scholarly journals Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growth

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Yanling Jiang ◽  
Zhenzhu Xu ◽  
Guangsheng Zhou ◽  
Tao Liu
Keyword(s):  
Plant Growth ◽  
Elevated Co2 ◽  
Photosynthetic Capacity ◽  
Water Status ◽  
Cell Organelles

Elevated CO2 enhances plant growth in droughted N2 -fixing alfalfa without improving water status

1999 ◽  
Vol 107 (1) ◽  
pp. 84-89 ◽  
Author(s):  
I. De Luis ◽  
J. J. Irigoyen ◽  
M. Sánchez-Díaz
Keyword(s):  
Plant Growth ◽  
Elevated Co2 ◽  
Water Status

Elevated CO2 causes different growth stimulation, water and nitrogen use efficiencies and leaf ultrastructure responses in two conifer species under intra- and interspecific competition

2021 ◽  
Author(s):  
Lei Yu ◽  
Haojie Dong ◽  
Zongdi Huang ◽  
Helena Korpelainen ◽  
Chunyang Li
Keyword(s):  
Plant Growth ◽  
Interspecific Competition ◽  
Elevated Co2 ◽  
Morphological Traits ◽  
Photosynthetic Capacity ◽  
Plant Competition ◽  
Biomass Accumulation ◽  
Leaf Ultrastructure ◽  
Nitrogen Use ◽  
Ectomycorrhizal Infection

Abstract The continuously increasing atmospheric carbon dioxide concentration ([CO2]) has substantial effects on plant growth, and on the composition and structure of forests. However, how plants respond to elevated [CO2] (e[CO2]) under intra- and interspecific competition has been largely overlooked. In this study, we employed Abies faxoniana and Picea purpurea seedlings to explore the effects of e[CO2] (700 ppm) and plant–plant competition on plant growth, physiological and morphological traits, and leaf ultrastructure. We found that e[CO2] stimulated plant growth, photosynthesis and nonstructural carbohydrates (NSC), affected morphological traits and leaf ultrastructure, and enhanced water and nitrogen use efficiencies in A. faxoniana and P. purpurea. Under interspecific competition and e[CO2], P. purpurea showed a higher biomass accumulation, photosynthetic capacity and rate of ectomycorrhizal infection, and higher water and nitrogen use efficiencies compared with A. faxoniana. However, under intraspecific competition and e[CO2], the two conifers showed no differences in biomass accumulation, photosynthetic capacity, and water and nitrogen use efficiencies. In addition, under interspecific competition and e[CO2], A. faxoniana exhibited higher NSC levels in leaves as well as more frequent and greater starch granules, which may indicate carbohydrate limitation. Consequently, we concluded that under interspecific competition, P. purpurea possesses a positive growth and adjustment strategy (e.g., a higher photosynthetic capacity and rate of ectomycorrhizal infection, and higher water and nitrogen use efficiencies), while A. faxoniana likely suffers from carbohydrate limitation to cope with rising [CO2]. Our study highlights that plant–plant competition should be taken into consideration when assessing the impact of rising [CO2] on the plant growth and physiological performance.

Elevated CO2 alleviates the impact of drought on barley improving water status by lowering stomatal conductance and delaying its effects on photosynthesis

2007 ◽  
Vol 59 (3) ◽  
pp. 252-263 ◽  
Author(s):  
Anabel Robredo ◽  
Usue Pérez-López ◽  
Hector Sainz de la Maza ◽  
Begoña González-Moro ◽  
Maite Lacuesta ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Elevated Co2 ◽  
Water Status ◽  
The Impact

scholarly journals Effect of Water Regime and Nitrogen Fertilisation on Growth Dynamics, Water Status and Yield of Burley Tobacco (Nicotianatabacum L.)

2004 ◽  
Vol 21 (4) ◽  
pp. 223-233
Author(s):  
C Ruggiero ◽  
G Angelino ◽  
S Ascione ◽  
A Napolitano
Keyword(s):  
Plant Growth ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Water Status ◽  
Turgor Pressure ◽  
Plant Water Status ◽  
Plant Water ◽  
Nitrogen Fertilisation ◽  
Burley Tobacco ◽  
Use Efficiency

AbstractThe results of a two-year research project into burley tobacco are reported and discussed. Three irrigation levels (40, 80 and 120% restitution of evapotranspiration (ET)) were factorially combined with four levels of nitrogen fertilisation (0, 80, 160 and 240 kg ha). Leaf area, leaf and stem dry matter and root development were measured. We monitored the water status of the 0-90 cm soil layer, the plants and stomatal resistance. Relations were also studied between leaf turgor pressure and plant growth, between the irrigation regime and plant water status, and between root and shoot development. Finally, water use efficiency (WUE) and quality and quantity of cured leaves yields were evaluated. Nitrogen fertilisation did not affect plant water status, although it promoted plant growth, both in terms of leaf area and leaf and stem dry matter, and induced a yield increase in quantity and quality. Our trial showed little interaction between nitrogen fertilization level and water regime. Under such agronomic condition, the margins for increasing plant growth with nitrogen fertilization are limited, which is why application of nitrogen rates in excess of 160 kg haappear inadvisable. The difference in irrigation volumes led to a different soil water content which affected plant water status, stomatal functioning, plant growth, both in the roots and shoots, yield and quality of the cured leaves. The latter did not vary with the increase in water volume, while yield increased. Water use efficiency increased as the irrigation volume decreased and varied during the cropping cycle, increasing until early bloom, then decreasing. Relations between leaf turgor pressure and plant growth highlighted the different response of plants subjected to water stress compared with non-stressed plants.

