila, Mill.), banana (Musa paradisiaca, L.), grape (Vitis vinifera, L.), grapefruit (Citrus X paradise, Macf.), kiwi fruit (Actinidia deliciosa, Planch.), lime (Citrus limon, Burm. F.), orange (Citrus sinensis, (L.) Osbeck), peach (Prunus persica, L.), pitaya de mayo (Stenocereus griseus, (Haw.) F. Buxb.), plum (Prunus domestica, L.), prickly pear (Opuntia ficus indica, (L.) Mill.), strawberry (Fragaria X annanasa, Duch.), and vegetables: beet (Beta vulgaris, L.), broccoli (Brassica oleraceae, L. Italica group), cabbage (Brassica oleraceae, L. Capitata group), carrot (Daucus carota, L.), cucumber (Cucumis sativus, L.), lettuce (Letuca sativa, L.), potato (Solanum tuberosum, L.), and tomato (Licopersicum sculentum, L.)-, mainly on ethanol (ETOH) accumulation, during short-term exposure to an air-30% (v/v) CO 2 mixture storage atmosphere. Changes in total soluble solids (TSS), pH, total titratable acidity (TTA), and organic acids (citric, malic, pyruvic, succinic) were also evaluated. ÍNDICE Miembros del jurado 3Dedicatoria y agradecimientos .

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Changes in Cytoplasmic and Vacuolar pH in Harvested Lettuce Tissue as Influenced by CO2

Cited by 65 publications

References 12 publications

Time of Day at Harvest Influences Carbohydrate Concentration in Crisphead Lettuce and Its Sensitivity to High CO2 Levels after Harvest

Time of Day at Harvest Influences Carbohydrate Concentration in Crisphead Lettuce and Its Sensitivity to High CO2 Levels after Harvest

Physiological and Proteomic Responses of the Tetraploid Robinia pseudoacacia L. to High CO2 Levels

El efecto de las atmósferas ricas en CO₂ en los patrones de acumulación de etanol, pH, acidez titulable, sólidos solubles y ácidos orgánicos en diversos productos hortofrutícolas

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