scholarly journals Carbon and oxygen isotope analysis of leaf biomass reveals contrasting photosynthetic responses to elevated CO<sub>2</sub> near geologic vents in Yellowstone National Park

2009 ◽  
Vol 6 (1) ◽  
pp. 25-31 ◽  
Author(s):  
S. Sharma ◽  
D. G. Williams
Keyword(s):  
Stomatal Conductance ◽  
Oxygen Isotope ◽  
Elevated Co2 ◽  
National Park ◽  
Photosynthetic Capacity ◽  
Lodgepole Pine ◽  
Leaf Biomass ◽  
Carbon And Oxygen Isotope ◽  
Co2 Levels ◽  
Photosynthetic Responses

Abstract. In this study we explore the use of natural CO2 emissions in Yellowstone National Park (YNP) in Wyoming, USA to study responses of natural vegetation to elevated CO2 levels. Radiocarbon (14C) analysis of leaf biomass from a conifer (Pinus contortus; lodgepole pine) and an invasive, non-native herb (Linaria dalmatica; Dalmation toadflax) was used to trace the inputs of vent CO2 and quantify assimilation-weighted CO2 concentrations experienced by individual plants near vents and in comparable locations with no geologic CO2 exposure. The carbon and oxygen isotopic composition and nitrogen percent of leaf biomass from the same plants was used to investigate photosynthetic responses of these plants to naturally elevated atmospheric CO2 concentrations. The coupled shifts in carbon and oxygen isotope values suggest that dalmation toadflax responded to elevated CO2 exposure by increasing stomatal conductance with no change in photosynthetic capacity and lodgepole pine apparently responded by decreasing stomatal conductance and photosynthetic capacity. Lodgepole pine saplings exposed to elevated levels of CO2 likewise had reduced leaf nitrogen concentrations compared to plants with no enhanced CO2 exposure, further suggesting widespread and dominant conifer down-regulated photosynthetic capacity under elevated CO2 levels near geologic vents.

Carbon dioxide enrichment and water stress interaction on growth of two tomato cultivars

1984 ◽  
Vol 102 (3) ◽  
pp. 687-693 ◽  
Author(s):  
Alejandra Paez ◽  
H. Hellmers ◽  
B. R. Strain
Keyword(s):  
Carbon Dioxide ◽  
Water Stress ◽  
Plant Growth ◽  
Water Potential ◽  
Leaf Water Potential ◽  
Osmotic Potential ◽  
Water Status ◽  
Carbon Dioxide Concentration ◽  
Leaf Water ◽  
Total Leaf

SummaryIf atmospheric carbon dioxide concentration continues to increase, plant growth and crop yield could be affected. New Yorker and Better Boy cultivars of tomato (Lycopersicon esculentum) were used to investigate possible intraspecific variation in the response of crop species to increased CO2. Because precipitation and temperature are predicted to change with the increasing atmospheric CO2 concentration, the response of the two cultivars to the interaction between CO2 and water stress was also examined. Seeds of the two cultivars were germinated and grown under controlled environmental conditions, in either 350 or 675 μ1 CO2/1.The plant water status of the two cultivars was inherently different but was little affected by the CO2 concentration when the plants were well watered. When water was withheld for 5 days the total leaf water potential and osmotic potential decreased in both CO2 treatments but less rapidly in high CO2 than in low. Under low CO2 total leaf water potential decreased to a lower value than osmotic potential. The differences were due, at least in part, to the reduced stomatal conductance and transpiration rate under high CO2.Increased CO2 ameliorated the detrimental effects of drought stress on plant growth. The results indicate that increased CO2 could differentially affect the relative drought resistance of species cultivars.

scholarly journals Effects of elevated CO2, warming and drought episodes on plant carbon uptake in a temperate heath ecosystem are controlled by soil water status

2011 ◽  
Vol 34 (7) ◽  
pp. 1207-1222 ◽  
Author(s):  
K. R. ALBERT ◽  
H. RO-POULSEN ◽  
T. N. MIKKELSEN ◽  
A. MICHELSEN ◽  
L. VAN DER LINDEN ◽  
...  
Keyword(s):  
Soil Water ◽  
Elevated Co2 ◽  
Water Status ◽  
Carbon Uptake ◽  
Soil Water Status
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